EPA 10 - US, Canada, Mexico

2007 MaxxForce® 7
ENGINE SERVICE MANUAL
ENGINE SERVICE MANUAL

2007 MaxxForce® 7

0000002464

Navistar, Inc.
Revision 1
July 2013

2701 Navistar Drive, Lisle, IL 60532 USA

© 2013 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.
Highlights
Table 1 Summary of Changes
Location Change
Technical Service Literature Updated documentation part numbers
Figure 301, 310, 342 Updated graphics to show 2–bolt Auxiliary Accessory Mounting Bracket
replaced with 3–bolt bracket.
 ENGINE SERVICE MANUAL I

TABLE OF CONTENTS
Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Engine Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Mounting Engine on Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Engine Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Exhaust Gas Recirculation (EGR) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Variable Geometry Turbocharger (VGT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Air Compressor and Power Steering/Fuel Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

Intake and Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .171

Front Cover, Cooling System, and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .185

Cylinder Head and Valve Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215

Oil Cooler and Filter Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263

Flywheel Assembly and Flywheel Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .277

Lower Oil Pan, Upper Oil Pan, and Oil Pickup Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .305

Power Cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .315

Crankcase, Crankshaft, and Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .333

Abbreviations and Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .355

Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .361

Appendix A – Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .369

Appendix B – Torques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .379

Appendix C – Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .397

II ENGINE SERVICE MANUAL
 ENGINE SERVICE MANUAL 1

Foreword Technical Service Literature

Navistar, Inc. is committed to continuous research 1171941R4 International® MaxxForce®
and development to improve products and introduce 7 Engine Operation and
technological advances. Procedures, specifications, Maintenance Manual
and parts defined in published technical service
EGES-345-1 International® MaxxForce® 7
literature may be altered.
Engine Service Manual
This Engine Service Manual provides a general
EGES-350-2 International® MaxxForce® 7
sequence of procedures for out-of-chassis engine
Engine Diagnostic Manual
overhaul (removal, inspection, and installation). For
in-chassis service of parts and assemblies, the EGED-355-2 International® MaxxForce® 7
sequence may vary. Hard Start and No Start and
Performance Diagnostics Form
NOTE: Photo illustrations identify specific parts
or assemblies that support text and procedures; EGED-365 International® MaxxForce®
other areas in a photo illustration may not be 7 Electronic Control Systems
exact. Diagnostic Form
See vehicle manuals and Technical Service Technical Service Literature is revised periodically
Information (TSI) bulletins for additional information. and mailed automatically to “Revision Service”
subscribers. If a technical publication is ordered, the
latest revision will be supplied.
NOTE: To order technical service literature,
contact your International dealer.
2 ENGINE SERVICE MANUAL

Service Diagnosis • Knowledge of the principles of operation for

engine application and engine systems
Service diagnosis is an investigative procedure that
must be followed to find and correct an engine • Knowledge to understand and do procedures in
application problem or an engine problem. diagnostic and service publications
If the problem is engine application, see specific Technical Service Literature required for Effective
vehicle manuals for further diagnostic information. Diagnosis
If the problem is the engine, see specific Engine • Engine Service Manual
Diagnostic Manual for further diagnostic information.
• Engine Diagnostic Manual
Prerequisites for Effective Diagnosis
• Diagnostics Forms
• Availability of gauges and diagnostic test
• Electronic Control Systems Diagnostics Forms
equipment
• Service Bulletins
• Availability of current information for engine
application and engine systems
 ENGINE SERVICE MANUAL 3

Safety Information • Wear appropriate hearing protection.

This manual provides general and specific service • Wear correct work clothing.
procedures essential for reliable engine operation • Do not wear rings, watches, or other jewelry.
and your safety. Since many variations in procedures,
tools, and service parts are involved, advice for all • Restrain long hair.
possible safety conditions and hazards cannot be Fire prevention
stated.
• Make sure charged fire extinguishers are in the
Read safety instructions before doing any service and work area.
test procedures for the engine or vehicle. See related
application manuals for more information. NOTE: Check the classification of each fire
extinguisher to ensure that the following fire types
Disregard for Safety Instructions, Warnings, Cautions, can be extinguished.
and Notes in this manual can lead to injury, death or
damage to the engine or vehicle. 1. Type A — Wood, paper, textiles, and rubbish
2. Type B — Flammable liquids
SAFETY TERMINOLOGY
3. Type C — Electrical equipment
Three terms are used to stress your safety and safe
operation of the engine: Warning, Caution, and Note Batteries

Warning: A warning describes actions necessary to Batteries produce highly flammable gas during and
prevent or eliminate conditions, hazards, and unsafe after charging.
practices that can cause personal injury or death. • Always disconnect the main negative battery
Caution: A caution describes actions necessary cable first.
to prevent or eliminate conditions that can cause • Always connect the main negative battery cable
damage to the engine or vehicle. last.
Note: A note describes actions necessary for correct, • Avoid leaning over batteries.
efficient engine operation.
• Protect your eyes.
SAFETY INSTRUCTIONS • Do not expose batteries to open flames or sparks.
Vehicle • Do not smoke in workplace.
• Make sure the vehicle is in neutral, the parking Compressed air
brake is set, and the wheels are blocked before
doing any work or diagnostic procedures on the • Limit shop air pressure for blow gun to 207 kPa
engine or vehicle. (30 psi).

Work area • Use approved equipment.

• Keep work area clean, dry, and organized. • Do not direct air at body or clothing.

• Keep tools and parts off the floor. • Wear safety glasses or goggles.

• Make sure the work area is ventilated and well lit. • Wear hearing protection.

• Make sure a First Aid Kit is available. • Use shielding to protect others in the work area.

Safety equipment Tools

• Use correct lifting devices. • Make sure all tools are in good condition.

• Use safety blocks and stands. • Make sure all standard electrical tools are
grounded.
Protective measures
• Wear protective glasses and safety shoes.
4 ENGINE SERVICE MANUAL

• Check for frayed power cords before using power • Do not smoke in the work area.
tools.
• Do not refuel the tank when the engine is running.
Fluids under pressure
Removal of tools, parts, and equipment
• Use extreme caution when working on systems
• Reinstall all safety guards, shields, and covers
under pressure.
after servicing the engine.
• Follow approved procedures only.
• Make sure all tools, parts, and service equipment
Fuel are removed from the engine and vehicle after all
work is done.
• Do not over fill the fuel tank. Over fill creates a fire
hazard.
 ENGINE SYSTEMS 5

Table of Contents

Engine Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Engine Serial Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Engine Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Engine Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Engine Component Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Air Management System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Air Management Components and Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Air Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Charge Air Cooler (CAC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Variable Geometry Turbocharger (VGT) Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
VGT closed loop system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
VGT control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Exhaust Gas Recirculation (EGR) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
EGR Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
EGR Valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Intake Throttle Valve (ITV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Aftertreatment (AFT) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
AFT Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Diesel Oxidation Catalyst (DOC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Diesel Particulate Filter (DPF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
AFT Conditions and Responses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Fuel System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Low-pressure Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
High-pressure Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
High-pressure Piezo Common Rail (HPCR) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Return Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Engine Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Lubrication System Components and Oil Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Oil Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Cooling System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Cooling System Components and Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Water Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Front Crankcase Cover Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Electronic Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Electronic Control System Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Operation and Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Reference Voltage (VREF). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Signal Conditioner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
6 ENGINE SYSTEMS

Microprocessor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Microprocessor memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Flash Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
RAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Actuator Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Actuators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
H-bridge Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Exhaust Gas Recirculation (EGR) Valve and Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Intake Throttle Valve (ITV) Actuator and Position Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Glow Plug Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Engine and Vehicle Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Thermistor Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Variable Capacitance Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Micro Strain Gauge (MSG) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Magnetic Pickup Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Potentiometer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Glow Plug Control System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
 ENGINE SYSTEMS 7

Engine Identification
Engine Serial Number

Figure 2 U.S. Environmental Protection Agency

(EPA) exhaust emission label (example)

The U.S. Environmental Protection Agency (EPA)

exhaust emission label is on top of the rear of the right
valve cover, under the EBP sensor mounting bracket.
The label includes the following:
• Advertised brake horsepower ratings

Figure 1 Engine serial number • Engine model code

• Service applications

The engine serial number is stamped on the • Emission family and control systems
crankcase pad, on the rear left side below the cylinder • Year the engine was certified to meet EPA
head. emission standards

Engine Serial Number Example

6.4HM2YXXXXXXX Engine Accessories

6.4 – Engine displacement (liters) The following engine accessories may have
H – Diesel, turbocharged, air intercooled and manufacturers' labels or identification plates:
electronically controlled • Air compressor
M2 – Motor truck
Y – United States, Huntsville • Air conditioning compressor
7 digit suffix – Sequence number • Alternator
• Cooling fan clutch
• Power steering pump
• Starter motor
Labels or identification plates include information
and specifications helpful to vehicle operators and
technicians.
8 ENGINE SYSTEMS

Engine Description

International® MaxxForce® 7 Features and Specifications

Engine configuration 4 stroke, V8 diesel
Displacement 6.4 liters (389 in3)
Bore (sleeve diameter) 98.2 mm (3.87 in.)
Stroke 105 mm (4.134 in.)
Compression ratio 17.5:1
Aspiration Variable Geometry Turbocharger (VGT) and Charge Air Cooled
(CAC)
1
Rated power @ rpm 230 hp @ 2300 rpm
1
Peak torque @ rpm 620 ft·lbs @ 1500 rpm
Engine rotation (facing flywheel) Counterclockwise
Combustion system Direct injection, turbocharged
Fuel system Direct injection common rail
Cooling system capacity (engine only) 10.23 liters (10.8 quarts US)
Lube system capacity (including filter) 17 liters (18 quarts US)
Lube system capacity (overhaul only, with 18.9 liters (19 quarts US)
filter)

Firing order 1-2-7-3-4-5-6-8

1
Initial rating at the time of manual printing, ratings are subject to change for various application. See EPA emission label
for the exact rating for a particular engine.
 ENGINE SYSTEMS 9

Standard Features The Exhaust Gas Recirculation (EGR) system

includes an EGR valve and an intake throttle valve.
The International® MaxxForce® 7 is a V8 engine with
The EGR valve is mounted in an EGR mixer elbow
a displacement of 6.4 liters (389 cubic inches).
that is part of the EGR valve elbow housing. The
The electronic governor controls the engine's rpm intake throttle valve is mounted on the other side of
within a safe and stable operating range for ideal the EGR valve elbow housing in the air stream from
performance. Low idle governor prevents the engine the CAC.
rpm from dropping below a stable speed to prevent
A gerotor lube oil pump is mounted in the front cover
stalling when various loads are demanded on the
and is driven by the crankshaft. Pressurized oil is
engine. High idle governor prevents the engine rpm
supplied to engine components. All MaxxForce® 7
from going above a safe speed that would cause
engines use an engine oil cooler and engine oil filter.
internal damage to the engine.
A closed crankcase breather system draws crankcase
The cylinder heads have four valves per cylinder.
vapors through a breather element. The breather
Each fuel injector is centrally located between the
element separates the vapor and sends it to the air
four valves and directs fuel over the piston bowl for
intake and returns the oil to the crankcase.
improved performance and reduced emissions.
The low-pressure fuel pump draws fuel from the fuel
The camshaft is supported by four bushings pressed
tank(s) through the primary fuel filter. The primary fuel
into the crankcase. The camshaft is crankshaft driven
filter assembly includes a Water in Fuel (WIF) sensor
and thrust is controlled by a plate mounted behind the
and an optional fuel heater. Water and solids are
fourth cam journal.
separated from the fuel and the water is collected in
The overhead valve train includes hydraulic roller cam the water separator bowl. The instrument panel WIF
followers, push rods, rocker arms, and valve bridges lamp is illuminated when water needs to be drained.
to open the dual intake and exhaust valves. A drain valve in the water separator bowl drains water
out. Fuel is discharged to the secondary fuel filter. The
The crankcase is comprised of two major matching
secondary fuel filter assembly is pressure regulated
components. The upper crankcase half houses
and incorporates an air bleed orifice allowing air to be
the cylinders, main bearing saddles, with oil and
automatically purged if it has been introduced to the
coolant passages either cast or machined. The lower
system.
crankcase consists of a structural plate with the main
bearing caps machined into it for improved load The high-pressure fuel system includes a
retention and alignment. High-pressure Fuel Pump (HPFP), high-pressure
common rails, and fuel injectors. The ECM
The crankshaft is supported by five main bearings
electronically controls the injectors allowing multiple
with fore and aft thrust controlled at the upper half of
injections and more precise fuel delivery to improve
the second main bearing. Two connecting rods are
combustion, emissions, and cold start performance.
attached to each crankshaft rod journal and are offset
to minimize vibration. Piston pins are free floating, A hand operated primer pump is mounted on the right
allowing the pins free lateral movement within the valve cover. The manual priming pump draws fuel
connecting rod as well as the piston. Piston pins are from the fuel tank(s) through the primary filter after
held in place with retaining rings. filter replacement or when system has run out of fuel.
This primes the fuel system to minimize the amount of
One piece aluminum-alloy pistons are fitted with
air injected into the system on initial startup.
one keystone ring, one rectangular intermediate
compression ring, and a two piece oil control ring. The Variable Geometry Turbocharger (VGT) has
The combustion bowl is located in the piston crown to actuated vanes in the turbine housing. These vanes
reduce emissions. All pistons are mated to fractured modify exhaust gas flow through the VGT. The ECM
cap joint connecting rods. commands the VGT to control boost pressure for
various engine speeds and load conditions.
The Crankshaft Position (CKP) sensor and Camshaft
Position (CMP) sensor are used by the Electronic The Exhaust Gas Recirculation (EGR) system
Control Module (ECM) to calculate rpm, fuel timing, circulates cooled exhaust into the intake air stream
fuel quantity, and duration of fuel injection. in the intake manifold. This cools the combustion
10 ENGINE SYSTEMS

process and reduces the formation of NOX engine Warmed supply fuel prevents waxing, and improves
emissions. performance and fuel economy during cold weather
start-up.
Diamond Logic® engine control is a single electronic
control unit that monitors and controls the engine and
Chassis Mounted Features
chassis components.
A Charge Air Cooler (CAC) is an air-to-air heat
The glow plug relay controls the eight glow plugs, one
exchanger which increases the density of the air
for each cylinder. The glow plugs warm the cylinders
charge.
during start-up.
The Aftertreatment System processes engine exhaust
Optional Features so that it meets emissions requirements at the tailpipe.
An air compressor is available for applications that • The oxidation catalyst burns oxygen and
require air brakes or air suspension. hydrocarbons in the exhaust stream.
A coolant heater is available to raise the temperature • The DPF captures and burns particulates in the
of the coolant surrounding the cylinders for improved exhaust stream.
performance during cold weather startups.
A fuel heater is available and installed in the primary
fuel filter assembly and warms the supply fuel.
 ENGINE SYSTEMS 11

Engine Component Locations

Figure 3 Front
1. EGR coolant supply tube 6. Engine Coolant Temperature 14. Vibration damper/engine oil
(cooler) (ECT) sensor pump
2. EGR coolant return tube (cooler) 7. Air compressor pulley 15. Oil pressure regulator
3. Intake throttle housing assembly 8. Air compressor belt tensioner 16. Lower oil pan
(ITV) 9. Fan pulley 17. Front crankcase cover
4. Engine Fuel Pressure (EFP) 10. Coolant to secondary radiator 18. Thermostat housing (coolant
sensor 11. Coolant to fuel cooler outlet)
5. Engine Fuel Temperature (EFT) 12. Coolant inlet 19. Belt tensioner
sensor 13. Water pump pulley
12 ENGINE SYSTEMS

Figure 4 Left
1. Air compressor 7. Glow plug harness assembly 12. Coolant-in hose (Coolant supply
2. Injector harness (left) to fuel cooler)
3. Engine Control Module (ECM) 8. Exhaust manifold (left) 13. Coolant-out from fuel cooler
4. Engine 76-pin harness 9. Fuel cooler assembly hose
5. Vehicle 76-pin harness 10. Fuel cooler to filter tube 14. Glow plug harness assembly
6. Valve cover (left) assembly (secondary fuel filter) connector (left)
11. Upper oil pan 15. Oil level gauge tube assembly
 ENGINE SYSTEMS 13

Figure 5 Rear
1. Pump left tube assembly 5. Pump right tube assembly 8. Flywheel assembly
(high-pressure fuel to left fuel (high-pressure fuel to right fuel 9. Fuel drain valve (water and
rail) rail) sediment drain for fuel filter)
2. Left exhaust tube assembly 6. EGR cooler Diesel Oxidation 10. Starter mount (rear cover)
3. Right exhaust tube assembly Catalyst (DOC)
4. Exhaust outlet 7. Crankcase rear cover
14 ENGINE SYSTEMS

Figure 6 Right
1. Exhaust Back Pressure (EBP) 6. Gear driven fuel pump assembly 11. Breather inlet adapter
sensor (low-pressure fuel pump) (crankcase vent)
2. Valve cover (right) 7. Exhaust manifold (right)
3. Fuel primer pump assembly 8. Glow plug harness assembly
4. Primary fuel filter assembly (right)
5. Bowl assembly with fuel 9. EBP tube
heater/probe 10. Glow plug relay
 ENGINE SYSTEMS 15

Figure 7 Top
1. Exhaust Gas Recirculation 6. Oil fill cap 12. Coolant to chassis heater (dual
(EGR) cooler 7. Secondary fuel filter assembly for bus applications)
2. Turbocharger assembly 8. EGR valve assembly 13. Breather assembly (crankcase
3. Exhaust outlet (Turbocharger) 9. Oil filter pressure)
4. VGT actuator 10. Turbocharger air outlet
5. Turbocharger air inlet duct 11. Coolant to chassis heater
16 ENGINE SYSTEMS

Air Management System

Air Management Components and Air Flow

Figure 8 Air Management System (AMS)

 ENGINE SYSTEMS 17

The Air Management System (AMS) includes the If the EGR control valve is open, exhaust gas will mix
following: with filtered intake air and flow into the intake manifold.
If the EGR control valve is closed, only filtered air will
Air filter assembly
flow into the intake manifold.
Intake Air Temperature (IAT) sensor
After combustion, exhaust gas is forced through
Variable Geometry Turbocharger (VGT) assembly the exhaust manifold to the EGR cooler and VGT.
Charge Air Cooler (CAC) Some exhaust gas is cooled in the EGR cooler and
flows through the EGR valve to the EGR valve elbow
Intake Throttle Valve (ITV) housing. When exhaust gas mixes with filtered air
Manifold Air Temperature (MAT) sensor and fuel during the combustion process, this cools
the combustion process and reduces the formation of
Manifold Absolute Pressure (MAP) sensor NOX engine emissions. The rest of the exhaust gas
Intake manifold flows to the VGT when it spins and expands through
the turbine wheel, varying boost pressure. The VGT
Intake valves
compressor wheel is on the same shaft as the turbine
Exhaust Gas Recirculation (EGR) system (EGR wheel and compresses the mixture of filtered air.
valve, EGR cooler, and EGR cooler DOC)
The VGT responds directly to engine loads. During
Exhaust valves heavy load, increased temperature of exhaust turns
Exhaust manifolds the turbine wheel faster. This increased speed turns
the compressor impeller faster and supplies more air
Exhaust Back Pressure (EBP) sensor or greater boost to the intake manifold. Conversely,
Exhaust tubes when engine load is light, the temperature of exhaust
decreases and less air is directed into the intake
Diesel Oxidation Catalyst (DOC) manifold.
Diesel Particulate Filter (DPF)

Charge Air Cooler (CAC)

Air Flow The CAC is mounted on top of the radiator. Air from
the turbocharger passes through a network of heat
Air flows through the air filter assembly and enters
exchanger tubes before entering the EGR valve elbow
the Variable Geometry Turbocharger (VGT). The
housing. Outside air flowing over the CAC cools the
compressor in the VGT increases the pressure,
charged air. Charged air is cooler and denser than the
temperature, and density of the intake air before
air that is not cooled and improves the fuel-to-air ratio
it enters the Charge Air Cooler (CAC). Cooled
during combustion. This results in improved emission
compressed air flows from the CAC into the EGR
control and power output.
valve elbow housing.
18 ENGINE SYSTEMS

Variable Geometry Turbocharger (VGT) Assembly

Figure 9 Turbocharger
1. Turbocharger oil supply tube 3. VGT actuator 5. Exhaust outlet
2. Air inlet 4. Compressor outlet 6. Exhaust inlet

The VGT has actuated vanes in its turbine housing. VGT closed loop system
The vanes modify flow characteristics of exhaust
gases through the turbine housing. The benefit is the
ability to control boost pressure for various engine
speeds and load conditions. An additional benefit is
lower emissions.

Figure 10 VGT closed loop system

The VGT is a closed loop system that uses the

Exhaust Back Pressure (EBP) sensor to provide
feedback to the ECM. The ECM uses the EBP sensor
to continuously monitor EBP and adjust the duty cycle
to the VGT to match engine requirements.
 ENGINE SYSTEMS 19

VGT control Actuator vanes are mounted around the inside

circumference of the turbine housing. An adjusting
ring links all the vanes. When the adjusting ring
moves, all vanes move to the same position. The
adjusting ring is connected to the VGT actuator
through a vane operating lever. The actuator receives
a signal from the ECM. The actuator moves the valve
operating lever that moves the unison ring based
on the increase or decrease of the exhaust back
pressure.
Exhaust gas flow can be regulated depending on
required exhaust back pressure for engine speed and
load.

Figure 11 VGT control

20 ENGINE SYSTEMS

Exhaust Gas Recirculation (EGR) System

Figure 12 EGR system

1. EGR cooler 4. Intake throttle housing assembly
2. EGR valve connector (ITV)
3. EGR valve assembly 5. EGR valve elbow housing

The EGR system includes the following: By mixing exhaust gasses with the inlet air peak
combustion temperature is reduced thus reducing the
• Exhaust tube assembly
formation of NOX emissions.
• EGR cooler
• EGR valve assembly
EGR Flow
• EGR valve control
Some exhaust from the exhaust tube assembly flows
• EGR valve elbow housing through a Diesel Oxidation Catalyst (DOC) into the
EGR cooler. Exhaust from the EGR cooler flows into
• ITV assembly
the EGR valve elbow housing, through the EGR valve,
The EGR system reduces Nitrogen Oxide (NOX) and into the intake manifold.
emissions. The EGR system is also used to adjust
When EGR is required, the EGR valve opens, allowing
the fuel to air ratio for regeneration.
cooled exhaust gases to enter the intake manifold to
NOX gas forms during a reaction between nitrogen be mixed with filtered intake air. The exhaust gases
and oxygen at the high temperatures of combustion. are then recycled through the combustion process.
 ENGINE SYSTEMS 21

EGR Valve

Figure 14 EGR closed loop operation

Figure 13 EGR valve

1. DC motor
2. Connector
3. Coolant return
4. Poppet valve assembly

The EGR valve uses a DC motor to control the position

of the valve assembly. The motor drives the poppet
valve assembly at the same time it drives the position
sensor. The poppet valve assembly has two valve
heads (poppets) on a common shaft.
Exhaust flow enters the EGR valve elbow housing and Figure 15 EGR control
enters the EGR valve. Exhaust flows through the two
valve poppets into the intake mixer where it mixes with
incoming air from the air inlet throttle valve. The mixed The EGR valve consists of two major components; a
air goes into the intake manifold and cylinders. valve body and an actuator motor. The valve has a
Hall effect position sensor to monitor valve movement.
The EGR valve is located at the front of the engine in
the EGR valve elbow housing.
The EGR motor receives the desired EGR position
from the ECM to position the valve for exhaust gas
recirculation. The EGR position sensor provides
feedback to the ECM on the valve position.
22 ENGINE SYSTEMS

Intake Throttle Valve (ITV) The sensors measure temperature and pressure at
the center of the exhaust flow.
The ECM monitors the aftertreatment system.
The ECM controls the intake throttle valve during
aftertreatment regeneration and purge.
Diesel Oxidation Catalyst (DOC)
The ITV is controlled to restricts intake air flow.
The DOC does the following:
Restricted air flow will increase exhaust temperature.
• Oxidizes hydrocarbons and carbon monoxide
(CO) in exhaust stream
Aftertreatment (AFT) System
• Provides heat for exhaust system warm-up
The AFT System, part of the larger exhaust system,
• Aids in system temperature management for the
processes engine exhaust to meet emissions
DPF
requirements. The AFT system traps particulate
matter (soot) and prevents it from leaving the tailpipe. • Oxidizes NO into NO2 for passive DPF
regeneration

AFT Control System

Diesel Particulate Filter (DPF)
The control system performs the following functions:
The DPF does the following:
• Monitors exhaust gases and aftertreatment
system, and controls engine operating • Captures and temporarily stores carbon-based
parameters for emission processing and failure particulates in a filter
recognition
• Allows for oxidation (regeneration) of stored
• Cancels regeneration in the event of catalyst or particulates once loading gets to a particular level
sensor failure (pressure drop)
• Monitors the level of soot accumulation in the • Provides the required exhaust back pressure drop
Diesel Particulate Filter (DPF) and adapts engine for engine performance
operating characteristics to compensate for
• Stores noncombustible ash
increased back pressure
• Controls engine operating parameters to make
regeneration automatic. AFT Conditions and Responses
• Maintains vehicle and engine performance during The operator is alerted audibly or with instrument
regeneration panel indicators of system status. Automatic or
manual regeneration is required when levels of soot
exceed acceptable limits. For additional information
Sensors see the applicable vehicle Operator's Manual and the
vehicle visor placard.
Sensors produce a representative electronic signal
based on temperature and pressure. It is used by the
control system to regulate the after treatment function.
 ENGINE SYSTEMS 23

Fuel System
Fuel System Components

Figure 16 Fuel system schematic

24 ENGINE SYSTEMS

Figure 17 High-pressure fuel system

1. Pump left tube assembly 5. High-pressure Fuel Pump 9. Fuel rail to injector fuel tube
(pump-to-rail) (HPFP) assembly ports (4 for each rail)
2. Left rail assembly 6. Pump right tube assembly 10. HPFP gear
3. Pump return tube connection (pump-to-rail)
(pump-to-cooler) 7. Right rail assembly
4. Filter to pump tube connection 8. Fuel Rail Pressure (FRP) sensor
(pump-to-secondary fuel filter) port
 ENGINE SYSTEMS 25

Figure 18 Low-pressure fuel system

1. Diagnostic coupling assembly 6. Fuel cooler assembly 9. Fuel supply to filter
2. Filter to pump tube 7. Fuel cooler to filter tube tube (low-pressure fuel
assembly (high-pressure assembly (cooler-to-secondary pump-to-secondary fuel filter)
pump-to-secondary fuel filter) fuel filter) 10. Engine Fuel Pressure (EFP)
3. High-pressure pump to cooler 8. Fuel return to tank tube sensor (optional)
tube assembly assembly (secondary fuel 11. Engine Fuel Temperature (EFT)
4. Injector leak off check valve filter-to-fuel tank) sensor
5. Injector return tube assembly
26 ENGINE SYSTEMS

Figure 19 Low-pressure fuel supply system

1. Fuel primer pump assembly 5. Fuel supply tube assembly 8. Primary filter element assembly
2. Fuel supply tube assembly (low-pressure fuel 9. Fuel filter primary header
3. Fuel return from primer tube pump-to-secondary fuel filter) 10. Fuel from tank
assembly 6. Fuel drain valve (water and 11. Primary filter to pump tube
4. Fuel return tube assembly sediment drain for fuel filter) assembly
(secondary fuel filter-to-fuel 7. Bowl assembly with fuel 12. Gear driven fuel pump assembly
tank) heater/probe (optional) (low-pressure fuel pump)
 ENGINE SYSTEMS 27

The fuel system includes the following: an internal drilled air bleed orifice to automatically
remove air from the fuel. The filtered fuel is mixed with
• Low-pressure fuel system
the cooled fuel from the fuel cooler and is directed to
• Low-pressure fuel pump assembly a four micron secondary filter. Pressure is maintained
by an internal pressure regulator.
• Primary fuel filter assembly
Fuel is additionally filtered in the second stage filter
• Secondary fuel filter assembly
and is directed to the high-pressure fuel pump. This
• Fuel cooler assembly second stage filter also has an internal drilled air bleed
orifice to automatically remove air from the fuel.
• Fuel primer pump assembly
Fuel from the pressure regulator and both air bleed
• High-pressure fuel system
orifices return to the fuel tank(s) through a check valve
• High-pressure Fuel Pump (HPFP) assembly that maintains constant back pressure in the bleed
header.
• High-pressure fuel rails assemblies (left and
right) The secondary fuel filter assembly has a temperature
sensor mounted in the supply line to the HPFP.
• Fuel injector assemblies (8)
Fuel cooler
Low-pressure Fuel System
The fuel from the fuel injectors and the HPFP flows
through the fuel cooler where it is cooled by the
Low-pressure fuel pump
secondary radiator. Cooled fuel is then directed to
The low-pressure fuel pump draws fuel from the fuel the secondary fuel filter assembly.
tank(s) through the primary fuel filter and supplies fuel
to the secondary fuel filter. It is mounted on the right
side of the flywheel housing and driven through idler High-pressure Fuel System
gears by the crankshaft.
High-pressure Fuel Pump (HPFP) assembly
Primary fuel filter assembly
The HPFP is a three piston volumetric pump that
The primary filter removes water and filters fuel supplies fuel at high pressure to both the fuel rails.
from the fuel tank(s). It is mounted in front of the The HPFP is mounted in the rear valley on top of the
low-pressure fuel pump. engine and driven by the camshaft.

Fuel primer pump Internal Transfer Pump (ITP)

The manual priming pump draws fuel from the The ITP is part of the HPFP assembly and driven
fuel tank(s) through the primary filter after filter off the same shaft as the HPFP assembly. The ITP
replacement or when the fuel system has run out supplies fuel at a slightly higher pressure and flow
of fuel. This primes the fuel system to minimize to the Fuel Volume Control Valve (FVCV). Cooling
the amount of air injected into the system on initial flow for the ITP is provided by routing fuel back to
startup. the suction side of the transfer pump. The discharge
of the ITP has an orifice and check valve that also
Secondary fuel filter assembly provides additional cooling for the ITP by routing flow
to the fuel cooler.
The secondary fuel filter assembly is a two stage filter
with an internal pressure regulator mounted adjacent
Fuel Volume Control Valve (FVCV)
to the oil filter.
The FVCV regulates the volume of flow sent to the
An internal pressure relief valve maintains a constant
HPFP. The FVCV is located in the HPFP assembly
pressure throughout the low-pressure system.
and controlled by the FRP via the ECM. The FVCV
A five micron first stage filter filters fuel from the puts the necessary quantity of fuel under pressure to
low-pressure fuel pump. The first stage filter has the HPFP.
28 ENGINE SYSTEMS

FVCV control depends on engine speed, injector and a late post-injection cycle. The pre-injection
quantity, fuel temperature, and the number of cycles and post-injection cycle reduce combustion
injections per cycle. noise, mechanical load, and exhaust emissions.
The main-injection cycle injects and atomizes fuel
Fuel Pressure Control Valve (FPCV) in the combustion chambers for combustion. The
late post-injection cycle adds fuel to the exhaust to
The FPCV controls the fuel pressure to the fuel rails.
regenerate the aftertreatment system.
The FPCV is located in the HPFP assembly and is
controlled by the FRP via the ECM. FPCV control Each injector has an actuator that opens or closes
depends on fuel pressure and fuel temperature. the injector nozzle. Charging the actuator opens
the nozzle. The nozzle is closed by discharging the
Fuel Rail Pressure (FRP) sensor actuator. The ECM charges and discharges each
actuator by energizing the appropriate high side or
The FRP monitors the fuel pressure in the fuel rails
low side output. The low side output supplies a return
and sends a signal to the ECM. It is located in the right
circuit for each actuator.
fuel rail. The FRP sensor harness is routed through
the right Under Valve Cover (UVC) harness along with
Fault Detection/Management
the fuel injector connections.
The ECM can detect if the output is shorted to
ground/battery detection, the output is open, or if the
High-pressure Piezo Common Rail (HPCR)
injector is shorted.
System
The HPFP pumps fuel through separate tubes to each
fuel rail. Each fuel rail has four fuel tubes, one for Return Fuel System
each injector, that maintain constant pressure from the
The return fuel system moves unused fuel from the
high-pressure pump to each injector.
fuel injectors to the fuel cooler. Excess fuel out of
The injectors operate in five cycles; two pre-injection the FVCV and the FPCV mix with fuel from the fuel
cycles, a main-injection cycle, a post-injection cycle, injectors on the way to the fuel cooler.
 ENGINE SYSTEMS 29

Engine Lubrication System

Lubrication System Components and Oil Flow

Figure 20 Lubricating system schematic

Oil Flow • Oil filter base assembly

The lubrication system includes: • Engine Oil Pressure (EOP) sensor
• Oil pan assemblies • Engine Oil Temperature (EOT) sensor
• Gerotor oil pump • Piston cooling tube
• Front crankcase cover • Lifters
• Oil pressure regulator valve • Push rods
• Crankcase assembly The lubrication system is pressure regulated, full flow
cooled, and full flow filtered.
• Oil cooler cover assembly
30 ENGINE SYSTEMS

A gerotor oil pump draws oil from the oil pan through crankshaft drives the inner rotor gear of the gerotor
an oil pickup tube. Oil then flows through passages in pump.
the lower crankcase, front cover, and in the oil pump
Oil pressure is maintained by the pressure regulating
housing to the gerotor oil pump.
valve assembly. The pressure regulating valve in the
The gerotor oil pump includes the oil pump housing discharge oil flow relieves excess oil pressure back to
and cover, gerotor assembly (inner and outer gears), the suction side of the gerotor oil pump.
and the pressure regulating valve assembly. The
 ENGINE SYSTEMS 31

Figure 21 Oil cooler cover and oil filter base location details
1. Unfiltered oil flow from pump 7. Coolant outlet to cooling system 13. Oil cooler bypass valve
2. Oil cooler outlet (oil) 8. Oil drain valve assembly 14. Turbocharger oil supply port
3. Filtered oil to crankcase galleries 9. Diagnostic coupling assembly 15. Filter inlet check valve
and other components 10. Diagnostic coupling dust cap 16. Coolant outlet from oil cooler
4. Filtered oil to crankcase galleries 11. Engine Oil Temperature (EOT) 17. Oil cooler inlet (oil)
and other components sensor port 18. Oil drain to sump
5. Coolant inlet to oil cooler 12. Engine Oil Pressure (EOP)
6. Coolant inlet from water pump sensor port

Pressurized oil from the pump flows through passages valve in the oil filter return line opens. Oil bypasses
in the oil pump housing and upper crankcase to the oil the oil filter element and flows to the oil filter base.
cooler cover. Oil flows through plates in the cooler, is Both bypass valves ensure full flow of oil to the engine
cooled, and then flows back to the oil cooler cover. if the filter or cooler is restricted. The oil filter base
directs filtered oil to the oil supply tube to lubricate the
If the oil cooler is restricted, a bypass valve in the oil
turbocharger, EOP sensor, EOT sensor, diagnostic
filter base opens, oil bypasses the oil cooler, and flows
port, and oil cooler cover. Lubricating oil from the
to the oil filter base.
turbocharger drains back to the oil pan. When the oil
Oil flows through the oil filter base to the oil filter filter is removed, oil flows through a drain valve in the
element. If the oil filter element is restricted, a bypass oil filter base back to the oil pan.
32 ENGINE SYSTEMS

Cooling System
Cooling System Components and Flow

Figure 22 Cooling system schematic

The cooling system keeps the engine within a Front Crankcase Cover Flow
designated temperature range.
Pressurized coolant from the water pump flows
through the coolant supply housing in the front cover.
Water Pump Flow is directed through passages in the crankcase
and ports in the front cover to support cooling system
The centrifugal water pump is mounted in the front requirements.
crankcase cover. The water pump has a built in
reservoir to catch small amounts of coolant that • Two passages (left and right) direct coolant
may seep past the seal. Water pump rotation is through the crankcase (front to rear) to cool the
counter-clockwise when viewed from the front of the cylinder walls (combustion chamber) and then
engine. directed at the rear of the crankcase up to the
cylinder heads.
If the dual thermostats are shut, coolant is circulated
through an internal bypass in one of the thermostats. • A passage directs coolant from the front cover
and through the crankcase to the oil cooler to cool
The surge tank keeps the system full with a line to the lubricating oil.
suction of the water pump.
 ENGINE SYSTEMS 33

• A port in the front cover directs coolant through thermostat opening temperature, coolant flows to the
tubing to the EGR cooler to cool the exhaust radiator to be cooled. If the coolant temperature is
gasses. below the opening temperature for both thermostats,
both thermostats are closed. Coolant returns
• A port in the front cover directs coolant through
back to the water pump through a bypass on one
tubing to the brake air compressor.
of the thermostats. As the coolant temperature
• A port in the front cover directs coolant through increases, the first thermostat starts to open and flow
a secondary radiator to the fuel cooler, to cool starts through the radiator. As coolant temperature
unused fuel from the injectors. continues to increase, the first thermostat will fully
open. The second thermostat will then start to open,
Hot coolant return flow is directed through passages
increasing flow to the radiator until both thermostats
in the crankcase and ports in the front cover to the
are fully open.
coolant return cross over housing.
• Two passages (left and right) through the Deaeration Tank
crankcase return coolant from the cylinder heads.
The radiator and the coolant system are kept full and
• A passage through the crankcase returns coolant pressurized by the deaeration tank. As coolant in
from the oil cooler. the radiator heats up and expands, the level in the
deaeration tank goes up and pressure increases. The
• A port in the coolant return cross over housing
deaeration tank also removes air from the cooling
returns coolant through tubing from the brake air
system.
compressor.
• A port in the coolant return cross over housing Radiator Shutters
returns coolant through tubing from the EGR
Closing the radiator shutters will keep the engine
cooler.
warm during cold weather operation. This provides
• A port in the coolant return cross over housing faster warm up of the passenger cab and faster
returns coolant through tubing from the fuel windshield defrosting.
cooler.
Fuel Coolant Valve (FCV)
The coolant return housing has one temperature
sensor point. The FCV is used to redirect coolant through the fuel
cooler. The ECM uses the Engine Fuel Temperature
The EGR cooler supplies coolant to the heater core
(EFT) sensor to monitor fuel temperature and controls
for cab heating.
the FCV to maintain the desired fuel temperature. The
The coolant return cross over housing directs coolant valve opens automatically allowing coolant to pass
to the dual thermostat housing. through the cooler. The ECM controls this valve in
cold weather to warm the fuel and also prevents the
Thermostats temperature from getting too hot.
Two thermostats are located in the thermostat
housing. If the coolant temperature is above the
34 ENGINE SYSTEMS

Electronic Control System

Electronic Control System Components

Figure 23 Electronic Control System

Operation and Function Reference Voltage (VREF)

The Electronic Control Module (ECM) monitors and The ECM supplies a 5 volt VREF signal to input
controls the engine to ensure maximum performance sensors in the electronic control system. By
and adherence to emissions standards. The ECM has comparing the 5 volt VREF signal sent to the sensors
four primary functions: with their respective returned signals, the ECM
determines pressures, positions, and other variables
• Provides Reference Voltage (VREF)
important to engine and vehicle functions.
• Conditions input signals
The ECM supplies three independent circuits for
• Processes and stores control strategies VREF:
• Controls actuators • VREF supplies 5 volts to engine sensors
 ENGINE SYSTEMS 35

• VREF supplies 5 volts to vehicle aftertreatment physical silicon or was burnt in with a one time
programming. In ROM, the program is fixed and to
• VREF supplies 5 volts to fuel injector control
change it you physically have to change the hardware.
With Flash memory, you can keep reprogramming it.
Flash memory is used to update vehicles in the field
Signal Conditioner
(over public CAN) with new calibrations, software bug
The signal conditioner in the internal microprocessor fixes, or new features.
converts analog signals to digital signals, squares up
Flash memory includes the following:
sine wave signals, or amplifies low intensity signals to
a level that the ECM microprocessor can process. • Vehicle configuration, modes of operation, and
options
• Engine Family Rating Code (EFRC)
Microprocessor
• Engine warning and protection modes
The ECM microprocessor stores operating
instructions (control strategies) and value tables
(calibration parameters). The ECM compares stored
RAM
instructions and values with conditioned input values
to determine the correct operating strategy for all RAM stores temporary information for current engine
engine operations. conditions. Temporary information in RAM is lost
when the ignition switch is turned to OFF or when
Continuous calculations in the ECM occur at
ECM power is interrupted. RAM information includes
two different levels or speeds: Foreground and
the following:
Background.
• Engine temperature
• Foreground calculations are faster than
background calculations and are normally more • Engine rpm
critical for engine operation. Engine speed control
• Accelerator pedal position
is an example.
• Background calculations are normally variables
that change at slower rates. Engine temperature Actuator Control
is an example.
The ECM controls the actuators by applying a low
Diagnostic Trouble Codes (DTCs) are set by the level signal (low side driver) or a high level signal (high
microprocessor if inputs or conditions do not comply side driver). When switched on, both drivers complete
with expected values. a ground or power circuit to an actuator.
Diagnostic strategies are also programmed into the Actuators are controlled in three ways, determined by
ECM. Some strategies monitor inputs continuously the kind of actuator.
and command the necessary outputs for correct
• A duty cycle (percent time on/off)
performance of the engine.
• A controlled pulse width
• Switched on or off
Microprocessor memory
The ECM microprocessor includes Flash Memory and
Random Access Memory (RAM). Actuators
The ECM controls engine operation with the following:
Flash Memory • EGR valve and control
Flash memory is a non-volatile form of memory that • VGT control
is electrically erasable and re-programmable. ROM
• Intake throttle control and throttle position
(Read only memory) was used when the program
(control strategy and calibration) was built into the • Glow plug relay
36 ENGINE SYSTEMS

H-bridge Circuit (ITVH) circuit high. When driving the ITVH high, this
causes Intake Throttle Valve Low (ITVL) circuit to go
The EGR valve and ITV actuator motors are operated
low.
by an H-bridge (by-polar) circuit in each valve
assembly. Variable voltage is needed to move the valve and
minimal voltage is needed to maintain its position.
An H-bridge circuit operates like putting a power
source on one side of a motor and hooking the other
side of the motor to a ground. This turns the motor. Glow Plug Relay
By shifting the leads on the motor it will turn in the
opposite direction. The ECM activates the glow plug relay. The relay
delivers VBAT to the glow plugs for up to 120 seconds,
To control the motor in both forward and reverse depending on engine coolant temperature and
with a processor, you will need an H-Bridge. Relays altitude. The ground circuit is supplied directly from
configured in this fashion make an H-Bridge. The the battery ground at all times. Relay is controlled by
"high side drivers" are the relays that control the switching on a voltage source from the ECM.
positive voltage to the motor. This is called sourcing
current. The "low side drivers" are the relays that
control the negative voltage to sink current to the Engine and Vehicle Sensors
motor. "Sinking current" is the term for connecting the
Thermistor Sensors
circuit to the negative side of the power supply, which
is usually ground.

Exhaust Gas Recirculation (EGR) Valve and

Control
The EGR valve controls the flow of exhaust gases to
the intake manifold. The EGR valve is integrated with
an EGRP sensor.
The ECM controls the EGR valve with a Pulse Width
Modulation (PWM) signal through H-bridge circuitry.
The ECM controls motor speed using PWM. The EGR
is closed by driving the Exhaust Gas Recirculating Figure 24 Thermistor sensors
High (EGRH) circuit high. When driving the EGRH
high, this causes Exhaust Gas Recirculating Low
A thermistor sensor changes its electrical resistance
(EGRL) circuit to go low.
with changes in temperature. Resistance in the
Variable voltage is needed to move the valve and thermistor decreases as temperature increases, and
minimal voltage is needed to maintain its position. increases as temperature decreases. Thermistors
work with a resistor that limits current in the ECM to
form a voltage signal matched with a temperature
Intake Throttle Valve (ITV) Actuator and Position value.
Sensor
The top half of the voltage divider limits current inside
The ITV is used to control air/fuel mixture during a the ECM. A thermistor sensor has two electrical
regeneration process of the aftertreatment system. connectors, signal return and ground. The output of
The ITV is also used to insure a smooth engine shut a thermistor sensor is a nonlinear analog signal.
down by restricting air flow to the engine at shut down.
Thermistor Sensors
The ECM controls the ITV with a Pulse Width
• Engine Coolant Temperature (ECT) Sensor
Modulation (PWM) signal through H-bridge circuitry.
• Engine Oil Temperature (EOT) Sensor
The ECM controls motor speed using PWM. The
ITV is close by driving the Intake Throttle Valve High • Engine Fuel Temperature (EFT) Sensor
 ENGINE SYSTEMS 37

• Manifold Air Temperature (MAT) Sensor NOTE: For specific information and location see
applicable sensor in the “Electronic Control Systems
• Intake Air Temperature (IAT) Sensor
Diagnostics” section of EGES-350-1 MaxxForce® 7
NOTE: For specific information and location see Engine Diagnostics Manual.
applicable sensor in the “Electronic Control Systems
Micro Strain Gauge (MSG) Sensor
Diagnostics” section of EGES-350-1 MaxxForce® 7
Engine Diagnostics Manual.
Variable Capacitance Sensors

Figure 25 Variable capacitance sensors

Figure 26 MSG sensor

Variable capacitance sensors measure pressure. The

pressure measured is applied to a ceramic material. A Micro Strain Gauge (MSG) sensor measures
The pressure forces the ceramic material closer to a pressure. Pressure to be measured exerts force on
thin metal disk. This action changes the capacitance a pressure vessel that stretches and compresses
of the sensor. to change resistance of strain gauges bonded to
the surface of the pressure vessel. Internal sensor
The sensor is connected to the ECM by three wires:
electronics convert the changes in resistance to a
• VREF ratiometric voltage output.
• Signal The sensor is connected to the ECM by three wires:
• Signal return (ground) (SIG GND) • VREF
The sensor receives the VREF and returns an analog • Signal
signal voltage to the ECM. The ECM compares the
• Signal return (ground) (SIG GND)
voltage with pre-programmed values to determine
pressure. The sensor is powered by VREF received from the
ECM and is grounded through the ECM to a common
The operational range of a variable capacitance
sensor ground.
sensor is linked to the thickness of the ceramic disk.
The thicker the ceramic disk the more pressure the MSG Sensors
sensor can measure.
• Fuel Rail Pressure (FRP) sensor
Variable Capacitance Sensors
NOTE: For specific information and location see
• Exhaust Back Pressure (EBP) Sensor applicable sensor in the “Electronic Control Systems
Diagnostics” section of EGES-350-1 MaxxForce®
• Manifold Absolute Pressure (MAP) Sensor
7Engine Diagnostics Manual.
• Engine Oil Pressure (EOP) Sensor
• Engine Fuel Pressure (EFP) Sensor
38 ENGINE SYSTEMS

Magnetic Pickup Sensors Potentiometer

Figure 27 Magnetic pickup sensors

Figure 28 Potentiometer
A magnetic pickup sensor generates an alternating
frequency that indicates speed. Magnetic pickups
A potentiometer is a variable voltage divider that
have a two wire connection for signal and ground.
senses the position of a mechanical component.
This sensor has a permanent magnetic core
A reference voltage is applied to one end of
surrounded by a wire coil. The signal frequency is
the potentiometer. Mechanical rotary or linear
generated by the rotation of gear teeth that disturb
motion moves the wiper along the resistance
the magnetic field.
material, changing voltage at each point. Voltage is
Magnetic Pickup Sensors proportional to the amount of mechanical movement.
• Crankshaft Position (CKP) Sensor Potentiometer
• Camshaft Position (CMP) Sensor • Accelerator Position Sensor (APS)
NOTE: For specific information and location see NOTE: For specific information and location see
applicable sensor in the “Electronic Control Systems applicable sensor in the “Electronic Control Systems
Diagnostics” section of EGES-350-1 MaxxForce® 7 Diagnostics” section of EGES-350-1 MaxxForce® 7
Engine Diagnostics Manual. Engine Diagnostics Manual.
 ENGINE SYSTEMS 39

Switches Switches indicate position or condition. They operate

open or closed, regulating the flow of current. A switch
can be a voltage input switch or a grounding switch. A
voltage input switch supplies the ECM with a voltage
when it is closed. A grounding switch grounds the
circuit when closed, causing a zero voltage signal.
Grounding switches are usually installed in series with
a current limiting resistor.
Switches
• Engine Coolant Level (ECL) Switch
NOTE: For specific information and location see
applicable sensor in the “Electronic Control Systems
Diagnostics” section of EGES-350-1 MaxxForce® 7
Engine Diagnostics Manual.

Figure 29 Switch
40 ENGINE SYSTEMS

Glow Plug Control System

Figure 30 Glow plug control system

The glow plug control system warms the engine (0 to 10 seconds) ON-time is independent from the
cylinders to aid cold engine starting and reduce glow plugs (0 to 120 seconds) ON-time.
exhaust emissions during warm-up.
The ECM controls the wait to start lamp through public
The ECM energizes the glow plug relay while CAN communication to the electronic gauge cluster.
monitoring programmed conditions for engine coolant
The power is supplied to the switch side of the relay
temperature and atmospheric pressure.
from the starter motor through a fusible link. When the
The ECM controls the wait to start lamp and glow relay is energized, power is supplied to the glow plugs,
plugs based on ECT and EOT. The wait to start lamp which are grounded through the cylinder heads.
 MOUNTING ENGINE ON STAND 41

Table of Contents

Mounting Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

42 MOUNTING ENGINE ON STAND
 MOUNTING ENGINE ON STAND 43

Mounting Engine

GOVERNMENT REGULATION: Engine

fluids (oil, fuel, and coolant) may be a hazard
to human health and the environment.
Handle all fluids and other contaminated
materials (e.g. filters, rags) in accordance
with applicable regulations. Recycle
or dispose of engine fluids, filters, and
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or Figure 31 Left side coolant drain plug
death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing
diagnostic or service procedures.

WARNING: To prevent personal injury

or death, remove ground cable from negative
terminal of main battery before disconnecting
or connecting electrical components. Always
connect ground cable last.

WARNING: To prevent personal injury or Figure 32 Right side coolant drain plug
death, read all safety instructions in the “Safety
Information” section of this manual. 2. Remove two coolant drain plugs and drain coolant
NOTE: Before mounting engine on engine stand, from crankcase into a suitable container. Coolant
complete steps 1 through 6. drain plugs are in rear of crankcase, below
exhaust manifolds.
1. Remove primary fuel filter assembly (page 139).
WARNING: To prevent personal injury or
death, dispose of oil or discard components,
according to applicable regulations.
3. Remove oil pan drain plug and drain oil into a
suitable container.
NOTE: Lubricate oil pan drain plug O-ring with clean
engine oil.
4. After fluids are drained from engine, reinstall
plugs.
44 MOUNTING ENGINE ON STAND

5. Tighten oil pan drain plug to special torque (page NOTE: See manufacturer's safety instructions
45). (included with engine lift stand and Engine Stand
Mounting Bracket).
WARNING: To prevent personal injury or
death, make sure the engine is supported before
removing mounting hardware.

WARNING: To prevent personal injury or

death, use a chain hoist rated for the weight of
the engine, follow manufacturer's installation and
safety instructions, and attach safety latch lifting
hooks to lifting eyes on the engine.
6. Attach hoist hook lifting bracket to engine lifting
eyes. Use safety catches on hoist hooks when
lifting engine.

Figure 34 Mounting bolts for Engine Stand

Mounting Bracket
1. M10 x 30 class 10.9 mounting bolts (4) to engine
block
2. Grade 8 or class 10.9 mounting bolts (4) to engine
lift stand

7. Position Engine Stand Mounting Bracket (page

45) on right side of engine. Secure bracket plate
with four M10 x 30 class 10.9 mounting bolts and
washers. Tighten bolts to standard torque (page
383).
Figure 33 Engine Stand Mounting Bracket
8. Mount engine on engine lift stand using four grade
8 or class 10.9 mounting bolts.

WARNING: To prevent personal injury or

death, use only grade 8 or class 10.9 bolts to
secure Engine Stand Mounting Bracket to engine
and engine lift stand.
 MOUNTING ENGINE ON STAND 45

Special Torque
Table 2 Mounting Engine on Stand
Crankcase coolant drain plugs 20 N·m (15 lbf·ft)
Oil pan drain plug 44 N·m (32 lbf·ft)

Special Service Tools

Table 3 Mounting Engine on Stand

Description Tool Number
Engine Stand Mounting Bracket ZTSE4507
46 MOUNTING ENGINE ON STAND
 ENGINE ELECTRICAL 47

Table of Contents

Engine Electronic Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Description of Engine Sensors, Valves, and Actuators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Crankshaft Position (CKP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Camshaft Position (CMP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Exhaust Back Pressure (EBP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Engine Coolant Temperature (ECT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Engine Oil Temperature (EOT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Engine Oil Pressure (EOP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Engine Fuel Pressure (EFP) Sensor (optional). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Engine Fuel Temperature (EFT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Water in Fuel (WIF) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Fuel Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Manifold Air Temperature (MAT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Manifold Absolute Pressure (MAP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Intake Throttle Valve (ITV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Fuel Rail Pressure (FRP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Exhaust Gas Recirculation (EGR) Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Variable Geometry Turbocharger (VGT) Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Crankshaft Position (CKP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Camshaft Position (CMP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Exhaust Back Pressure (EBP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Engine Coolant Temperature (ECT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Engine Oil Temperature (EOT) Sensor and Engine Oil Pressure (EOP) Sensor. . . . . . . . . . . . . . . . . . . .59
Engine Fuel Temperature (EFT) Sensor and Engine Fuel Pressure (EFP) Sensor. . . . . . . . . . . . . . . . .60
Water In Fuel (WIF) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Fuel Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Manifold Air Temperature (MAT) Sensor and Manifold Absolute Pressure (MAP) Sensor. . . . . . .61
Intake Throttle Valve (ITV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Exhaust Gas Recirculation (EGR) Valve Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Variable Geometry Turbocharger (VGT) Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Glow Plug Harness Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Glow Plug Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Electronic Control Module (ECM) and Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Under Valve Cover (UVC) Harnesses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Fuel Rail Pressure (FRP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65
Main Engine Wiring Harness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Cleaning and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Main Engine Wiring Harness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Sensors and Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Glow Plug Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Glow Plug Harness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
ECM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
48 ENGINE ELECTRICAL

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Main Engine Wiring Harness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Fuel Rail Pressure (FRP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
Under Valve Cover (UVC) Harnesses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Electronic Control Module (ECM) and Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Glow Plug Relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Glow Plug Harness Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Variable Geometry Turbocharger (VGT) Actuator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Exhaust Gas Recirculating (EGR) Valve Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Intake Throttle Valve (ITV) Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Manifold Air Temperature (MAT) Sensor and Manifold Absolute Pressure (MAP) Sensor. . . . . . .71
Fuel Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Water In Fuel (WIF) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Engine Fuel Temperature (EFT) Sensor and Engine Fuel Pressure (EFP) Sensor. . . . . . . . . . . . . . . . .72
Engine Oil Temperature (EOT) Sensor and Engine Oil Pressure (EOP) Sensor. . . . . . . . . . . . . . . . . . . .73
Engine Coolant Temperature (ECT) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Exhaust Back Pressure (EBP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Camshaft Position (CMP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Crankshaft Position (CKP) Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

 ENGINE ELECTRICAL 49

Engine Electronic Components

Figure 35 Electronic components – Front

1. Engine Fuel Temperature (EFT) 2. Engine Fuel Pressure (EFP) 3. Engine Coolant Temperature
sensor sensor (ECT) sensor
50 ENGINE ELECTRICAL

Figure 36 Electronic components – Left

1. Fuel injector assembly 2. Glow plug 3. Camshaft Position (CMP) sensor
 ENGINE ELECTRICAL 51

Figure 37 Electronic components – Right

1. Glow plug 4. Crankshaft Position (CKP) 6. Bowl assembly with fuel
2. Fuel Rail Pressure (FRP) sensor sensor heater/probe
3. Fuel injector assembly 5. Water In Fuel (WIF) sensor 7. Coolant heater
52 ENGINE ELECTRICAL

Figure 38 Electronic components – Top

1. Intake throttle housing assembly 5. Glow plug relay 9. Manifold Absolute Pressure
2. Exhaust Gas Recirculating 6. Exhaust Back Pressure (EBP) (MAP) sensor
(EGR) valve sensor 10. Manifold Air Temperature (MAT)
3. Engine Oil Temperature (EOT) 7. Electronic Control Module sensor
sensor (ECM)
4. Engine Oil Pressure (EOP) 8. Variable Geometry Turbocharger
sensor (VGT) actuator
 ENGINE ELECTRICAL 53

Description of Engine Sensors, Camshaft Position (CMP) Sensor

Valves, and Actuators
NOTE: See the following publications for information
on diagnostics and troubleshooting:
• EGES-350-1 MaxxForce® 7 Engine Diagnostic
Manual
• EGED-355-1 MaxxForce® 7 Hard Start/No Start
and Performance Diagnostic Form
• EGED-365 MaxxForce® 7 Electronic Control
System Diagnostic Form Figure 40 CMP sensor
Crankshaft Position (CKP) Sensor
The CMP sensor is a magnetic pickup sensor
that provides the ECM with a signal that indicates
camshaft position. As the cam rotates, the sensor
identifies the position of the cam by locating a peg on
the cam. The CMP sensor is installed in the front left
side of the lower crankcase.
NOTE: When ordering this sensor, make sure the
sensor is the same one pictured. This sensor is used
in different Navistar applications to sense crankshaft
position.
Exhaust Back Pressure (EBP) Sensor

Figure 39 CKP sensor

The CKP sensor is a magnetic pickup sensor that

provides the Electronic Control Module (ECM) with a
signal that indicates crankshaft speed and position.
As the crankshaft turns, the CKP sensor detects a
60–tooth timing disk on the crankshaft. Teeth 59
and 60 are missing. By comparing the CKP signal
with the Camshaft Position (CMP) signal, the ECM
calculates engine rpm and timing requirements. The Figure 41 EBP sensor
CKP sensor is installed in the front right side of the
lower crankcase.
NOTE: When ordering this sensor, make sure the The EBP sensor is a variable capacitance sensor.
sensor is the same one pictured. This sensor is used The ECM monitors exhaust pressure so that the ECM
in different Navistar applications to sense camshaft can control the Variable Geometry Turbocharger
position. (VGT) actuator, and Exhaust Gas Recirculation (EGR)
systems. The sensor provides feedback to the ECM
for closed loop control of the VGT. The EBP sensor
is installed in the EBP tube assembly, supplied by the
right exhaust tube.
54 ENGINE ELECTRICAL

Engine Coolant Temperature (ECT) Sensor Engine Oil Pressure (EOP) Sensor

Figure 42 ECT sensor

Figure 44 EOP sensor

The ECT sensor is a thermistor sensor. The ECM
monitors the ECT signal and uses this information
for the instrument panel temperature gauge, coolant The EOP sensor is a variable capacitance sensor.
compensation, Engine Warning Protection System The ECM monitors the EOP signal for reference
(EWPS), and glow plug operation. The ECT sensor only. The ECM uses the EOP signal to control the
is installed in the left side of the front cover assembly. instrument panel oil pressure gauge. For Engine
Warning Protection System (EWPS) warning, the
EOP sensor lights the Warn Engine Lamp (WEL) for
Engine Oil Temperature (EOT) Sensor low oil pressure. The EOP sensor closes a circuit
to ground after engine oil pressure reaches 34 to 48
kPa (5 to 7 psi). When the pressure is above 48 kPa
(7 psi) the gauge reads normal. If the oil pressure
drops below 41 kPa (6 psi) the gauge reads 0 kPa (0
psi). The EOP sensor is in the oil filter base assembly
located on top of the engine.

Engine Fuel Pressure (EFP) Sensor (optional)

Figure 43 EOT sensor

The EOT sensor is a thermistor sensor. The ECM

monitors the EOT signal and uses this information
for the instrument panel oil temperature gauge. The
EOT sensor is installed in the oil filter base assembly
located on top of the engine.

Figure 45 EFP sensor

The EFP sensor is a variable capacitance sensor

that measures fuel supply pressure. The EFP sensor
 ENGINE ELECTRICAL 55

provides feedback to the ECM which indicates when of the amber water in fuel lamp. The WIF sensor is
the fuel filter needs to be changed. The EFP sensor installed in the bowl assembly on the lower right side
is installed in the base of the secondary fuel filter on of the engine.
the top of the engine.
Fuel Heater
Engine Fuel Temperature (EFT) Sensor

Figure 46 EFT sensor

The EFT sensor is a thermistor sensor. The ECM

monitors the EFT sensor signal for the high-pressure Figure 48 Bowl assembly with fuel heater/probe
fuel pump Fuel Volume Control Valve (FVCV) control,
Fuel Pressure Control Valve (FPCV) control and
injector timing and control. The EFT sensor is The fuel heater heats incoming fuel to prevent fuel
installed in the outlet of the secondary fuel filter on waxing during cold operating temperatures. The fuel
the top of the engine. heater is thermostatically controlled and turns on and
off at a predetermined temperature. The fuel heater
is part of the bowl assembly on the lower right side of
Water in Fuel (WIF) Sensor the engine, and must be replaced as an assembly.

Manifold Air Temperature (MAT) Sensor

Figure 49 MAT sensor

Figure 47 WIF sensor

The MAT sensor is a thermistor sensor. The ECM
monitors the MAT signal to control injector timing
The WIF sensor is a switch sensor that the ECM uses and fuel rate during cold starts. The ECM also uses
to detect water in the primary fuel filter. The WIF the MAT signal to control Exhaust Gas Recirculation
sensor signal is monitored by the ECM for operation (EGR) valve position and intake throttle control. The
56 ENGINE ELECTRICAL

MAT sensor is mounted in the top left side of the The ITV, a variable position actuator, restricts intake
intake manifold. air flow to help heat the exhaust after treatment
during regeneration. The ITV changes valve position
in response to ECM signals. The ITV contains an
Manifold Absolute Pressure (MAP) Sensor internal position sensor that monitors valve position
and transmits a position signal to the ECM. The ITV
is mounted on the Exhaust Gas Recirculation (EGR)
valve elbow housing on the top front of the engine.

Fuel Rail Pressure (FRP) Sensor

Figure 50 MAP sensor

The MAP sensor is a variable capacitance sensor.

The ECM monitors the MAP signal to determine intake
manifold pressure (boost). This information is used
to control the Exhaust Gas Recirculation (EGR) valve
and determine fueling calculations. The MAP sensor
is installed in the top left side of the intake manifold.
Figure 52 FRP Sensor

Intake Throttle Valve (ITV)

The FRP sensor is a variable capacitance sensor.
The ECM monitors the FRP signal to determine the
Fuel Volume Control Valve (FVCV) and Fuel Pressure
Control Valve (FPCV) operation. The ECM monitors
the FRP signal to determine the fuel injection pressure
for engine operation. The FRP sensor provides
feedback to the ECM for closed loop FRP control.
The FRP sensor is installed in the fuel rail under the
right valve cover.

Figure 51 Intake throttle housing assembly

 ENGINE ELECTRICAL 57

Exhaust Gas Recirculation (EGR) Valve Variable Geometry Turbocharger (VGT) Actuator

Figure 53 EGR Valve Figure 54 VGT actuator

The EGR valve consists of a valve and an actuator The VGT actuator is a variable position actuator that
motor. The actuator motor has a Hall effect position controls turbocharger vane position.
sensor to monitor valve movement.
The VGT actuator is controlled by signals from the
The EGR valve receives the desired EGR position ECM in response to engine speed, required fuel
from the Electronic Control Module (ECM) to activate quantity, boost, exhaust back pressure, and altitude.
the valve for exhaust gas recirculation. The EGR The VGT actuator controls movement of vanes linked
valve provides feedback to the ECM on the valve by an adjusting ring in the turbine housing. Turbine
position. The ECM interprets the feedback signal and exhaust gas flow and VGT boost are modified by vane
sends the command using a pulse width modulated position. The VGT actuator is part of the turbocharger
signal to the actuator motor. assembly, located on the top of the engine.
The closed loop control system uses the EGR position
signal. The EGR valve is located at the front of engine
in the EGR valve elbow housing.
58 ENGINE ELECTRICAL

Removal Crankshaft Position (CKP) Sensor

GOVERNMENT REGULATION: Engine

fluids (oil, fuel, and coolant) may be a hazard
to human health and the environment.
Handle all fluids and other contaminated
materials (e.g. filters, rags) in accordance
with applicable regulations. Recycle
or dispose of engine fluids, filters, and
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the “Safety
Information” section of this manual. Figure 55 CKP sensor

WARNING: To prevent personal injury or

1. Disconnect electrical connector from CKP sensor
death, shift transmission to park or neutral, set
installed in front right side of lower crankcase.
parking brake, and block wheels before doing
diagnostic or service procedures. 2. Remove M6 x 14 bolt from CKP sensor.
3. Remove CKP sensor and discard O-ring.
WARNING: To prevent personal injury
or death, remove ground cable from negative
terminal of main battery before disconnecting Camshaft Position (CMP) Sensor
or connecting electrical components. Always
connect ground cable last.

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

Figure 56 CMP sensor

1. Disconnect engine harness connector from CMP

sensor installed in front left side of crankcase.
2. Remove M6 x 14 bolt from CMP sensor.
3. Remove CMP sensor and discard both O-rings.
 ENGINE ELECTRICAL 59

Exhaust Back Pressure (EBP) Sensor 1. Disconnect electrical connector from ECT sensor
installed in left side of front cover.
2. Remove ECT sensor and discard O-ring.

Engine Oil Temperature (EOT) Sensor and Engine

Oil Pressure (EOP) Sensor

Figure 57 EBP sensor

1. Disconnect electrical connector from EBP sensor

mounted in EBP tube assembly near breather
support on right valve cover.
2. Remove EBP sensor. Figure 59 EOT sensor and EOP sensor
1. EOP sensor
2. EOT sensor
Engine Coolant Temperature (ECT) Sensor

1. Disconnect electrical connectors from EOT

sensor and EOP sensor installed in oil filter base
assembly.
2. Remove EOT sensor and EOP sensor and
discard O-rings.

Figure 58 ECT sensor

60 ENGINE ELECTRICAL

Engine Fuel Temperature (EFT) Sensor and

Engine Fuel Pressure (EFP) Sensor WARNING: To prevent personal injury or
death, store diesel fuel properly in an approved
container designed for and clearly marked DIESEL
FUEL.
1. Drain primary fuel filter into a suitable container.
2. Disconnect electrical connector from WIF sensor.
3. Remove WIF sensor and discard O-ring.

Fuel Heater

Figure 60 EFT sensor and EFP sensor

1. EFT sensor
2. EFP sensor

1. Disconnect electrical connectors from EFT sensor

and EFP sensor installed in secondary fuel filter
base.
2. Remove EFT sensor and EFP sensor and discard
O-rings. Figure 62 Bowl assembly with fuel heater/probe

Water In Fuel (WIF) Sensor

WARNING: To prevent personal injury or
death, store diesel fuel properly in an approved
container designed for and clearly marked DIESEL
FUEL.
NOTE: Fuel heater and bowl assembly must be
replaced as an assembly.
1. Drain primary fuel filter into a suitable container.
2. Disconnect electrical connector from Water In
Fuel (WIF) sensor.
3. Remove WIF sensor and discard O-ring.
4. Disconnect electrical connector from bowl
assembly.
5. Rotate bowl assembly clockwise and remove from
Figure 61 WIF sensor filter element. Use an oil filter wrench if necessary.
6. Remove and discard bowl primary filter seal.
 ENGINE ELECTRICAL 61

Manifold Air Temperature (MAT) Sensor and 1. Disconnect electrical connector from ITV, located
Manifold Absolute Pressure (MAP) Sensor on top front of engine.
2. See Intake Throttle Valve (ITV) and Exhaust Gas
Recirculation (EGR) Valve Elbow Housing (page
87) for removal of ITV.

Exhaust Gas Recirculation (EGR) Valve

Connector

Figure 63 MAT and MAP sensors

1. MAP sensor
2. MAT sensor

1. Disconnect electrical connectors from MAT and

MAP sensors.
Figure 65 EGR valve connector
2. Remove MAT and MAP sensors and discard
O-rings.
1. Disconnect electrical connector from EGR valve.
2. See Exhaust Gas Recirculation (EGR) Valve
Intake Throttle Valve (ITV)
Assembly (page 83) for removal of EGR valve.

Variable Geometry Turbocharger (VGT) Actuator

Figure 64 Intake throttle housing assembly

connector

Figure 66 VGT actuator connector

62 ENGINE ELECTRICAL

1. Disconnect electrical connector from VGT Glow Plug Relay

actuator.

Glow Plug Harness Assemblies

Figure 68 Glow plug relay

1. Glow plug relay nuts
2. Battery (+) cable nut
3. Glow plug harness nut
Figure 67 Glow plug harness assembly (right)
4. Glow plug relay control connector

WARNING: To prevent personal injury

WARNING: To prevent personal injury
or death, remove ground cable from negative
or death, remove ground cable from negative
terminal of main battery before disconnecting
terminal of main battery before disconnecting
or connecting electrical components. Always
or connecting electrical components. Always
connect ground cable last.
connect ground cable last.
1. Disconnect ground (-) cable from battery.
1. Disconnect ground (-) cable from battery.
2. Disconnect glow plug electrical connectors by
2. Remove nut and disconnect battery (+) cable.
releasing connector grommet from valve cover,
then gently pulling connector straight out. 3. Remove nut and disconnect glow plug harness.
3. Disconnect left glow plug harness assembly from 4. Disconnect glow plug relay control electrical
main harness and remove from engine. connector.
4. Disconnect right glow plug harness assembly 5. Remove glow plug relay nuts and relay.
from glow plug relay and remove from engine.

Electronic Control Module (ECM) and Support

1. Disconnect ground (-) cable from battery.
NOTE: The ECM can be removed without removing
support.
 ENGINE ELECTRICAL 63

5. Remove M6 x 16 bolt, M6 nut, and oil level gauge

tube assembly.
6. Unclip main harness retainers from ECM support.

Figure 69 ECM
1. M8 x 45 bolts (4)
2. ECM
3. ECM engine connector
4. ECM chassis connector Figure 70 ECM support
5. ECM injector connector
1. Charging bridge bolt
2. ECM support
3. M6 nuts (5)
2. Disconnect ECM electrical connectors.
3. Remove four M8 x 45 ECM bolts.
7. Remove charging bridge bolt.
4. Remove ECM from support.
8. Remove five M6 nuts and ECM support.
NOTE: Do not remove ECM support if other engine
repairs are not necessary.
64 ENGINE ELECTRICAL

Under Valve Cover (UVC) Harnesses

Figure 71 UVC harnesses

1. Fuel Rail Pressure (FRP) sensor
connector (right UVC harness
only)
2. Fuel injector assembly
connectors (4)

3. Disconnect four electrical connectors from fuel

WARNING: To prevent personal injury injector assemblies using Fuel Injector Electrical
or death, remove ground cable from negative Connector Release Tool (page 75) and FRP
terminal of main battery before disconnecting sensor.
or connecting electrical components. Always
connect ground cable last. 4. Disconnect main harness from UVC harness
connectors.
1. Disconnect ground (-) cable from battery.
5. Disengage UVC harnesses from fuel rails, unclip
2. Remove valve covers (page 221). UVC connectors from cylinder heads, and remove
from engine.
 ENGINE ELECTRICAL 65

Fuel Rail Pressure (FRP) Sensor Main Engine Wiring Harness

WARNING: To prevent personal injury

or death, remove ground cable from negative
terminal of main battery before disconnecting
or connecting electrical components. Always
connect ground cable last.
CAUTION: To prevent engine damage, do not tug on
wiring harnesses; if resistance is felt, find the problem
and free connectors or clips.
NOTE: The electrical harness assembly does not
need to be disconnected from glow plug relay, unless
harness or relay is being replaced. Instead, relay
bolts may be removed from valve cover.
1. Disconnect ground (-) cable from battery.
Figure 72 FRP sensor 2. If not removed, remove Electronic Control Module
(ECM) and support (page 62).
3. Disconnect main harness from sensors.
1. If Under Valve Cover (UVC) harness was not
previously removed, disconnect FRP sensor NOTE: Note routing and attachment points of main
connector. harness for reinstallation.
2. Remove FRP sensor. 4. Remove wiring harness clamps that secure wiring
harness to cylinder heads and front cover.
5. Carefully lift main harness assembly from engine.
66 ENGINE ELECTRICAL

Cleaning and Inspection 2. Remove scale or carbon build up.

Main Engine Wiring Harness 3. Check for body cracks and leakage
1. Carefully inspect wiring harness for worn conduit, 4. If orifices or valves are plugged, replace sensors
frayed insulation or heat damage to wires. Repair or valves.
or replace if necessary.
2. Inspect sensor and valve connectors for cracked
Glow Plug Relay
connector bodies, bent or loose pins, chafing, and
damaged or missing O-rings. Replace connectors NOTE: The glow plug relay is not serviceable beyond
if necessary. cleaning and tightening electrical connections.
3. Inspect each connector for the following Inspect base and relay housing for damage, loose
conditions and replace, if necessary: terminals, stripped threads, and cracks.
• Corroded connectors and green, gray, or
white deposits on metal terminals.
Glow Plug Harness
• Terminals incorrectly latched in connector
1. Inspect harness assemblies for right and left
body or pushed back relative to other
glow plugs for defective or twisted seals and pin
terminals in same connector.
receptors that are spread open.
• Make sure that each connector has its seals
2. Clean glow plug harness assemblies with a shop
in place. During disassembly, a seal may
towel. Do not use solvents. Inspect glow plug
pull off of its connector and remain in mating
harness for missing or damaged seals. Replace
socket of a sensor or actuator. A connector
if necessary.
assembled without the correct seals can
be contaminated with moisture and have
corroded terminals, causing a poor electrical
ECM
connection.
1. Inspect rubber seal on harness connector and in
4. Check engine wiring harness connectors,
ECM pin recesses.
connector covers, seals, and cover shields for
cracks, cuts or worn areas. Replace if necessary. 2. Check for bent pins in ECM connections.

Sensors and Valves

1. Check all connector pins on sensors or valves. If
bent or corroded, replace damaged sensor.
 ENGINE ELECTRICAL 67

Installation Fuel Rail Pressure (FRP) Sensor

Main Engine Wiring Harness
1. Position main harness assembly on engine.
NOTE: Be sure to route and secure main harness
assembly in its correct configuration.
2. Install wiring harness clamps that secure wiring
harness to cylinder heads and front cover.
3. Connect main harness to sensors.
4. If removed, install ECM and support (page 69).
5. Connect ground (-) cable to battery.

Figure 73 FRP sensor

1. Install FRP sensor. Tighten sensor to special

torque (page 75).
2. If Under Valve Cover (UVC) harness not
previously removed, connect electrical connector
to FRP sensor.
68 ENGINE ELECTRICAL

Under Valve Cover (UVC) Harnesses

Figure 74 UVC harnesses

1. Fuel Rail Pressure (FRP) sensor
connector (right UVC harness
only)
2. Fuel injector assembly
connectors (4)

1. Position UVC harnesses to engine, clip UVC 3. Connect electrical connectors to four fuel injector
connectors to cylinder heads, and clip UVC assemblies and FRP sensor.
harnesses to fuel rails.
4. Install valve covers (page 256).
2. Connect main harness to UVC connectors.
5. Connect ground (-) cable to battery.
 ENGINE ELECTRICAL 69

Electronic Control Module (ECM) and Support 5. Install ECM to support.

Figure 75 ECM support Figure 76 ECM

1. Charging bridge bolt 1. M8 x 45 bolts (4)
2. ECM support 2. ECM
3. M6 nuts (5) 3. ECM engine connector
4. ECM chassis connector
5. ECM injector connector
1. Install ECM support and five M6 nuts. Tighten
nuts to special torque (page 75).
6. Install four M8 x 45 ECM bolts. Tighten bolts to
2. Install charging bridge bolt. Tighten to standard
special torque (page 75).
torque (page 383).
7. Connect ECM electrical connectors.
3. Clip main harness retainers to ECM support.
8. Connect ground (-) cable to battery.
4. Install oil level gauge tube assembly, M6 nut, and
M6 x 16 bolt. Tighten to standard torque (page
383).
70 ENGINE ELECTRICAL

Glow Plug Relay 1. Install each glow plug harness assembly to engine
and connect to main harness.
2. Connect glow plug electrical connectors by gently
pushing connector straight in, then seating valve
cover grommet.
3. Connect ground (-) cable to battery.

Variable Geometry Turbocharger (VGT) Actuator

Figure 77 Glow plug relay

1. Glow plug relay nuts
2. Battery (+) cable nut
3. Glow plug harness nut
4. Glow plug relay control connector

1. Install glow plug relay and nuts. Tighten nuts to

standard torque (page 383).
Figure 79 VGT actuator
2. Connect electrical connections to glow plug relay.
Install and tighten nuts to standard torque (page
383). 1. Connect electrical connector to VGT actuator.
3. Connect ground (-) cable to battery.

Exhaust Gas Recirculating (EGR) Valve

Glow Plug Harness Assemblies Connector

Figure 78 Glow plug harness assembly (right) Figure 80 EGR valve

 ENGINE ELECTRICAL 71

1. If removed, see Exhaust Gas Recirculation (EGR) Manifold Air Temperature (MAT) Sensor and
Valve Assembly (page 92) for installation of EGR Manifold Absolute Pressure (MAP) Sensor
valve.
2. Connect electrical connector to EGR valve.

Intake Throttle Valve (ITV) Connector

Figure 82 MAT and MAP sensors

1. MAP sensor
2. MAT sensor

Figure 81 Intake throttle housing assembly 1. Install new O-rings on MAT and MAP sensors and
connector lubricate with clean engine oil.
2. Install MAT and MAP sensors. Tighten sensors to
special torque (page 75).
1. If removed, see Intake Throttle Valve (ITV) and
Exhaust Gas Recirculation (EGR) Valve Elbow 3. Connect electrical connectors to MAT and MAP
Housing (page 89) for installation of ITV. sensors.
2. Connect electrical connector to ITV, located on top
front of engine.
Fuel Heater

Figure 83 Bowl assembly with fuel heater/probe

72 ENGINE ELECTRICAL

NOTE: Fuel heater and bowl assembly must be 2. Install WIF sensor.
replaced as an assembly.
3. Connect electrical connector to WIF sensor.
1. Install a new bowl primary filter seal onto bowl
assembly.
Engine Fuel Temperature (EFT) Sensor and
2. Install bowl assembly and hand tighten firmly.
Engine Fuel Pressure (EFP) Sensor
3. Connect electrical connector to bowl assembly.
4. Install new O-ring on WIF sensor and lubricate
with clean engine oil.
5. Install WIF sensor.
6. Connect electrical connector to WIF sensor.

Water In Fuel (WIF) Sensor

Figure 85 EFT sensor and EFP sensor

1. EFT sensor
2. EFP sensor

1. Install new O-rings on EFT sensor and EFP

sensor and lubricate with clean engine oil.
2. Install EFT sensor and EFP sensor. Tighten
sensors to special torque (page 75).
Figure 84 WIF sensor
3. Connect electrical connectors to EFT sensor and
EFP sensor installed in secondary fuel filter base.
1. Install new O-ring on WIF sensor and lubricate
with clean engine oil.
 ENGINE ELECTRICAL 73

Engine Oil Temperature (EOT) Sensor and Engine 1. Install a new O-ring on ECT sensor and lubricate
Oil Pressure (EOP) Sensor with clean engine oil.
2. Install ECT sensor. Tighten sensor to special
torque (page 75).
3. Connect electrical connector to ECT sensor
installed in left side of front cover.

Exhaust Back Pressure (EBP) Sensor

Figure 86 EOT sensor and EOP sensor

1. EOP sensor
2. EOT sensor

1. Install new O-rings on EOT sensor and EOP

sensor and lubricate with clean engine oil.
2. Install EOT sensor and EOP sensor. Tighten Figure 88 EBP sensor
sensors to special torque (page 75).
3. Connect electrical connectors to EOT sensor and
1. Install EBP sensor. Tighten sensor to special
EOP sensor installed in oil filter base assembly.
torque (page 75).
2. Connect electrical connector to EBP sensor
Engine Coolant Temperature (ECT) Sensor mounted in EBP tube assembly near breather
support on right valve cover.

Figure 87 ECT sensor

74 ENGINE ELECTRICAL

Camshaft Position (CMP) Sensor Crankshaft Position (CKP) Sensor

Figure 89 CMP sensor Figure 90 CKP sensor

1. Install two new O-rings on CMP sensor and 1. Install a new O-ring on CKP sensor and lubricate
lubricate with clean engine oil. with clean engine oil.
2. Install CMP sensor. 2. Install CKP sensor.
3. Install M6 x 14 bolt to CMP sensor. Tighten bolt 3. Install M6 x 14 bolt to CKP sensor. Tighten bolt to
to special torque (page 75). special torque (page 75).
4. Connect engine harness connector to CMP 4. Connect electrical connector to CKP sensor
sensor installed in front left side of crankcase. installed in front right side of lower crankcase.
 ENGINE ELECTRICAL 75

Special Torque
Table 4 Engine Electrical
Crankshaft Position (CKP) sensor bolt 10 N·m (89 lbf·in)
Camshaft Position (CMP) sensor bolt 10 N·m (89 lbf·in)
Engine Coolant Temperature (ECT) sensor 18 N·m (159 lbf·in)
Engine Fuel Temperature (EFT) sensor 18 N·m (159 lbf·in)
Engine Oil Pressure (EOP) sensor 12 N·m (106 lbf·in)
Engine Oil Temperature (EOT) sensor 18 N·m (159 lbf·in)
Engine Fuel Pressure (EFP) Sensor 12 N·m (106 lbf·in)
Fuel Rail Pressure (FRP) sensor 2 N·m (18 lbf·in), then turn one hex flat (60 degrees)
Manifold Air Temperature (MAT) sensor 18 N·m (159 lbf·in)
Manifold Absolute Pressure (MAP) sensor 12 N·m (106 lbf·in)
Exhaust Back Pressure (EBP) sensor 20 N·m (177 lbf·ft)
Electronic Control Module (ECM) bolts 13 N·m (115 lbf·in)
ECM support nuts 13 N·m (115 lbf·in)

Special Service Tools

Table 5 Engine Electrical

Description Tool Number
Fuel Injector Electrical Connector Release Tool ZTSE4820
76 ENGINE ELECTRICAL
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 77

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Exhaust Gas Recirculation (EGR) Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Exhaust Gas Recirculation (EGR) Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Intake Throttle Valve (ITV) and Exhaust Gas Recirculation (EGR) Valve Elbow Housing. . . . . . . . .87

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Clean and Inspect Exhaust Gas Recirculation (EGR) System Components. . . . . . . . . . . . . . . . . . . . . . . .88
Exhaust Gas Recirculation (EGR) Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Exhaust Gas Recirculation (EGR) Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
Exhaust Gas Recirculation (EGR) Valve Elbow Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Intake Throttle Valve (ITV) and Exhaust Gas Recirculation (EGR) Valve Elbow Housing. . . . . . . . .89
Exhaust Gas Recirculation (EGR) Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
Exhaust Gas Recirculation (EGR) Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

78 EXHAUST GAS RECIRCULATION (EGR) SYSTEM
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 79

Exploded Views

Figure 91 EGR valve

1. EGR valve assembly 3. Hose clamp (2) 5. EGR valve housing gasket
2. M6 x 20 bolt (3) 4. EGR valve coolant supply hose
80 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

Figure 92 EGR coolant tubes

1. Coolant hose clamp(s) (4) 3. M6 x 16 bolt (2) 5. Seal (O-ring) (2)
2. EGR coolant return tube 4. EGR coolant supply tube 6. Coolant tube hose (2)
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 81

Figure 93 EGR cooler assembly

1. EGR cooler 5. M8 x 20 bolt (2) 9. EGR cooler bracket
2. #10 washer (2) 6. EGR cooler 1 to 2 gasket 10. M8 x 27 bolt (3)
3. M10 x 1.5 nut (2) 7. EGR cooler clamp (3) 11. Exhaust tube gasket
4. EGR top bracket 8. M10 x 50 bolt (4)
82 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

Figure 94 Intake Throttle Valve (ITV) and EGR valve elbow housing
1. M6 x 25 bolt (3) 4. M6 x 20 bolt (2) 7. EGR valve elbow housing
2. Intake throttle gasket 5. M6 x 25 stud bolt
3. ITV 6. Intake throttle gasket
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 83

Removal NOTE: See Electrical section for information on

removal of components prior to this section.
Exhaust Gas Recirculation (EGR) Valve Assembly
GOVERNMENT REGULATION: Engine
fluids (oil, fuel, and coolant) may be a hazard
to human health and the environment.
Handle all fluids and other contaminated
materials (e.g. filters, rags) in accordance
with applicable regulations. Recycle
or dispose of engine fluids, filters, and
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the “Safety
Information” section of this manual.

WARNING: To prevent personal injury or Figure 95 EGR valve assembly

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing 1. EGR valve assembly
diagnostic or service procedures. 2. M6 x 20 bolt (3)
3. EGR valve coolant supply hose
4. Hose clamp (2)
WARNING: To prevent personal injury or 5. EGR valve assembly electrical connector
death, make sure that the engine has cooled
before removing components.
1. Disconnect electrical connector from EGR valve
WARNING: To prevent personal injury or assembly.
death, wear safety glasses with side shields.
2. Loosen two hose clamps and disconnect EGR
Limit compressed air pressure to 207 kPa (30 psi).
valve coolant supply hose.
3. Loosen two hose clamps and disconnect EGR
WARNING: To prevent personal injury or
valve coolant return hose (not shown in Figure
death, do not let engine fluids stay on your skin.
95).
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing 4. Remove three M6 x 20 EGR valve assembly bolts.
and rags contaminated with engine fluids.
84 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

6. Install puller cup onto EGR valve assembly.

7. Align puller J-hooks into slots directly behind EGR
valve assembly upper cover screws.
8. Install puller collar around base of EGR valve
assembly and install collar bolt.

Figure 96 EGR valve puller

1. Puller studs
2. Upper plate
3. Threaded shaft
4. Collar
5. Lower plate
6. J-hook (2)
Figure 98 EGR valve puller installed
7. Puller cup
8. Collar bolt

NOTE: Make sure puller studs are completely seated.

5. Install EGR Valve Puller (page 93) onto EGR 9. Thread three puller studs through puller lower
valve assembly. plate, J-hooks and collar, EGR valve assembly,
and into EGR elbow housing.
10. Rotate upper puller plate to align with puller studs,
and turn threaded shaft clockwise to seat upper
plate onto puller stud hex heads.
11. Turn threaded shaft clockwise to remove EGR
valve assembly. Discard EGR valve housing
gasket.

Exhaust Gas Recirculation (EGR) Cooler

1. Remove two coolant drain plugs and drain coolant
from crankcase into a suitable container. The
coolant drain plugs (page 43) are in rear of
crankcase, below exhaust manifolds.

Figure 97 EGR valve puller installation

CAUTION: To prevent EGR valve assembly damage,

be careful when installing puller cup, or damage to
EGR valve assembly may result.
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 85

6. Remove two M6 nuts from charging circuit bridge

at right valve cover.
7. Remove M8 nut from charging circuit bridge
bracket at turbocharger oil inlet flange.
8. Remove M6 x 16 bolt and nut from charging circuit
bridge at Engine Control Module (ECM) support.
9. Remove charging circuit bridge.

Figure 99 Breather tube

1. Breather tube
2. Breather hose clamps (2)
3. M6 nut

2. Remove M6 nut and disconnect breather tube

clamp from charging circuit bridge.
3. Loosen hose clamp and disconnect breather tube
hose from breather. Figure 101 Coolant hose clamps

4. Loosen hose clamp and disconnect breather tube

from turbo air inlet duct. 10. Loosen four coolant hose clamps retaining EGR
5. Remove breather tube. coolant supply and coolant return hoses.

Figure 100 Charging circuit bridge Figure 102 Fan drive pulley

1. M6 x 16 bolt and nut 1. M8 x 20 bolt (6)

2. Charging circuit bridge 2. Fan drive pulley
3. M6 nut (2)
4. M8 nut
86 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

NOTE: If not using an impact wrench, use a holding 15. Remove and discard three M8 x 27 EGR cooler
device to lock fan drive pulley when removing bolts. inlet bolts.
11. Remove six M8 x 20 bolts and fan drive pulley.

Figure 105 EGR cooler outlet bolts

Figure 103 EGR coolant supply and coolant

return tube bolts 16. Remove two M8 x 20 EGR cooler outlet bolts.

12. Remove two M6 x 16 EGR coolant supply tube

and EGR coolant return tube bolts.
13. Disconnect EGR coolant supply and EGR coolant
return tubes from EGR cooler and front crankcase
cover, and discard seals (O-ring).
14. Remove EGR coolant supply and EGR coolant
return tubes from engine.

Figure 106 EGR top bracket nuts

NOTE: To aid in removal of two EGR top bracket nuts,

loosen nuts between ⅛ and ¼ of a turn, then tap each
nut using a socket or flat punch and hammer. This
knocks the peaks of the stud bolt threads off the ramps
of the special Spiralock® nuts, allowing the nuts to
unthread easily.
17. Remove and discard two M10 x 1.5 EGR top
Figure 104 EGR cooler inlet bolts bracket nuts.
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 87

22. Remove EGR cooler from EGR cooler bracket.

Intake Throttle Valve (ITV) and Exhaust Gas

Recirculation (EGR) Valve Elbow Housing

Figure 107 EGR cooler bracket bolts

18. Remove four M10 x 50 EGR cooler bracket bolts.

19. Remove EGR cooler assembly from engine and
discard gaskets.
Figure 109 ITV bolts
1. ITV
2. M6 x 20 bolt (2)
3. M6 x 25 stud bolt

1. Remove M6 x 25 stud bolt and two M6 x 20 bolts

retaining ITV to EGR valve elbow housing.
2. Remove ITV from EGR valve elbow housing and
discard gasket.

Figure 108 EGR cooler assembly

1. EGR cooler clamp (3)
2. EGR top bracket
3. EGR cooler bracket
4. EGR cooler

20. Remove and discard three EGR cooler clamps.

21. Remove EGR top bracket.
NOTE: The lower EGR cooler bracket is mounted to
Figure 110 EGR valve elbow housing bolts
intake manifold with the manifold bolts. For removal of
lower EGR cooler bracket, see Intake Manifold (page 1. M6 x 25 bolt (3)
177). 2. EGR valve elbow housing
88 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

3. Remove three M6 x 25 bolts retaining EGR valve Exhaust Gas Recirculation (EGR) Cooler
elbow housing to intake manifold.
4. Remove EGR valve elbow housing and discard
gasket.

Cleaning, Inspection, and Testing

Clean and Inspect Exhaust Gas Recirculation
(EGR) System Components
1. Clean all gasket material and carbon deposits
off of EGR cooler and exhaust manifold mating
surfaces.
2. Clean gasket mating surfaces of EGR cooler and
EGR valve elbow housing.
Figure 111 EGR cooler with pressure test plates
3. Clean gasket mating surfaces of EGR valve
installed
assembly and remove all carbon deposits, using
EGR Valve Bore Cleaning Brush (page 93). 1. EGR cooler test plates
2. Air pressure regulator assembly
4. Clean all corrosion from ends of all EGR valve
assembly coolant pipes and tubes.
5. Clean EGR coolant supply and EGR coolant 1. Install EGR Cooler Test Plates (page 93) to each
return ports in front of front crankcase cover end of EGR cooler assembly.
assembly.
6. Inspect all EGR system components for cracks WARNING: To prevent personal injury or
and damage. Replace worn or damaged parts. death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Attach an air pressure regulator to EGR cooler.
Exhaust Gas Recirculation (EGR) Valve Assembly
Connect to shop air supply and adjust air pressure
Check pintle shaft and frame for misalignment. to approximately 172 to 207 kPa (25 to 30 psi).
Remove EGR valve elbow housing gasket (if not
3. Completely submerge EGR cooler in a sink or
removed) and discard. For electrical inspections, see
large container of water. Inspect for air bubbles
EGES-350-1 Engine Diagnostic Manual.
coming from coolant passages.
4. If leaks are not detected, reinstall EGR cooler. If
leaks are detected, install a new EGR cooler.

Exhaust Gas Recirculation (EGR) Valve Elbow

Housing
The EGR valve elbow housing is a one piece
casting and may be cleaned with steam or suitable
non-caustic solvents.
Clean contact areas of EGR O-ring in EGR valve
elbow housing. Make sure carbon above and below
contact areas can be vacuumed from EGR valve
elbow housing. Vacuum loose carbon debris.
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 89

Installation 3. Position a new gasket and install ITV to EGR valve

elbow housing.
Intake Throttle Valve (ITV) and Exhaust Gas
Recirculation (EGR) Valve Elbow Housing 4. Install M6 x 25 stud bolt and two M6 x 20 bolts
retaining ITV to EGR valve elbow housing.
Tighten bolts to special torque (page 93).

Exhaust Gas Recirculation (EGR) Cooler

CAUTION: To prevent engine damage, hand torque
all nuts and bolts of EGR system. EGR hardware
has a special high-temperature coating which will be
damaged by air tools.

Figure 112 EGR valve elbow housing bolts

1. M6 x 25 bolt (3)
2. EGR valve elbow housing

1. Position a new gasket on intake manifold and

install EGR valve elbow housing.
2. Install three M6 x 25 bolts retaining EGR valve
elbow housing to intake manifold. Tighten bolts
Figure 114 EGR cooler assembly
to standard torque (page 383).
1. EGR cooler clamp (3)
2. EGR top bracket
3. EGR cooler bracket
4. EGR cooler

1. Place EGR cooler in EGR cooler bracket.

2. Install EGR top bracket on EGR cooler.
NOTE: Do not tighten EGR cooler clamps at this time.
3. Loosely install three new EGR cooler clamps.
NOTE: Make sure two #10 washers are present on
turbocharger stud bolts.
4. Position new gaskets and install EGR cooler to
engine.
Figure 113 ITV bolts
1. ITV
2. M6 x 20 bolt (2)
3. M6 x 25 stud bolt
90 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

Figure 115 EGR cooler outlet bolts Figure 117 EGR cooler bracket bolts

5. Install two M8 x 20 EGR cooler outlet bolts. 7. Loosely install four M10 x 50 EGR cooler bracket
Tighten bolts to special torque (page 93). bolts.
8. Tighten three EGR cooler clamps as follows:
A. Tighten clamps to 10 N·m (89 lbf·in).
B. Back out clamps two full turns.
C. Re-tighten clamps to 8 N·m (71 lbf·in).
9. Tighten four M10 x 50 EGR cooler bracket bolts
to standard torque (page 383).

Figure 116 EGR cooler inlet bolts

6. Install three new M8 x 27 EGR cooler inlet bolts.

Tighten bolts to standard torque (page 383).

Figure 118 EGR top bracket nuts

10. Install two M10 x 1.5 EGR top bracket nuts.

Tighten nuts to special torque (page 93).
11. Install new seals on EGR coolant supply and EGR
coolant return tubes.
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 91

12. Connect EGR coolant supply and EGR coolant

return tubes to EGR cooler and front crankcase
cover.

Figure 121 Coolant hose clamps

15. Tighten four coolant hose clamps to special torque

Figure 119 EGR coolant supply and EGR (page 93).
coolant return tube bolts

13. Install EGR coolant supply and EGR coolant

return tube bolts. Tighten bolts to standard torque
(page 383).

Figure 122 Charging circuit bridge

1. M6 x 16 bolt and nut (1)
2. Charging circuit bridge
3. M6 nut (2)
4. M8 nut (1)
Figure 120 Fan drive pulley
1. M8 x 20 bolts (6)
16. Slide charging circuit bridge under wiring harness
2. Fan drive pulley
and onto two right valve cover stud bolts. Install
two M6 nuts and tighten to standard torque (page
NOTE: Use a holding device to lock fan drive pulley 383).
when installing bolts.
17. Position charging circuit bridge bracket onto turbo
14. Install fan drive pulley and six M8 x 20 bolts. oil inlet flange stud bolt. Install M8 nut and tighten
Tighten bolts to standard torque (page 383). to standard torque (page 383).
92 EXHAUST GAS RECIRCULATION (EGR) SYSTEM

18. Secure charging circuit bridge to Engine Control Exhaust Gas Recirculation (EGR) Valve Assembly
Module (ECM) support with M6 x 16 bolt and nut.
Tighten to standard torque (page 383).

Figure 124 EGR valve assembly

1. EGR valve assembly
Figure 123 Breather tube
2. M6 x 20 bolt (3)
1. Breather tube 3. EGR valve coolant supply hose
2. Breather hose clamps (2) 4. Hose clamp (2)
3. M6 nut 5. EGR valve assembly electrical connector

19. Connect breather tube hose to breather and 1. Install a new EGR valve housing gasket on EGR
tighten hose clamp. valve assembly.
20. Connect breather tube to turbo air inlet duct and 2. Install EGR valve assembly.
tighten hose clamp.
NOTE: Make sure EGR valve assembly is fully
21. Connect breather tube clamp to charging circuit seated.
bridge and secure with M6 nut. Tighten nut to
3. Install three M6 x 20 EGR valve assembly bolts.
standard torque (page 383).
Tighten bolts to special torque (page 93).
4. Connect EGR valve coolant return hose and
position two hose clamps (not shown in Figure
34).
5. Connect EGR valve coolant supply hose and
position two hose clamps.
6. Connect EGR valve assembly electrical
connector.
 EXHAUST GAS RECIRCULATION (EGR) SYSTEM 93

Special Torque
Table 6 Exhaust Gas Recirculation (EGR) System
EGR cooler outlet bolts 25 N·m (18 lbf·ft)
EGR cooler clamps See tightening step in procedure.

Coolant hose clamps 4 N·m (35 lbf·in)

EGR top bracket nuts 57 N·m (42 lbf·ft)

EGR valve assembly bolts 11 N·m (97 lbf·in)

Intake Throttle Valve (ITV) bolts 11 N·m (97 lbf·in)

Special Service Tools

Table 7 Exhaust Gas Recirculation (EGR) System
Description Tool Number
EGR Valve Bore Cleaning Brush ZTSE4753
EGR Valve Puller ZTSE4743
EGR Cooler Test Plates ZTSE4707
94 EXHAUST GAS RECIRCULATION (EGR) SYSTEM
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 95

Table of Contents

Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Left Exhaust Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Right Exhaust Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Variable Geometry Turbocharger (VGT) Assembly and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
Turbo Actuator Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Cleaning and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Variable Geometry Turbocharger (VGT) Assembly and Related Parts Cleaning. . . . . . . . . . . . . . . . . .105
Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Check Free Rotation and Housing Rub. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
Check Axial End Play. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Turbo Actuator Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Variable Geometry Turbocharger (VGT) Assembly and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Right Exhaust Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
Left Exhaust Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113

96 VARIABLE GEOMETRY TURBOCHARGER (VGT)
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 97

Description
Exploded View

Figure 125 Variable Geometry Turbocharger (VGT) components

1. Turbo oil supply tube assembly 8. M10 x 35 bolt (2) 15. Turbo oil drain tube
2. M8 stud bolt 9. Exhaust tube gasket (5) 16. Turbo support
3. Turbo heat shield 10. Right exhaust tube 17. M10 x 30 bolt (6)
4. M8 x 20 bolt 11. M8 x 27 bolt (9) 18. Turbo oil drain tube O-ring (2)
5. M10 stud bolt (2) 12. Left exhaust tube 19. Turbocharger assembly
6. M6 x 10 bolt (3) 13. M8 nut (6) 20. M6 x 20 bolt
7. O-ring (2) 14. Turbo bracket gasket
98 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Operation actuator is part of the turbocharger assembly, and

is controlled by the controlled area network signals
The VGT is a closed loop system that uses the
from the ECM in response to engine speed, required
Exhaust Back Pressure (EBP) sensor to provide
fuel quantity, boost, exhaust back pressure, and
feedback to the Electronic Control Module (ECM).
altitude. The VGT actuator controls the movement of
The ECM uses the EBP sensor to continuously
the vanes linked by an adjusting ring in the turbine
monitor the EBP and adjust the duty cycle to the VGT
housing. Turbine exhaust gas flow and resulting VGT
to match engine requirements.
boost are modified by vane position.
The VGT increases power output by supplying
The key feature of the VGT is actuated vanes in
compressed air to the engine. The internal
the turbine housing. The vanes modify the flow
components are oil and air cooled. Engine oil is
characteristics of the exhaust gases through the
circulated through the housing, which acts as a
turbine housing. This controls boost pressure needed
heat barrier between the hot turbine and the cold
for various engine speeds and load conditions. An
compressor. Sleeve bearings are lubricated by
additional benefit is lower exhaust emissions.
engine oil. Oil is pumped directly from the oil filter
base, circulates to the VGT housing, and returns Actuated vanes are mounted around the inside
to the sump through an oil drain in the VGT center circumference of the turbine housing. An adjusting
housing. ring links all the vanes. When the adjusting ring
moves, all vanes move to the same position.
Expanding exhaust gases drive the turbine shaft
Adjusting ring movement occurs when the VGT
assembly to speeds over 100,000 rpm. Filtered
actuator receives a controlled area network signal for
air entering the compressor side of the VGT is
a required position.
compressed and delivered through a charge air
cooler (CAC). Hot compressed air is cooled, filling the Exhaust gas flow can be regulated depending on
intake manifold at a pressure higher than atmospheric the required exhaust back pressure for engine speed
pressure. Because considerably more air is forced and load. As power demands increase, exhaust gas
into the intake manifold, the results are increased velocity increases in direct relation, as does intake
power, fuel efficiency and the ability to maintain power manifold boost pressure. Conversely, as the flow
at higher altitudes. of exhaust gas diminishes, intake manifold boost
pressure is also reduced at the same rate.
The VGT actuator, a variable position actuator,
controls turbocharger turbine vane position. The VGT
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 99

Removal Left Exhaust Tube

WARNING: To prevent personal injury or

death, read all safety instructions in the “Safety
Information” section of this manual.

WARNING: To prevent personal injury or

death, shift the transmission to park or neutral,
set the parking brake, and block the wheels before
doing diagnostic or service procedures.

WARNING: To prevent personal injury or

death, make sure the engine and turbocharger
have cooled before removing the turbocharger.

WARNING: To prevent personal injury or

death, remove the ground cable from the negative Figure 126 Left exhaust tube to turbocharger
terminal of the main battery before disconnecting assembly connection
or connecting electrical components. Always 1. M8 x 27 bolt (3)
connect the ground cable last. 2. Left exhaust tube

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin. 1. Remove and discard three M8 x 27 bolts.
Clean skin and nails using hand cleaner and wash 2. Remove and discard left exhaust tube gasket.
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

GOVERNMENT REGULATION: Engine

fluids (oil, fuel, and coolant) may be a threat
to the environment. Recycle or dispose
of engine fluids according to applicable
regulations. Never put engine fluids in the
trash, on the ground, in sewers or bodies of
water.

NOTE: See the following service sections for

information on removal of components prior to this
section.
Figure 127 Left exhaust tube to exhaust
• Engine Electrical manifold connection
• Exhaust Gas Recirculation (EGR) System 1. M8 nut (3)
2. Left exhaust tube

3. Remove and discard three M8 nuts from left

exhaust manifold studs.
4. Disconnect and remove left exhaust tube.
100 VARIABLE GEOMETRY TURBOCHARGER (VGT)

5. Remove and discard left exhaust tube to manifold 3. Remove and discard three M8 x 27 bolts.
gasket.
4. Remove and discard right exhaust tube gasket.

Right Exhaust Tube

Figure 130 Right exhaust tube to exhaust

manifold connection
Figure 128 Exhaust Back Pressure (EBP) sensor 1. Right exhaust tube
tube connection 2. M8 nut (3)
1. Right exhaust tube
2. EBP sensor tube fitting nut
5. Remove and discard three M8 nuts from right
exhaust manifold studs.
1. Loosen EBP sensor tube fitting nut. 6. Disconnect and remove right exhaust tube.
2. Disconnect EBP sensor tube and position aside. 7. Remove and discard right exhaust tube to
manifold gasket.
8. Remove EBP sensor tube fitting from right
exhaust tube.

Variable Geometry Turbocharger (VGT) Assembly

and Components
1. Remove Exhaust Gas Recirculation (EGR) cooler
(page 84).

Figure 129 Right exhaust tube to turbocharger

assembly connection
1. M8 x 27 bolt (3)
2. Right exhaust tube
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 101

5. Cover opening of turbocharger assembly air inlet

with Cap Kit (page 113).

Figure 131 EGR top bracket washers

1. Stud bolt (2)
2. #10 washer (2)
Figure 133 Turbo heat shield
1. Turbo heat shield
2. Remove two #10 washers from turbocharger stud 2. M6 x 10 bolt (3)
bolts.

6. Remove three M6 x 10 bolts.

7. Remove turbo heat shield.

Figure 132 Turbo air inlet duct

1. Turbo air inlet duct
2. Turbo air inlet duct clamp
Figure 134 VGT actuator electrical connector

NOTE: Mark the orientation of the turbo air inlet duct

so that it can be installed in its original position. 8. Disconnect electrical connector from VGT
actuator.
3. Loosen turbo air inlet duct clamp.
4. Remove turbo air inlet duct.
102 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Figure 135 Turbo oil supply tube assembly Figure 136 Turbocharger assembly mounting
1. M8 x 20 bolt 1. M10 x 35 bolt (2)
2. Turbo oil supply tube assembly 2. M10 stud bolt (2)
3. M6 x 20 bolt
4. M8 stud bolt
15. Remove two turbocharger assembly M10 x 35
bolts.
9. Remove M6 x 20 bolt from turbo oil supply tube
16. Remove two turbocharger assembly M10 stud
assembly at oil filter base assembly.
bolts.
10. Remove M8 x 20 bolt from turbo oil supply tube
17. Lift turbocharger assembly up and off engine.
assembly at turbocharger assembly.
NOTE: Use Cap Kit (page 113) to cover turbocharger
11. Remove M8 stud bolt from turbo oil supply tube
assembly openings. If plastic caps are not available,
assembly at turbocharger assembly.
cover openings with tape.
12. Remove turbo oil supply tube assembly.
13. Remove and discard O-rings.
14. Cover turbo oil supply tube port assembly port in
the oil filter base assembly with Turbo Oil Supply
Block Off Plug Kit (page 113).

Figure 137 Turbo oil drain tube

18. Remove turbo oil drain tube.

 VARIABLE GEOMETRY TURBOCHARGER (VGT) 103

NOTE: If removing turbocharger assembly only, plug CAUTION: To prevent engine damage, do not twist
drain hole in turbo support with Turbo Oil Supply Block the exhaust outlet or wedge a pry tool between
Off Plug Kit (page 113) to keep out foreign material. the exhaust outlet and turbocharger; damage to
the locating pin may occur, resulting in improper
19. Remove and discard two turbo oil drain tube
alignment of the exhaust outlet.
O-rings.
21. Remove exhaust outlet.

Figure 138 Turbocharger assembly exhaust

outlet Figure 139 Turbo support

1. Exhaust outlet V-clamp 1. M10 x 30 bolt (6)

2. Exhaust outlet 2. Turbo support

20. Loosen exhaust outlet V-clamp nut and remove 22. Remove six M10 x 30 turbo support bolts.
V-clamp. 23. Remove turbo support.
24. Remove and discard turbo bracket gasket.
104 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Turbo Actuator Assembly

Only remove the turbocharger actuator and linkage if
the turbocharger actuator is defective.

Figure 140 Turbocharger Actuator and linkage

1. Actuator linkage 4. Lock nut 6. Variable Geometry Turbocharger
2. Turbo actuator 5. Recessed hex area on ball stud (VGT) lever
3. Serrated lock nut (4)

1. To access blocked serrated lock nut, pivot sticking or not sticking. Manually rotate the VGT
actuator linkage out of the way, against spring lever with a slow consistent pressure.
pressure. Hold linkage in place using a tie strap
• If the VGT lever is not sticking, continue with
against spring tension.
step 4.
2. Insert a long 4 mm Allen wrench into recessed hex
• If the VGT lever is sticking or will not reach
area on ball stud of the actuator linkage. Rotate
the endstop, stop. Clean the VGT lever; then,
ball stud to disengage from lock nut in recessed
manually rotate the VGT lever with a slow
pocket. Remove lock nut from actuator linkage.
consistent pressure. If the VGT lever does not
Discard lock nut.
reach the endstop, install a new turbocharger
NOTE: Actuator shaft may require rotation or rocking assembly.
motion to remove.
4. Remove and discard four serrated lock nuts.
3. Once the actuator linkage is disconnected from
5. Lift up on actuator linkage arm and remove turbo
the turbocharger, determine if the VGT lever is
actuator from mounting bracket.
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 105

Cleaning and Inspection

Variable Geometry Turbocharger (VGT) Assembly
and Related Parts Cleaning

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
NOTE: Do not use a caustic solution on turbocharger
assembly and related components.
1. Clean piping between turbocharger assembly and
air cleaner assembly with soap and water. Dry all
piping with filtered compressed air.
2. Clean air inlet piping and connecting hoses with
filtered compressed air. Figure 141 Free rotation of turbocharger
assembly shaft
3. Clean oil inlet tube and oil drain tube with a
nonchlorinated solvent and a nylon brush. Dry
tubes with filtered compressed air. Replace any 2. Turn turbine shaft by hand and check for wheel
damaged tubes. rub in each housing.
NOTE: Corrosion on the turbocharger or actuator The wheels must rotate freely. If there is any
shafts may inhibit the motion of the turbocharger vane rubbing or interference, replace turbocharger
mechanism. assembly.
4. Clean the area adjacent to the housing on both the
turbocharger and actuator shafts and make sure
both shafts turn freely. Use a suitable corrosion Check Axial End Play
removal product to clean the shafts.
5. Make sure the turbocharger shaft moves freely.

Inspection
1. Inspect turbocharger assembly for cracks and
leaks. Replace if necessary.
2. Inspect compressor impeller and turbine wheel
for blade erosion, bending, breakage or deposits.
Replace turbocharger assembly if damaged.
NOTE: Replace turbocharger assembly if blades are
bent. Do not attempt to straighten bent wheel blades.
Check Free Rotation and Housing Rub
1. Place turbocharger assembly on a bench with the Figure 142 Axial end play
shaft in a horizontal position.

1. Install dial indicator with magnetic base (page

113) on the flat surface of turbocharger housing
opposite to VGT actuator. Push turbine shaft
away from dial indicator. Put tip of dial indicator
on turbine shaft end and zero the indicator.
106 VARIABLE GEOMETRY TURBOCHARGER (VGT)

2. Manually move turbine shaft toward and then play exceeds specifications (page 113), replace
away from dial indicator. If turbine shaft axial end turbocharger assembly.
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 107

Installation
Turbo Actuator Assembly

Figure 143 Turbocharger Actuator and linkage

1. Actuator linkage 4. Lock nut 6. Variable Geometry Turbocharger
2. Turbo actuator 5. Recessed hex area on ball stud (VGT) lever
3. Serrated lock nut (4)

1. Insert turbocharger linkage through mounting lock nut in place and insert 4 mm Allen wrench into
bracket opening. recessed area located on the ball stud. Turn ball
stud to engage the lock nut and torque ball stud
NOTE: Rotation of shaft or linkage is required for
to 8.5 N·m (75 lbf·in).
actuator studs to be properly installed.
4. Manually rotate linkage assembly in a slow
2. Slide actuator studs into mounting bracket holes.
consistent manner checking to see if there is any
Install four new serrated lock nuts on studs.
binding due to misalignment of linkage.
Torque nuts to 13.6 N·m (120 lbf·in). If used,
remove tie strap holding actuator. • If binding, determine source of binding
or remove actuator linkage from the
3. Install new lock nut into hex pocket on VGT lever
turbocharger and repeat steps 1 through 4.
with rounded side of the nut facing outward. Hold
108 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Variable Geometry Turbocharger (VGT) Assembly NOTE: Align pin on turbocharger assembly exhaust
and Components outlet with hole in turbocharger assembly.
4. Attach turbocharger assembly exhaust outlet to
turbocharger assembly.

Figure 144 Turbo support

1. M10 x 30 bolt (6)
2. Turbo support Figure 146 Turbocharger assembly exhaust
outlet
1. Exhaust outlet V-clamp
1. Place a new turbo bracket gasket in engine valley.
2. Exhaust outlet
2. Place turbo support in engine valley.
NOTE: If not immediately installing the turbocharger
5. Install turbocharger assembly exhaust outlet
assembly, cover turbo oil drain hole with Turbo Oil
V-clamp and tighten to special torque (page 113).
Supply Block Off Plug Kit (page 113).
6. Remove Turbo Oil Supply Block Off Plug Kit (page
3. Install six M10 x 30 bolts to secure turbo support to
113) from turbo support.
crankcase. Tighten bolts to special torque (page
113). 7. Install two new turbo oil drain tube O-rings and
lubricate both O-rings with clean engine oil.

Figure 145 Align turbocharger assembly

exhaust outlet Figure 147 Turbo oil drain tube
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 109

8. Install turbo drain tube into turbo support. 14. Install and lubricate a new O-ring on turbo oil
supply tube assembly.
9. Remove turbo oil drain tube cap (if installed) and
lower turbocharger assembly on turbo support 15. Install a new O-ring on turbocharger assembly oil
and turbo oil drain tube. supply port.

Figure 148 Turbocharger assembly mounting Figure 149 Turbo oil supply tube assembly
1. M10 x 35 bolt (2) 1. M8 x 20 bolt
2. M10 stud bolt (2) 2. Turbo oil supply tube assembly
3. M6 x 20 bolt
4. M8 stud bolt
10. Coat threads of two M10 x 35 flange head bolts
and two M10 stud bolts with anti-seize compound
and secure turbocharger assembly to turbo 16. Install turbo oil supply tube assembly in oil supply
support. line port in oil filter base assembly.
11. Tighten turbocharger assembly bolts and stud 17. Install M6 x 20 turbo oil supply tube assembly to oil
bolts to special torque (page 113). filter base assembly bolt. Tighten bolt to special
12. Remove Turbo Oil Supply Block Off Plug (page torque (page 113).
113) from oil filter base assembly. 18. Position oil supply tube flange over turbocharger
CAUTION: To prevent engine damage, lubricate assembly oil supply port and secure with M8 x 20
turbocharger assembly bearings before installing the bolt and M8 stud bolt.
turbocharger assembly. NOTE: Alternate tightening between bolt and stud bolt
13. Lubricate oil inlet hole of turbocharger assembly until correct torque is reached.
with clean engine oil and spin compressor wheel 19. Tighten turbo oil supply tube assembly to
several times to coat bearings with oil. Refill oil turbocharger bolt and stud bolt to special torque
inlet hole up to oil supply tube assembly mounting (page 113).
surface.
110 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Figure 150 EGR top bracket washers Figure 152 Turbo air inlet duct
1. Stud bolt (2) 1. Turbo air inlet duct
2. #10 washer (2) 2. Turbo air inlet duct clamp

20. Place two #10 washers on turbocharger stud 23. Install turbo air inlet duct on turbocharger
bolts. assembly.
NOTE: Before tightening clamp, position the turbo
air inlet duct according to the alignment marks made
during removal.
24. Secure turbo air inlet duct to turbocharger
assembly by tightening clamp to special torque
(page 113).

Figure 151 Turbo heat shield

1. Turbo heat shield
2. M6 x 10 bolt (3)

21. Install turbo heat shield on VGT.

22. Install three M6 x 10 bolts and tighten to special Figure 153 VGT actuator electrical connector
torque (page 113).
25. Connect electrical connector to VGT actuator.
26. Install Exhaust Gas Recirculation (EGR) cooler
(page 89).
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 111

Right Exhaust Tube 3. Install a new gasket on right exhaust tube to

turbocharger assembly and secure with three
1. Install a new gasket on right exhaust manifold
new M8 x 27 bolts.
studs.
4. Tighten three right exhaust tube to exhaust
manifold M8 nuts to special torque (page 113).
5. Tighten three right exhaust tube to turbocharger
assembly M8 x 27 bolts to special torque (page
113).
6. Install Exhaust Back Pressure (EBP) sensor tube
fitting on right exhaust manifold. Tighten fitting to
special torque (page 113).

Figure 154 Right exhaust tube to exhaust

manifold connection
1. Right exhaust tube
2. M8 nut (3)

2. Install right exhaust tube to manifold with three

new M8 nuts. Do not tighten nuts at this time.
Figure 156 EBP sensor tube connection
1. Right exhaust tube
2. EBP sensor tube fitting nut

7. Connect EBP sensor tube.

NOTE: When using a crowfoot extension make
sure to adjust the torque settings as necessary to
compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
8. Tighten fitting nut to special torque (page 113).

Figure 155 Right exhaust tube to turbocharger

assembly connection
1. M8 x 27 bolt (3)
2. Right exhaust tube
112 VARIABLE GEOMETRY TURBOCHARGER (VGT)

Left Exhaust Tube

Figure 158 Left exhaust tube to turbocharger

assembly connection
Figure 157 Left exhaust tube to exhaust
manifold connection 1. M8 x 27 bolt (3)
2. Left exhaust tube
1. M8 nut (3)
2. Left exhaust tube
3. Install a new gasket on left exhaust tube to
turbocharger assembly and secure flange with
1. Install a new gasket on left exhaust manifold three new M8 x 27 bolts.
studs.
4. Tighten three left exhaust tube to manifold M8
2. Install left exhaust tube to exhaust manifold with nuts to special torque (page 113).
three new M8 nuts. Do not tighten nuts at this
time. 5. Tighten three left exhaust tube to turbocharger
assembly M8 x 27 bolts to special torque (page
113).
 VARIABLE GEOMETRY TURBOCHARGER (VGT) 113

Specifications
Table 8 Variable Geometry Turbocharger (VGT) Shaft
Turbine shaft axial end play 0.05 - 0.10 mm (0.002 - 0.004 in).

Special Torque
Table 9 Turbocharger Assembly Bolts and Clamps
Turbo air inlet duct clamp 5 N·m (48 lbf·in)
Exhaust tube to exhaust manifold nuts 31 N·m (23 lbf·ft)
Exhaust tube to turbocharger assembly bolts 31 N·m (23 lbf·ft)
Turbo oil supply tube assembly to turbocharger bolt and stud bolt 31 N·m (23 lbf·ft)

Turbo oil supply tube assembly to oil filter base assembly bolt 13 N·m (115 lbf·in)

Turbocharger assembly exhaust outlet V-clamp 10 N·m (89 lbf·in)

Turbo support bolts 50 N·m (37 lbf·ft)

Turbocharger assembly bolts and stud bolts 72 N·m (53 lbf·ft)

Turbo heat shield bolts 10 N·m (89 lbf·in)

Exhaust Back Pressure (EBP) sensor tube fitting nut 20 N·m (177 lbf·in)
EBP sensor tube fitting 27 N·m (239 lbf·in)

Special Service Tools

Table 10 Turbocharger
Description Tool Number
Cap Kit (All) Obtain locally
Dial indicator with magnetic base Obtain locally
Turbo Oil Supply Block Off Plug Kit ZTSE4785
114 VARIABLE GEOMETRY TURBOCHARGER (VGT)
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 115

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

Air Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Power Steering/Fuel Pump and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Air Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Air Compressor Bracket and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120
Power Steering Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122
Power Steering/Fuel Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
All Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Power Steering/Fuel Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Power Steering Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Air Compressor Bracket and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
Air Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

116 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 117

Exploded Views
Air Compressor

Figure 159 Air compressor

1. Coolant return hose 7. Oil supply hose 13. M10 X 30 bolt (2)
2. Coolant supply hose 8. Air compressor gasket 14. M10 X 80 bolt
3. Hose clamp (6) 9. Oil return hose 15. Belt tensioner
4. M10 X 30 bolt (3) 10. Air compressor bracket 16. M10 X 120 bolt (3)
5. M10 X 45 bolt 11. Belt idler (2)
6. Air compressor 12. Idler dust cover (2)
118 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

Power Steering/Fuel Pump and Related

Components

Figure 160 Power steering/fuel pump and related components

1. Gear driven fuel pump assembly 7. Tube clamp plate (front) 12. Tube clamp pad (side)
2. M10 x 30 bolt (2) 8. M6 nut 13. Tube clamp saddle (side)
3. Tube clamp plate (side) 9. M8 x 30 stud bolt (2) 14. M6 nut (2)
4. Pressure power steering tube 10. M6 x 25 bolt 15. O-ring
5. Tube clamp saddle (front) 11. Suction power steering tube
6. Tube clamp pad (front) assembly
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 119

Removal Air Compressor

WARNING: To prevent personal injury or

death, read all safety instructions in the “Safety
Information” section of this manual.

WARNING: To prevent personal injury or

death, make sure the engine has cooled before
removing components.

WARNING: To prevent personal injury

or death, remove ground cable from negative
terminal of main battery before disconnecting
or connecting electrical components. Always
connect ground cable last.

WARNING: To prevent personal injury or Figure 161 Oil supply hose fitting nut
death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing 1. Loosen oil supply hose fitting nut and disconnect
and rags contaminated with engine fluids. hose from air compressor.

GOVERNMENT REGULATION: Engine

fluids (oil, fuel, and coolant) may be a threat
to the environment. Recycle or dispose
of engine fluids according to applicable
regulations. Never put engine fluids in the
trash, on the ground, in sewers or bodies of
water.

GOVERNMENT REGULATION: Dispose

of fuel according to applicable regulations in
a correct container clearly marked DIESEL Figure 162 Air compressor coolant hoses
FUEL.
1. Coolant return hose
2. Coolant supply hose
NOTE: See the Engine Electrical sections for 3. Hose clamp (2)
information on removal of components prior to this
section.
2. Remove two hose clamps and disconnect air
compressor coolant hoses.
120 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

5. Remove air compressor.

6. Remove and discard air compressor gasket.

Air Compressor Bracket and Components

Figure 163 Air compressor to bracket rear bolts

1. M10 x 45 bolt
2. M10 x 30 bolt

3. Remove M10 x 45 and M10 x 30 air compressor

to bracket rear bolts. Figure 165 Air compressor oil return hose
1. Oil return hose
2. Hose clamp

1. Remove hose clamp and disconnect air

compressor oil return hose.

Figure 164 Air compressor to bracket front bolts

1. M10 x 30 bolt (2)
2. Air compressor bracket

4. Remove two M10 x 30 air compressor to bracket

front bolts. Figure 166 Air compressor belt tensioner
1. M10 x 80 bolt
WARNING: To prevent personal injury or 2. Belt tensioner
death, get help when removing or installing the
air compressor.
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 121

CAUTION: To prevent engine damage, do not twist 3. Remove two M10 x 30 bolts.
the belt tensioner; damage to the locating pin may
4. Remove two idler dust covers and two belt idlers.
occur, resulting in improper alignment of the belt
tensioner.
2. Remove M10 x 80 bolt and air compressor belt
tensioner.

Figure 168 Air compressor bracket to cylinder

head bolts
1. M10 x 120 bolt (3)
2. Air compressor bracket
Figure 167 Air compressor belt idlers
1. M10 x 30 bolt (2)
2. Idler dust cover (2) 5. Remove three M10 x 120 bolts and air
3. Belt idler (2) compressor bracket.
122 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

Power Steering Lines 3. Loosen suction power steering tube flared tube
nut.
4. Loosen pressure power steering tube flared tube
nut.
5. Disconnect power steering tubes from power
steering/fuel pump, and position power steering
tubes aside.
6. Cover power steering/fuel pump ports and ends of
power steering tubes with Cap Kit (page 129), to
keep out foreign material. If plastic caps are not
available, cover openings with tape.

Figure 169 Tube clamp saddle (side)

1. M6 nut (2)
2. Tube clamp saddle (side)

1. Remove two M6 nuts.

2. Remove side tube clamp saddle.

Figure 171 Tube clamp plate (front)

1. M6 x 25 bolt
2. Tube clamp plate (front)
3. M6 nut

NOTE: Support power steering tubes before removing

front tube clamp plate bolt and nut.
7. Remove M6 nut.
8. Remove M6 x 25 bolt.
9. Remove front tube clamp plate.
Figure 170 Power steering tubes to pump
connections 10. Release power steering tubes from tube clamp
pads and remove from engine.
1. Gear driven fuel pump assembly
2. Suction power steering tube flared tube nut
3. Pressure power steering tube flared tube nut
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 123

14. Remove side tube clamp plate.

Power Steering/Fuel Pump

Figure 172 Tube clamp saddle (front)

1. Fuel lines
2. M8 x 30 stud bolt (2)
3. Tube clamp pad (front)
4. Tube clamp saddle (front)
Figure 174 Mounting bolts for gear driven fuel
pump assembly
11. Slide tube clamp pad out of the front tube clamp
saddle and remove from fuel lines.
NOTE: The power steering/fuel pump is serviced
12. Remove two M8 x 30 stud bolts and front tube as a single unit.
clamp saddle.
1. Remove two M10 x 30 bolts and power
steering/fuel pump.

Figure 173 Tube clamp plate (side)

1. Tube clamp plate (side) Figure 175 Gear driven fuel pump assembly
2. M6 nut O-ring

13. Remove M6 side tube clamp plate nut. 2. Remove and discard O-ring.
124 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

Cleaning
All Components
1. Clean foreign material from gasket surfaces of air
compressor and air compressor bracket. Use a
scraper to remove gasket from gasket surfaces.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Wash air compressor bracket. Dry with filtered
compressed air.
3. Wash power steering/fuel pump gear with a stiff
brush and a nonchlorinated solvent. Dry with
filtered compressed air. Figure 177 Mounting bolts for gear driven fuel
pump assembly

2. Install power steering/fuel pump on the rear cover

Installation and secure with two M10 x 30 bolts.
Power Steering/Fuel Pump
3. Tighten bolts to standard torque (page 383).

Power Steering Lines

Figure 176 Gear driven fuel pump assembly

O-ring

Figure 178 Tube clamp plate (side)

1. Install a new power steering/fuel pump O-ring.
1. Tube clamp plate (side)
2. M6 nut

1. Install side tube clamp plate and secure with M6

nut.
2. Tighten tube clamp plate nut to standard torque
(page 383).
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 125

Figure 179 Tube clamp saddle (front) Figure 180 Tube clamp plate (front)
1. Fuel lines 1. M6 x 25 bolt
2. M8 x 30 stud bolt (2) 2. Tube clamp plate (front)
3. Tube clamp pad (front) 3. M6 nut
4. Tube clamp saddle (front)

8. Install front tube clamp plate and secure with M6

3. Install front tube clamp saddle and secure with two x 25 bolt and M6 nut. Do not tighten at this time.
M8 x 30 stud bolts.
4. Tighten stud bolts to special torque (page 129).
5. Install side tube clamp pad on power steering
tubes.
6. Install front tube clamp pad on fuel lines and slide
tube clamp pad inside the front tube clamp saddle.
7. Install power steering tubes in front tube clamp
pad, and position power steering tubes and side
tube clamp pad inside the side tube clamp plate.

Figure 181 Power steering tubes to pump

connections
1. Gear driven fuel pump assembly
2. Suction power steering tube flared tube nut
3. Pressure power steering tube flared tube nut

9. Remove all the plastic caps or tape from power

steering/fuel pump and power steering tubes.
126 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

10. Connect power steering tubes to power Air Compressor Bracket and Components
steering/fuel pump, and secure with flared tube
nuts.
11. Tighten suction power steering tube flared tube
nut to special torque (page 129).
12. Tighten pressure power steering tube flared tube
nut to special torque (page 129).

Figure 183 Air compressor bracket to cylinder

head bolts
1. M10 x 120 bolt (3)
2. Air compressor bracket

1. Install and secure air compressor bracket with

Figure 182 Tube clamp saddle (side) three M10 x 120 bolts.
1. M6 nut (2) 2. Tighten bolts to special torque (page 129).
2. Tube clamp saddle (side)

13. Install side tube clamp saddle.

14. Install two M6 nuts and tighten to standard torque
(page 383).
15. Tighten front tube clamp saddle M6 x 25 bolt and
M6 nut to standard torque (page 383).

Figure 184 Air compressor belt idlers

1. M10 x 30 bolt (2)
2. Idler dust cover (2)
3. Belt idler (2)

3. Install belt idlers and idler dust covers, and secure

with two M10 x 30 bolts.
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 127

4. Tighten bolts to special torque (page 129).

Figure 187 Air compressor oil return hose

1. Oil return hose
Figure 185 Air compressor belt tensioner
2. Hose clamp
alignment
1. Alignment hole
2. Belt tensioner dowel 7. Connect air compressor oil return hose and
secure with hose clamp.

5. Align belt tensioner dowel with alignment hole in

air compressor bracket, and install belt tensioner. Air Compressor

Figure 186 Air compressor belt tensioner Figure 188 Air compressor to bracket front bolts
1. M10 x 80 bolt 1. M10 x 30 bolts (2)
2. Belt tensioner 2. Air compressor bracket

6. Install M10 x 80 bolt and tighten to special torque

(page 129). WARNING: To prevent personal injury or
death, get help when removing or installing the
air compressor.
128 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP

1. Place a new air compressor gasket and air

compressor on the air compressor bracket.
2. Secure air compressor to bracket with two front
M10 x 30 bolts. Do not tighten bolts at this time.

Figure 190 Air compressor coolant hoses

1. Coolant return hose
2. Coolant supply hose
3. Hose clamp (2)

Figure 189 Air compressor to bracket rear bolts

5. Connect air compressor coolant hoses and
1. M10 x 45 bolt
secure with hose clamps.
2. M10 x 30 bolt

3. Install M10 x 45 and M10 x 30 air compressor to

bracket rear bolts.
4. Tighten all four air compressor to bracket bolts to
special torque (page 129).

Figure 191 Oil supply hose fitting nut

6. Connect oil supply hose to air compressor.

7. Tighten oil supply hose fitting nut to special torque
(page 129).
 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP 129

Special Torque
Table 11 Air Compressor and Power Steering/Fuel Pump
Air compressor to bracket bolts 72 N·m (53 lbf·ft)
Air compressor bracket to cylinder head bolts 61 N·m (45 lbf·ft)
Air compressor belt tensioner bolt 61 N·m (45 lbf·ft)
Air compressor idler bolts 61 N·m (45 lbf·ft)

Air compressor oil supply hose fitting nut 20 N·m (177 lbf·in)

Suction power steering tube flared tube nut 166 N·m (122 lbf·ft)
Pressure power steering tube flared tube nut 87 N·m (64 lbf·ft)
Tube clamp saddle stud bolts (front) 31 N·m (23 lbf·ft)
Air compressor pulley nut 120 N·m (88 lbf·ft)

Special Service Tools

Table 12 Power Steering/Fuel Pump
Description Tool Number
Cap Kit (All) ZTSE4610
130 AIR COMPRESSOR AND POWER STEERING/FUEL PUMP
 FUEL SYSTEM 131

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .133

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Primary Fuel Filter Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
Secondary Fuel Filter Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
Primary Fuel Filter Assembly and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
Fuel Primer Pump Assembly and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141
Secondary Fuel Filter and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143
Tubing to High-pressure Fuel Pump (HPFP) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
High-pressure Fuel Pump Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150
Fuel Cooler Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152
Fuel Injectors and Fuel Rail to Injectors Tube Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .152

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
Fuel Injectors and Fuel Rail to Injectors Tube Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
Fuel Cooler Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
High-pressure Fuel Pump Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .154
Tubing to High-pressure Fuel Pump (HPFP) Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
Secondary Fuel Filter and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .160
Fuel Primer Pump Assembly and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
Primary Fuel Filter Assembly and Tubing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .165
Secondary Fuel Filter Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167
Primary Fuel Filter Element. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .167

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .169

132 FUEL SYSTEM
 FUEL SYSTEM 133

Exploded Views

Figure 192 Primary fuel filter assembly and tubing

1. Fuel return from primer pump 9. Fuel return to tank tube 16. Element and bowl primary filter
tube assembly assembly seal
2. M8 x 30 bolt (2) 10. Flat clamp 17. Primary filter element assembly
3. Fuel primer pump assembly 11. Saddle clamp 18. Fuel filter primary header
4. Fuel supply to primer pump tube 12. M6 x 12 bolt 19. Primary fuel filter to pump tube
assembly 13. Fuel supply tube assembly assembly
5. Triple tube clamp 14. Fuel drain valve 20. Gear driven fuel pump assembly
6. M8 x 30 stud bolt 15. Bowl assembly with fuel
7. M10 x 30 bolt (4) heater/probe
8. Primary filter bracket support
134 FUEL SYSTEM

Figure 193 Secondary fuel filter and tubing

1. M6 x 45 stud bolt (2) 8. Fuel return to tank tube 14. Filter to pump tube assembly
2. M6 x 45 bolt assembly
3. Fuel filter cap 9. 3/8” hose assembly (2)
4. O-ring 10. Fuel supply to filter tube
5. Fuel filter element assembly
6. Fuel filter housing 11. M6 nut
7. Fuel cooler to filter tube 12. Triple tube clamp
assembly 13. Cooler support bracket assembly
 FUEL SYSTEM 135

Figure 194 High-pressure Fuel Pump (HPFP) assembly and tubing

1. Filter to pump tube assembly 9. Injector leak off check valve 17. Injector return tube assembly
2. M6 nut (4) 10. M6 x 25 bolt (5) 18. M12 banjo bolt (2)
3. Pump right tube assembly 11. M6 x 12 bolt 19. M6 x 10 bolt (2)
4. M6 x 16 bolt (2) 12. Pump cover gasket
5. Pump left tube assembly 13. Pump cover gasket with
6. M12 cap nut (2) connectors
7. M12 Bonded seal washer (8) 14. M10 x 55 bolt (3)
8. High-pressure pump to cooler 15. HPFP assembly
tube assembly 16. Fuel pump cover
136 FUEL SYSTEM

Figure 195 Fuel cooler assembly (typical)

1. Cooler support bracket assembly 7. M12 bonded seal washer (4) 12. Fuel return to tank tube
2. M10 x 20 bolt (4) 8. M12 banjo bolt (2) assembly
3. Fuel cooler assembly 9. Fuel cooler to filter tube 13. Hose clamp (4)
4. M8 nut (4) assembly 14. Coolant-in hose
5. High-pressure pump to cooler 10. Triple tube clamp 15. Coolant-out from fuel cooler
tube assembly 11. Fuel supply to filter tube hose
6. M6 nut (4) assembly 16. Clamp (2)
 FUEL SYSTEM 137

Figure 196 Fuel line sleeve — High-pressure Figure 197 Fuel line sleeve (primer pump tubes)
pump to cooler tube assembly 1. Fuel line sleeve (2)
1. Fuel line sleeve (4) 2. Fuel return from primer pump tube assembly
2. Fuel cooler assembly 3. Fuel primer pump assembly
3. High-pressure pump to cooler tube assembly 4. Primary fuel filter assembly
5. Fuel supply to primer pump tube assembly
138 FUEL SYSTEM

Removal NOTE: See the following service sections for

information on removal of components prior to
this section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Air Compressor and Power Steering/Fuel Pump
with applicable regulations. Recycle
or dispose of engine fluids, filters, and Primary Fuel Filter Element
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the "Safety
Information" section of this manual.

WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing
diagnostic or service procedures.

WARNING: To prevent personal injury or

death, disconnect the main battery negative
terminal before disconnecting or connecting Figure 198 Primary filter element assembly
electrical components. 1. Primary filter element assembly
2. Bowl assembly with fuel heater/probe
WARNING: To prevent personal injury or 3. Fuel drain valve
death, wear safety glasses with side shields. 4. Water in Fuel (WIF) sensor electrical connector
Limit compressed air pressure to 207 kPa (30 psi). 5. Fuel heater electrical connector

WARNING: To prevent personal injury or

1. Disconnect fuel heater electrical connector.
death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash 2. Disconnect WIF sensor electrical connector.
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids. WARNING: To prevent personal injury
or death, dispose of fuel in a container
WARNING: To prevent personal injury or marked DIESEL FUEL, according to applicable
death, do not smoke and keep fuel away from regulations.
flames and sparks. 3. Place a suitable container under bowl assembly
to catch draining fuel.
4. Turn fuel drain valve counterclockwise to drain
fuel.
5. Rotate bowl assembly clockwise and remove from
filter element. Use an oil filter wrench if necessary.
 FUEL SYSTEM 139

Primary Fuel Filter Assembly and Tubing

WARNING: To prevent personal injury

or death, dispose of fuel in a container
marked DIESEL FUEL, according to applicable
regulations.
1. Place a suitable container under bowl assembly
to catch draining fuel.

Figure 199 Element and bowl primary filter seal

6. Remove and discard bowl primary filter seal.

7. Remove primary filter element assembly. Use an
oil filter wrench if necessary.

Secondary Fuel Filter Element

Figure 201 Fuel drain valve

2. Turn fuel drain valve counterclockwise to drain

fuel.

Figure 200 Fuel filter cap

1. Remove fuel filter cap by turning it

counterclockwise.
Figure 202 Primary fuel filter to pump tube
2. Remove and discard fuel filter cap O-ring.
assembly
3. Lift fuel filter element from fuel filter housing.

3. Push tab to release fitting, and disconnect primary

fuel filter to pump tube assembly.
140 FUEL SYSTEM

Figure 203 Primer pump tubes connection Figure 204 Primary filter bracket support clamp
1. 3/8” O-ring face seal nut (2) 1. 3/8” O-ring face seal nut
2. Fuel return from primer pump tube assembly 2. Saddle clamp
3. Fuel supply to primer pump tube assembly 3. M6 x 12 bolt

4. Loosen 3/8” O-ring face seal nut on fuel return 8. Remove M6 x 12 bolt.
from primer pump tube assembly.
9. Remove saddle clamp and flat clamp.
5. Loosen 3/8” O-ring face seal nut on fuel supply to
10. Loosen 3/8” O-ring face seal nut and disconnect
primer pump tube assembly.
fuel supply tube assembly.
6. Disconnect fuel supply to primer pump tube
assembly and fuel return from primer pump tube
assembly.
7. Cover ports and ends of tubes with Fuel System
Caps (page 169). If plastic caps are not available,
cover openings with tape.

Figure 205 Fuel filter primary header to primary

filter bracket support bolts
1. Fuel filter primary header
2. M10 x 30 bolt (2)

11. Remove two M10 x 30 bolts and fuel filter primary

header.
 FUEL SYSTEM 141

13. Remove two M10 x 30 bolts and primary filter

bracket support.

Fuel Primer Pump Assembly and Tubing

Figure 206 Fuel filter primary header O-rings

12. Remove and discard two O-rings.

Figure 208 Fuel primer pump assembly tube

connections
1. Fuel primer pump assembly
2. 3/8” O-ring face seal nut (2)

1. Loosen two 3/8” O-ring face seal nuts.

2. Disconnect fuel supply to primer pump tube
assembly and fuel return from primer pump tube
assembly.
3. Cover ports and ends of tubes with Fuel System
Caps (page 169). If plastic caps are not available,
cover openings with tape.
Figure 207 Primary filter bracket support bolts
1. Primary filter bracket support
2. M10 x 30 bolt (2)
142 FUEL SYSTEM

Figure 209 Fuel primer pump assembly bolts Figure 211 Triple tube clamp
1. M8 x 30 bolt (2) 1. Triple tube clamp
2. Fuel primer pump assembly 2. M8 x 30 stud bolt

4. Remove two M8 x 30 bolts and fuel primer pump 6. Remove M8 x 30 stud bolt.
assembly.
7. Remove triple tube clamp.
8. Remove fuel return from primer pump tube
assembly.
9. Remove fuel supply to primer pump tube
assembly.

Figure 210 Fuel primer pump assembly O-rings

5. Remove and discard two O-rings.

 FUEL SYSTEM 143

Secondary Fuel Filter and Tubing

Figure 213 Fuel filter housing O-rings

1. Fuel filter housing
Figure 212 Fuel supply and return tubing
2. O-ring (3)
1. Fuel supply to filter tube assembly
2. 3/8” O-ring face seal nut (3)
3. Fuel cooler to filter tube assembly 7. Remove and discard three O-rings.
4. Fuel return to tank tube assembly

WARNING: To prevent personal injury

or death, dispose of fuel in a container
marked DIESEL FUEL, according to applicable
regulations.
1. Place a suitable container under tube connections
to catch draining fuel.
2. Loosen three 3/8” O-ring face seal nuts.
3. Disconnect fuel supply to filter tube assembly.
4. Disconnect fuel cooler to filter tube assembly.
5. Disconnect fuel return to tank tube assembly.
Figure 214 Filter to pump tube assembly
6. Cover ports and ends of tubes with Fuel System
connection
Caps (page 169). If plastic caps are not available,
cover openings with tape. 1. Filter to pump tube assembly
2. Fitting release ring

8. Pull fitting release ring toward tube to release

fitting lock, and disconnect filter to pump tube
assembly from fuel filter housing.
144 FUEL SYSTEM

9. Cover port on fuel filter housing and end of filter

to pump tube assembly with Fuel System Caps
(page 169). If plastic caps are not available, cover
openings with tape.

Figure 216 Fuel supply and return tube

connections
1. Fuel supply to filter tube
2. Fuel return to tank tube assembly
3. 3/8” redundant clip (4)
Figure 215 Secondary fuel filter assembly bolts
4. 3/8” hose assembly (2)
1. Secondary fuel filter assembly 5. Fuel return tube assembly
2. M6 x 45 bolt 6. Fuel supply tube assembly
3. M6 x 45 stud bolt (2)

12. Remove four 3/8” redundant clips.

10. Remove two M6 x 45 stud bolts and M6 x 45 bolt.
13. Use a Spring Lock Coupling Disconnect Tool
11. Remove secondary fuel filter assembly. (page 169) to disconnect and remove fuel return
tube assembly and fuel supply tube assembly
from 3/8” hose assemblies.
14. Use a Spring Lock Coupling Disconnect Tool
(page 169) to disconnect and remove 3/8” hose
assemblies from fuel return to tank tube assembly
and fuel supply to filter tube.
 FUEL SYSTEM 145

Figure 217 Coolant out from fuel cooler hose Figure 218 Fuel cooler to filter tube assembly
connection
1. Hose clamp
2. Clamp 1. M12 banjo bolt
3. Coolant out from fuel cooler hose 2. M12 bonded seal washer (2)
4. M6 nut 3. Fuel cooler to filter tube assembly
5. Front crankcase cover

18. Remove M12 banjo bolt and disconnect fuel

15. Remove M6 nut and release clamp. cooler to filter tube assembly.
19. Remove and discard two M12 bonded seal
WARNING: To prevent personal injury or washers.
death, make sure the engine has cooled before
draining coolant. 20. Cover fuel cooler port and end of fuel cooler to
filter tube with Fuel System Caps (page 169). If
16. Place a suitable container under coolant out hose plastic caps are not available, cover openings with
to catch draining coolant. tape.
17. Loosen hose clamp and disconnect coolant out
hose from front crankcase cover fitting.
146 FUEL SYSTEM

Tubing to High-pressure Fuel Pump (HPFP)

Assembly

Figure 219 Triple tube clamp

1. Triple tube clamp
2. M6 nut
Figure 220 Heat shields
1. Left heat shield
21. Remove M6 nut. 2. M6 x 12 bolt (3)
3. Right heat shield
22. Remove triple tube clamp.
4. M6 nut (2)
23. Remove fuel cooler to filter tube assembly.
24. Remove fuel return to tank tube assembly.
1. Remove three M6 x 12 heat shield bolts.
25. Remove fuel supply to filter tube assembly.
2. Remove two M6 heat shield nuts.
3. Remove right and left heat shields.
 FUEL SYSTEM 147

5. Remove M12 cap nut.

6. Remove filter to pump tube assembly.
7. Remove and discard two M12 bonded seal
washers from filter to pump tube assembly.
8. Cover fuel pump port and end of filter to pump
tube with Fuel System Caps (page 169). If plastic
caps are not available, cover openings with tape.

Figure 221 Filter to pump tube assembly

1. M6 nut (2)
2. Filter to pump tube assembly
3. M12 cap nut

4. Remove two M6 nuts.

Figure 223 Pump right tube assembly

1. Tube nut (2)
2. M6 x 16 bolt
3. Pump right tube assembly

9. Loosen two tube nuts.

10. Remove M6 x 16 bolt.

WARNING: To prevent personal injury or

death, whenever any fuel line (tubing) in the
high-pressure fuel system is removed, it must be
replaced with new.
Figure 222 Filter to pump tube assembly, M12 11. Remove and discard pump right tube assembly.
cap nut, and M12 bonded seal washers
12. Cover fuel pump and fuel rail ports with Fuel
1. M12 cap nut System Caps (page 169). If plastic caps are not
2. Filter to pump tube assembly available, cover openings with tape.
3. M12 bonded seal washer (2)
148 FUEL SYSTEM

Figure 224 Pump left tube assembly Figure 225 Injector return tube assembly
1. Tube nut (2) 1. M6 nut (2)
2. M6 x 16 bolt 2. Injector leak off check valve
3. Pump left tube assembly 3. 3/8” O-ring face seal nut
4. Injector return tube assembly
5. M12 banjo bolt (2)
13. Loosen two tube nuts. 6. M6 x 10 bolt (2)
14. Remove M6 x 16 bolt.
17. Use a wrench to hold injector leak off check valve
WARNING: To prevent personal injury or in place, and loosen 3/8” O-ring face seal nut.
death, whenever any fuel line (tubing) in the
high-pressure fuel system is removed, it must be
replaced with new.
15. Remove and discard pump left tube assembly.
16. Cover fuel pump and fuel rail ports with Fuel
System Caps (page 169). If plastic caps are not
available, cover openings with tape.

Figure 226 Injector return tube assembly,

bonded seal washers, and banjo bolts
1. Injector return tube assembly
2. M12 bonded seal washer (4)
3. M12 banjo bolt (2)

18. Remove two M12 banjo bolts.

 FUEL SYSTEM 149

19. Remove and discard four M12 bonded seal

washers.
20. Remove two M6 x 10 bolts.
21. Remove two M6 nuts.
22. Remove injector return tube assembly.
23. Cover ports and ends of tube with Fuel System
Caps (page 169). If plastic caps are not available,
cover openings with tape.

Figure 228 High-pressure pump to cooler tube

assembly (upper connection)
1. High-pressure pump to cooler tube assembly
2. M12 cap nut
3. M6 x 12 bolt

28. Remove M12 cap nut.

Figure 227 High-pressure pump to cooler tube

assembly (lower connection)
1. M6 nut (2)
2. High-pressure pump to cooler tube assembly
3. M12 banjo bolt
4. M12 bonded seal washer (2)

24. Remove M12 banjo bolt.

25. Remove and discard two M12 bonded seal
washers from high-pressure pump to cooler tube
assembly.
Figure 229 High-pressure pump to cooler tube
26. Cover fuel cooler port and end of tube with Fuel
assembly, M12 cap nut, and M12 bonded seal
System Caps (page 169). If plastic caps are not
washers
available, cover openings with tape.
1. M12 cap nut
27. Remove M6 high-pressure pump to cooler tube
2. M12 bonded seal washer (2)
assembly clamp nut.
3. High-pressure pump to cooler tube assembly

29. Remove M6 x 12 high-pressure pump to cooler

tube assembly clamp bolt.
30. Remove high-pressure pump to cooler tube
assembly.
150 FUEL SYSTEM

31. Remove and discard two M12 bonded seal High-pressure Fuel Pump Assembly
washers from high-pressure pump to cooler tube
assembly.
32. Cover fuel pump port and ends of tube with Fuel
System Caps (page 169). If plastic caps are not
available, cover openings with tape.

Figure 231 Fuel pump cover bolts

1. M6 x 25 bolt (5)
2. Fuel pump cover

Figure 230 Injector leak off check valve

1. Remove five M6 x 25 bolts and fuel pump cover.
1. High-pressure pump to cooler tube assembly
2. Injector leak off check valve

33. Only if required for replacement, use a wrench to

hold high-pressure pump to cooler tube assembly,
and remove injector leak off check valve.

Figure 232 Pump cover gasket with connectors

1. Electrical connector (2)
2. Pump cover gasket with connectors

2. Disconnect two electrical connectors.

3. Remove and discard pump cover gasket with
connectors.
 FUEL SYSTEM 151

Figure 233 Pump cover gasket Figure 235 High-pressure fuel pump gear
1. Index hole
2. Fuel pump gear bolt
4. Remove and discard pump cover gasket.
3. Fuel pump gear washer
4. Fuel pump gear
5. High-pressure fuel pump assembly with dowels

NOTE: Do steps 6–8 only, if replacing the

high-pressure pump gear.
6. Insert a 1/4 inch steel punch into the index hole on
the high-pressure fuel pump assembly to prevent
the fuel pump gear from turning.
NOTE: The fuel pump gear bolt has left-hand
threads.
7. Remove fuel pump gear bolt and washer.
8. Remove fuel pump gear.

Figure 234 HPFP assembly

1. M10 x 55 bolt (3)
2. HPFP assembly

NOTE: Care must be taken to not drop the bolts

into the crankcase.
5. Remove three M10 x 55 bolts and HPFP
assembly.
152 FUEL SYSTEM

Fuel Cooler Assembly 4. Remove four M8 nuts.

5. Remove fuel cooler assembly.

Figure 236 Fuel cooler assembly coolant hoses

1. M6 nut Figure 238 Cooler support bracket assembly
2. Clamp
1. M10 x 20 bolt (4)
3. Hose clamp (2)
2. Cooler support bracket assembly
4. Coolant-in hose
5. Coolant-out from fuel cooler hose
6. Remove four M10 x 20 bolts and cooler support
bracket assembly.
1. Remove M6 nut and clamp.
2. Loosen two hose clamps.
Fuel Injectors and Fuel Rail to Injectors Tube
3. Disconnect coolant-in hose and coolant-out hose Assemblies
from fuel cooler assembly.
NOTE: See Fuel Injector and Rail Assemblies
(page 225) for removal procedures.

Inspection
1. Inspect fuel tubes for damage. Replace if
necessary.
2. Inspect fuel line sleeves for damage. Replace if
necessary.

Figure 237 Fuel cooler assembly nuts

1. M8 nut (4)
2. Fuel cooler assembly
 FUEL SYSTEM 153

Installation
Fuel Injectors and Fuel Rail to Injectors Tube
Assemblies
NOTE: See Fuel Injector and Rail Assemblies
(page 253) for installation procedures.
Fuel Cooler Assembly

Figure 240 Fuel cooler assembly nuts

1. M8 nut (4)
2. Fuel cooler assembly

3. Install fuel cooler assembly and four M8 nuts.

4. Tighten nuts to standard torque (page 383).
Figure 239 Cooler support bracket assembly
1. M10 x 20 bolt (4)
2. Cooler support bracket assembly

1. Install cooler support bracket assembly and four

M10 x 20 bolts.
2. Tighten bolts to standard torque (page 383).

Figure 241 Fuel cooler assembly coolant hoses

1. M6 nut
2. Clamp
3. Hose clamp (2)
4. Coolant-in hose
5. Coolant-out from fuel cooler hose

5. Connect coolant-in hose and coolant-out hose to

fuel cooler assembly. Do not tighten hose clamps
at this time.
154 FUEL SYSTEM

6. Install clamp and M6 nut. Do not tighten at this

time.
7. Position coolant-in hose to maintain
approximately 25.4 mm (1.0 in) clearance to
exhaust manifold heat shield.
8. Tighten M6 clamp nut to standard torque (page
383).
9. Tighten two hose clamps to special torque (page
169).

High-pressure Fuel Pump Assembly

Figure 243 HPFP assembly

1. M10 x 55 bolt (3)
2. HPFP assembly

NOTE: Care must be taken to not drop the bolts

into the crankcase.
5. Lower HPFP assembly into crankcase and secure
with three M10 x 55 bolts. Tighten bolts to special
torque (page 169).

Figure 242 High-pressure fuel pump gear

1. Index hole
2. Fuel pump gear bolt
3. Fuel pump gear washer
4. Fuel pump gear
5. High-pressure fuel pump assembly with dowels

NOTE: The fuel pump gear bolt has left-hand

threads.
1. Install fuel pump gear.
2. Install fuel pump gear bolt and washer.
Figure 244 Liquid Gasket (RTV) application
3. Insert a 1/4 inch steel punch into the index hole on
the high-pressure fuel pump assembly to prevent
the fuel pump gear from turning.
6. Apply Liquid Gasket (RTV) (page 169) to joining
4. Tighten gear bolt (counterclockwise) to special surfaces of crankcase and crankcase rear cover
torque (page 169). assembly.
 FUEL SYSTEM 155

Figure 245 Pump cover gasket with connectors Figure 247 Fuel pump cover bolts
1. Electrical connector (2) 1. M6 x 25 bolt (5)
2. Pump cover gasket with connectors 2. Fuel pump cover

7. Install a new pump cover gasket with connectors 9. Install fuel pump cover and five M6 x 25 bolts.
and connect the two electrical connectors. Tighten bolts to special torque (page 169).

Tubing to High-pressure Fuel Pump (HPFP)

Assembly

Figure 246 Pump cover gasket

8. Install a new pump cover gasket. Figure 248 Injector leak off check valve
1. High-pressure pump to cooler tube assembly
2. Injector leak off check valve

1. If previously removed, install injector leak off

check valve onto high-pressure pump to cooler
tube assembly.
156 FUEL SYSTEM

2. Use a wrench to hold high-pressure pump to

cooler tube assembly, and tighten injector leak off
check valve to special torque (page 169).

Figure 250 High-pressure pump to cooler tube

assembly (upper connection)
1. High-pressure pump to cooler tube assembly
Figure 249 High-pressure pump to cooler tube 2. M12 cap nut
assembly, M12 cap nut, and M12 bonded seal 3. M6 x 12 bolt
washer
1. M12 cap nut 3. Install a two new M12 bonded seal washers on
2. M12 bonded seal washer (2) high-pressure pump to cooler tube assembly
3. High-pressure pump to cooler tube assembly fitting connecting to HPFP assembly.
4. Install high-pressure pump to cooler tube
assembly.
 FUEL SYSTEM 157

5. Install M6 x 12 high-pressure pump to cooler tube

assembly clamp bolt. Tighten bolt to standard
torque (page 383).
6. Install M12 cap nut. Tighten cap nut to special
torque (page 169).

Figure 252 Injector return tube assembly

1. M6 nut (2)
2. Injector leak off check valve
3. 3/8” O-ring face seal nut
4. Injector return tube assembly
5. M12 banjo bolt (2)
Figure 251 High-pressure pump to cooler tube 6. M6 x 10 bolt (2)
assembly (lower connection)
1. M6 nut (2) 10. Install injector return tube assembly.
2. High-pressure pump to cooler tube assembly
11. Loosely install two M6 nuts and two M6 x 10 bolts.
3. M12 banjo bolt
Do not tighten at this time.
4. M12 bonded seal washer (2)
12. Hand start and seat 3/8” O-ring face seal nut onto
injector leak off check valve.
7. Install M6 clamp nut. Tighten nut to standard
NOTE: When using a crowfoot extension make
torque (page 383).
sure to adjust the torque settings as necessary
8. Install two new M12 bonded seal washers (one to compensate for any length added to the torque
each side of banjo fitting) on high-pressure pump wrench. See Appendix B - Torques (page 384).
to cooler tube assembly.
13. Use a wrench to hold injector leak off check valve
9. Install M12 banjo bolt. Tighten banjo bolt to and, with a crowfoot torque wrench, tighten 3/8”
special torque (page 169). O-ring face seal nut to special torque (page 169).
158 FUEL SYSTEM

Figure 253 Injector return tube assembly,

bonded seal washers, and banjo bolts Figure 254 Pump left tube assembly

1. Injector return tube assembly 1. Tube nut (2)

2. M12 bonded seal washer (4) 2. M6 x 16 bolt
3. M12 banjo bolt (2) 3. Pump left tube assembly

14. Install four M12 bonded seal washers on injector

return tube assembly. WARNING: To prevent personal injury or
death, whenever any fuel line (tubing) in the
15. Install two M12 banjo bolts. Tighten banjo bolts to high-pressure fuel system is removed, it must be
special torque (page 169). replaced with new.
16. Tighten two M6 x 10 bolts to standard torque 18. Position new pump left tube assembly between
(page 383). HPFP assembly and left fuel rail.
17. Tighten two M6 nuts to standard torque (page NOTE: Support pump left tube assembly while
383). hand tightening nuts to assure proper assembly
of joints.
NOTE: When using a crowfoot extension make
sure to adjust the torque settings as necessary
to compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
19. Hand start and seat tube assembly nuts onto
mating connections, then tighten with a crowfoot
torque wrench as follows:
a. Torque to 2 N·m (18 lbf·in).
b. Torque to 16 N·m (142 lbf·in).
c. Tighten nuts an additional 60°.
20. Install M6 x 16 bolt. Tighten bolt to standard
torque (page 383).
 FUEL SYSTEM 159

Figure 255 Pump right tube assembly Figure 256 Injector return tube assembly,
1. Tube nut (2) bonded seal washers, and banjo bolts
2. M6 x 16 bolt 1. M12 cap nut
3. Pump right tube assembly 2. Filter to pump tube assembly
3. M12 bonded seal washer

WARNING: To prevent personal injury or 24. Install two new M12 bonded seal washers on filter
death, whenever any fuel line (tubing) in the to pump tube assembly.
high-pressure fuel system is removed, it must be 25. Position filter to pump tube assembly..
replaced with new.
26. Install M12 cap nut.
21. Position new pump right tube assembly between
HPFP assembly and right fuel rail.
NOTE: Support pump right tube assembly while
hand tightening nuts to assure proper assembly
of joints.
NOTE: When using a crowfoot extension make
sure to adjust the torque settings as necessary
to compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
22. Hand start and seat tube assembly nuts onto
mating connections, then tighten with a crowfoot
torque wrench as follows:
a. Torque to 2 N·m (18 lbf·in).
b. Torque to 16 N·m (142 lbf·in).
c. Tighten nuts an additional 60°. Figure 257 Filter to pump tube assembly

23. Install M6 x 16 bolt. Tighten bolt to standard 1. M6 nut (2)

torque (page 383). 2. Filter to pump tube assembly
3. M12 cap nut

27. Install two M6 nuts. Tighten nuts to standard

torque (page 383).
160 FUEL SYSTEM

28. Tighten cap nut to special torque (page 169). Secondary Fuel Filter and Tubing

Figure 258 Heat shields Figure 259 Secondary fuel filter assembly bolts
1. Left heat shield 1. Secondary fuel filter assembly
2. M6 x 12 bolt (3) 2. M6 x 45 bolt
3. Right heat shield 3. M6 x 45 stud bolt (2)
4. M6 nut (2)

1. Install secondary fuel filter assembly.

29. Install left heat shield.
2. Install two M6 x 45 stud bolts. Tighten stud bolts
30. Install right heat shield. to standard torque (page 383).
31. Install three M6 x 12 heat shield bolts. Tighten 3. Install M6 x 45 bolt. Tighten bolt to standard
bolts to standard torque (page 383). torque (page 383).
32. Install two M6 heat shield nuts. Tighten nuts to
standard torque (page 383).

Figure 260 Triple tube clamp

1. Triple tube clamp
2. M6 nut
 FUEL SYSTEM 161

4. Install fuel supply to filter tube assembly, fuel

cooler to filter tube assembly, and fuel return to
tank tube assembly. Secure tubes with triple tube
clamp.
5. Loosely install M6 nut. Do not tighten at this time.

Figure 261 Filter to pump tube assembly

connection
1. Filter to pump tube assembly
2. Fitting release ring

6. Connect filter to pump tube assembly, and push

tube toward fuel filter housing to lock fitting.
162 FUEL SYSTEM

NOTE: When using a crowfoot extension make

sure to adjust the torque settings as necessary
to compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
8. Connect fuel cooler to filter tube assembly, fuel
supply to filter tube assembly, and fuel return to
tank tube assembly to fuel filter housing fittings.
Secure tubes with 3/8” O-ring face seal nuts.
Tighten nuts to special torque (page 169).
9. Tighten M6 triple tube clamp nut to standard
torque (page 383).

Figure 262 Fuel filter housing O-rings

1. Fuel filter housing
2. O-ring (3)

7. Install three new O-rings on fuel filter housing

fittings.

Figure 264 Fuel cooler to filter tube assembly

connection
1. Dual M12 banjo washer
2. M12 banjo bolt
3. Fuel cooler to filter tube assembly

10. Install a new dual M12 banjo washer on fuel cooler

to filter tube assembly.
11. Secure fuel cooler to filter tube assembly with M12
Figure 263 Fuel supply and return tubing banjo bolt. Tighten banjo bolt to special torque
1. Fuel supply to filter tube assembly (page 169).
2. 3/8” O-ring face seal nuts
3. Fuel cooler to filter tube assembly
4. Fuel return to tank tube assembly
 FUEL SYSTEM 163

14. Install four 3/8” redundant clips.

Figure 265 Fuel supply and return tube

connections
Figure 266 Coolant out from fuel cooler hose
1. Fuel supply to filter tube
2. Fuel return to tank tube assembly 1. Hose clamp
3. 3/8” redundant clip (4) 2. Clamp
4. 3/8” hose assembly (2) 3. Coolant out from fuel cooler hose
5. Fuel return tube assembly 4. M6 nut
6. Fuel supply tube assembly 5. Front crankcase cover

12. Connect 3/8” hose assemblies to fuel return to 15. Connect coolant out hose to front crankcase cover
tank tube assembly and fuel supply to filter tube fitting and secure with hose clamp. Tighten hose
assembly and push together until audible click is clamp to special torque (page 169).
heard.
16. Install clamp and M6 nut. Tighten nut to standard
13. Connect fuel return tube assembly and fuel supply torque (page 383).
tube assembly to 3/8” hose assemblies, and push
together until audible click is heard.
164 FUEL SYSTEM

Fuel Primer Pump Assembly and Tubing

Figure 269 Fuel primer pump assembly bolts

1. M8 x 30 bolt (2)
Figure 267 Triple tube clamp
2. Fuel primer pump assembly
1. Triple tube clamp
2. M8 x 30 stud bolt
5. Install fuel primer pump assembly and two M8 x 30
bolts. Tighten bolts to standard torque (page 383).
1. Install fuel return from primer tube assembly and
fuel supply to primer tube assembly in triple tube
clamp.
2. Install fuel primer tubes and triple tube clamp on
breather drain steel tube.
3. Secure triple tube clamp with M8 x 30 stud bolt.
Do not tighten stud bolt at this time.

Figure 270 Fuel primer pump assembly tube

connections
1. Fuel primer pump assembly
2. 3/8” O-ring face seal nut (2)

NOTE: When using a crowfoot extension make

Figure 268 Fuel primer pump assembly O-rings sure to adjust the torque settings as necessary
to compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
4. Install two new O-rings onto fuel primer pump
assembly.
 FUEL SYSTEM 165

6. Connect fuel supply to primer pump tube

assembly and fuel return from primer pump tube
assembly, and secure with two 3/8” O-ring face
seal nuts. Tighten nuts to special torque (page
169).
7. Tighten M8 x 30 triple tube clamp stud bolt to
standard torque (page 383).

Primary Fuel Filter Assembly and Tubing

Figure 272 Fuel filter primary header O-rings

2. Install two new O-rings onto fuel filter primary

header.

Figure 271 Primary filter bracket support bolts

1. Primary filter bracket support
2. M10 x 30 bolt (2)

1. Install primary filter bracket support and two

M10 x 30 bolts. Tighten bolts to standard torque
(page 383).

Figure 273 Fuel filter primary header to filter

bracket support bolts
1. Fuel filter primary header
2. M10 x 30 bolt (2)

3. Install fuel filter primary header and two M10 x 30

bolts. Tighten bolts to standard torque (page 383).
166 FUEL SYSTEM

Figure 274 Primary filter bracket support clamp Figure 275 Primer pump tubes connection
1. 3/8” O-ring face seal nut 1. 3/8” O-ring face seal nut (2)
2. Saddle clamp 2. Fuel return from primer pump tube assembly
3. M6 x 12 bolt 3. Fuel supply to primer pump tube assembly

NOTE: When using a crowfoot extension make NOTE: When using a crowfoot extension make
sure to adjust the torque settings as necessary sure to adjust the torque settings as necessary
to compensate for any length added to the torque to compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384). wrench. See Appendix B - Torques (page 384).
4. Connect fuel supply tube assembly to power 6. Connect fuel return from primer pump tube
steering/fuel pump and secure with 3/8” O-ring assembly and fuel supply to primer pump tube
face seal nut. Tighten nut to special torque (page assembly, and secure with two 3/8” O-ring face
169). seal nuts. Tighten nuts to special torque (page
169).
NOTE: Position and hold the fuel return tube
assembly into flat clamp while tightening the bolt.
5. Install flat clamp and saddle clamp, and secure
with M6 x 12 bolt. Tighten bolt to standard torque
(page 383).
 FUEL SYSTEM 167

Secondary Fuel Filter Element

1. Install a new fuel filter element in fuel filter
housing.
CAUTION: To prevent engine damage, do not add fuel
to the fuel filter housing; this can add contaminants to
the fuel.
2. Install a new O-ring on fuel filter cap.
CAUTION: To prevent engine damage, the fuel filter
element must be installed in the fuel filter housing.
NOTE: The engine will not run if the filter element
is not installed. The installed filter element opens
a check valve in the center of the stand pipe,
allowing fuel to flow.
Figure 276 Primary filter to pump tube assembly
3. Install fuel filter cap and tighten to special torque
(page 169).
7. Push primary filter to pump tube assembly fitting
into primary fuel filter. Make sure quick connector Primary Fuel Filter Element
is locked in place.

Figure 278 Element and bowl primary filter seal

Figure 277 Fuel drain valve

1. Install a new bowl primary filter seal onto bowl

8. Close fuel drain valve by turning it clockwise. assembly.
168 FUEL SYSTEM

2. Install a new primary filter element assembly and

hand tighten firmly.
3. Install bowl assembly and hand tighten firmly.
4. Close fuel drain valve by turning it clockwise.
5. Connect fuel heater electrical connector.
6. Connect WIF sensor electrical connector.

Figure 279 Primary filter element assembly

1. Primary filter element assembly
2. Bowl assembly with fuel heater/probe
3. Fuel drain valve
4. Water in Fuel (WIF) sensor electrical connector
5. Fuel heater electrical connector
 FUEL SYSTEM 169

Specifications
Table 13 Fuel Filter

Fuel Filter

Primary fuel filter type 10 micron with water separation

Secondary fuel filter type 4 micron with water separation
Normal fuel pressure (after secondary fuel
48 - 69 kPa (7 - 10 psi)
filter)

Special Torque
Table 14 Fuel System Components
High-pressure Fuel Pump (HPFP) assembly bolts 61 N·m (45 lbf·ft)
HPFP pump gear nut 78 N·m (57 lbf·ft)
Pump right tube assembly nuts See tightening step in procedure.
Pump left tube assembly nuts See tightening step in procedure.
Fuel pump cover bolts 13 N·m (116 lbf·in)
Injector leak off check valve 45 N·m (33 lbf·ft)
High-pressure pump to cooler tube assembly cap nut 38 N·m (28 lbf·ft)
Banjo bolts 38 N·m (28 lbf·ft)
Filter to pump tube assembly cap nut 38 N·m (28 lbf·ft)

Hose clamps 3 N·m (26 lbf·in)

3/8” O-ring face seal nuts 41 N·m (30 lbf·ft)

Fuel filter cap (secondary) 27 N·m (20 lbf·ft)

Special Service Tools

Table 15 Fuel System
Description Tool Number
Fuel System Caps ZTSE4710
Spring lock coupling disconnect tool Obtain locally
Liquid Gasket (RTV) (6 oz. tube) 1830858C1
170 FUEL SYSTEM
 INTAKE AND EXHAUST MANIFOLDS 171

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173

Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .173
Intake Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Left Exhaust Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .175
Right Exhaust Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Intake Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .177

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

Intake and Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Manifold Warp Test for Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179
Intake Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .179
Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
Right Exhaust Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .181
Left Exhaust Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184

172 INTAKE AND EXHAUST MANIFOLDS
 INTAKE AND EXHAUST MANIFOLDS 173

Exploded Views
Exhaust Manifolds

Figure 280 Left exhaust manifold (right side similar)

1. Exhaust manifold gasket 4. M8 nut 7. Heat shield threaded spacer (3)
2. Left exhaust manifold 5. M8 x 12 bolt (3) 8. M8 x 40 bolt (4)
3. M8 x 40 stud bolt (4) 6. Heat shield
174 INTAKE AND EXHAUST MANIFOLDS

Intake Manifold

Figure 281 Intake manifold

1. M6 x 87 stud bolt (6) 5. M6 x 87 bolt 8. Exhaust Gas Recirculation
2. M6 x 95 bolt (4) 6. Intake manifold gasket (2) (EGR) cooler lower bracket
3. M6 x 95 stud bolt 7. Intake manifold 9. M6 x 47 stud bolt
4. M6 x 70 bolt (3)
 INTAKE AND EXHAUST MANIFOLDS 175

Removal Exhaust Manifolds

CAUTION: To prevent engine damage, do not reuse
exhaust manifold bolts and stud bolts.
GOVERNMENT REGULATION: Engine Left Exhaust Manifold
fluids (oil, fuel, and coolant) may be a hazard
to human health and the environment.
Handle all fluids and other contaminated
materials (e.g. filters, rags) in accordance
with applicable regulations. Recycle
or dispose of engine fluids, filters, and
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the "Safety
Information" section of this manual.

WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing Figure 282 Left exhaust manifold heat shield
diagnostic or service procedures. 1. M8 nut
2. M8 x 12 bolt (3)
WARNING: To prevent personal injury or 3. Heat shield
death, disconnect the main battery negative
terminal before disconnecting or connecting
electrical components. 1. Remove and discard three M8 x 12 heat shield
bolts and M8 heat shield nut.

WARNING: To prevent personal injury or 2. Remove left exhaust manifold heat shield.
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.
NOTE: See the following service sections for
information on removal of components prior to
this section.
• Engine Electrical
• Exhaust Gas Recirculation (EGR) System
• Variable Geometry Turbocharger (VGT)
Figure 283 Left exhaust manifold heat shield
• Air Compressor and Power Steering/Fuel Pump spacers
• Fuel System
176 INTAKE AND EXHAUST MANIFOLDS

3. Remove three left exhaust manifold heat shield Right Exhaust Manifold
threaded spacers.

Figure 285 Right exhaust manifold heat shield

Figure 284 Left exhaust manifold
1. M8 x 12 bolt (3)
1. M8 x 40 stud bolt (4) 2. M8 nut
2. M8 x 40 bolt (4) 3. Heat shield
3. Left exhaust manifold

1. Remove and discard three M8 x 12 heat shield

4. Remove and discard four M8 x 40 exhaust bolts and M8 heat shield nut.
manifold bolts and four M8 x 40 exhaust manifold
2. Remove right exhaust manifold heat shield.
stud bolts.
5. Remove left exhaust manifold and discard gasket.

Figure 286 Right exhaust manifold heat shield

spacers

3. Remove three right exhaust manifold heat shield

threaded spacers.
 INTAKE AND EXHAUST MANIFOLDS 177

Figure 287 Right exhaust manifold Figure 288 Intake manifold bolts
1. M8 x 40 bolt (4) 1. M6 x 47 stud bolt
2. M8 x 40 stud bolt (4) 2. M6 x 87 stud bolt (6)
3. Right exhaust manifold 3. M6 x 70 bolt (3)
4. M6 x 87 bolt
5. Intake manifold
4. Remove and discard four M8 x 40 exhaust 6. M6 x 95 stud bolt
manifold bolts and four M8 x 40 exhaust manifold 7. M6 x 95 bolt (4)
stud bolts.
5. Remove right exhaust manifold and discard
1. Remove eight intake manifold stud bolts and eight
gasket.
intake manifold bolts.
2. Remove Exhaust Gas Recirculation (EGR) cooler
Intake Manifold lower bracket.
3. Remove intake manifold by lifting straight up.
WARNING: To prevent personal injury or Discard gaskets.
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi). 4. Place Intake Port Covers (page 184) over cylinder
head intake ports.
CAUTION: To prevent engine damage, cover the
exposed portion of the engine and blow out or vacuum
dirt and debris under the intake manifold. This
prevents dirt and debris from entering the intake ports
when the manifold is removed.
178 INTAKE AND EXHAUST MANIFOLDS

Cleaning, Inspection, and Testing Manifold Warp Test for Exhaust Manifolds
Intake and Exhaust Manifolds 1. Use a straightedge and feeler gauge to check
seating surface flatness for right and left exhaust
Intake and exhaust manifolds are one piece
manifolds.
castings and may be cleaned with steam or suitable
non-caustic solvents. 2. Check for flatness – across left and right and
diagonally. See specifications (page 184).
3. If specifications are not met, do not resurface
exhaust manifold, replace exhaust manifold.
 INTAKE AND EXHAUST MANIFOLDS 179

Installation 4. Install Exhaust Gas Recirculation (EGR) cooler

lower bracket.
Intake Manifold

Figure 290 Intake manifold bolts

Figure 289 Intake manifold gasket with
centering tab 1. M6 x 47 stud bolt
2. M6 x 87 stud bolt (6)
3. M6 x 70 bolt (3)
1. Position a new intake manifold gasket on each 4. M6 x 87 bolt
side of intake manifold and install two bolts 5. Intake manifold
through each side to hold gaskets. Make sure 6. M6 x 95 stud bolt
centering tabs are facing up in the manifold, while 7. M6 x 95 bolt (4)
positioned inboard toward engine valley.
2. Remove Intake Port Covers (page 184) from
5. Loosely install eight intake manifold stud bolts and
cylinder head intake ports.
eight intake manifold bolts.
3. Position intake manifold on cylinder heads.
180 INTAKE AND EXHAUST MANIFOLDS

Figure 291 Torque sequence for intake manifold mounting bolts

6. Tighten intake manifold bolts and intake manifold NOTE: Do not apply anti-seize compound to
stud bolts to special torque (page 184), following threads.
sequence (Figure 291).

Exhaust Manifolds
CAUTION: To prevent engine damage, hand
torque all nuts and bolts of the exhaust manifolds.
The exhaust manifold hardware has a special
high-temperature coating which will be damaged by
air tools.
CAUTION: To prevent engine damage, do not reuse
exhaust manifold bolts or stud bolts.
 INTAKE AND EXHAUST MANIFOLDS 181

Right Exhaust Manifold CAUTION: To prevent engine damage, align exhaust

manifold gasket with exhaust manifold before
tightening bolts and stud bolts to the specified torque
value.
NOTE: Tighten bolts and stud bolts to special
torque, then retighten using same sequence to
seat manifold.
2. Install four new M8 x 40 exhaust manifold bolts
and four new M8 x 40 exhaust manifold stud
bolts. Tighten bolts and stud bolts to special
torque (page 184) following sequence (Figure
293). Retighten bolts and stud bolts to special
torque (page 184) using same sequence (Figure
293).

Figure 292 Right exhaust manifold

1. M8 x 40 bolt (4)
2. M8 x 40 stud bolt (4)
3. Right exhaust manifold

1. Position a new gasket and install right exhaust

manifold.

Figure 294 Right exhaust manifold heat shield

spacers

3. Install three right exhaust manifold heat shield

threaded spacers. Tighten spacers to special
torque (page 184).

Figure 293 Torque sequence for right exhaust

manifold mounting bolts
182 INTAKE AND EXHAUST MANIFOLDS

1. Position a new gasket and install left exhaust

manifold.

Figure 295 Right exhaust manifold heat shield

1. M8 x 12 bolt (3)
2. M8 nut
3. Heat shield

4. Install right exhaust manifold heat shield. Figure 297 Torque sequence for left exhaust
manifold mounting bolts
5. Install three new M8 x 12 heat shield bolts and a
new M8 heat shield nut. Tighten bolts and nut to
special torque (page 184). CAUTION: To prevent engine damage, align exhaust
manifold gasket with exhaust manifold before
tightening bolts and stud bolts to the specified torque
Left Exhaust Manifold value.
NOTE: Tighten bolts to special torque, then
retighten using same sequence to seat manifold.
2. Install four new M8 x 40 exhaust manifold bolts
and four new M8 x 40 exhaust manifold stud
bolts. Tighten bolts and stud bolts to special
torque (page 184) following sequence (Figure
297). Retighten bolts and stud bolts to special
torque (page 184) using same sequence (Figure
297).

Figure 296 Left exhaust manifold

1. M8 x 40 stud bolt (4)
2. M8 x 40 bolt (4)
3. Left exhaust manifold
 INTAKE AND EXHAUST MANIFOLDS 183

Figure 298 Left exhaust manifold heat shield Figure 299 Left exhaust manifold heat shield
spacers
1. M8 nut
2. M8 x 12 bolt (3)
3. Heat shield
3. Install three left exhaust manifold heat shield
threaded spacers. Tighten spacers to special
torque (page 184).
4. Install left exhaust manifold heat shield.
5. Install three new M8 x 12 heat shield bolts and a
new M8 heat shield nut. Tighten bolts and nut to
special torque (page 184).
184 INTAKE AND EXHAUST MANIFOLDS

Specifications
Table 16 Intake, Inlet, and Exhaust Manifolds
Exhaust Manifold
Maximum allowable warpage 0.08 mm (0.003 in)

Special Torque

Table 17 Intake, Inlet, and Exhaust Manifolds

Intake manifold bolts and stud bolts (use special
11 N·m (100 lbf·in)
torque sequence)
Exhaust manifold heat shield nuts, bolts, and spacers 30 N·m (22 lbf·ft)
Exhaust manifold bolts and stud bolts (use special
30 N·m (22 lbf·ft)
torque sequence)

Special Service Tools

Table 18 Intake, Inlet, and Exhaust Manifolds
Description Tool Number
Feeler Gauge Obtain locally
Straightedge Obtain locally
Intake Port Covers (cylinder heads) ZTSE4559
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 185

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195
Alternator and Freon® Mounting Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195
Front Engine Mount Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196
Thermostat Assemblies and Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .196
Fan Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
Water Pump Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
Vibration Damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198
Front Oil Seal and Wear Sleeve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199
Front Crankcase Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200
Oil Pump Housing Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .201

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202

Vibration Damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202
Oil Gerotor Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202
Front Crankcase Cover and Water Pump Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203
Thermostat Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
Oil Pump Housing Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
Front Crankcase Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205
Front Oil Seal and Wear Sleeve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206
Vibration Damper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207
Water Pump Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208
Fan Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
Thermostat Assemblies and Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209
Front Engine Mount Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210
Alternator and Freon® Mounting Bracket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213

186 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 187

Exploded Views

Figure 300 ® mounting bracket

Alternator and Freon®
1. Alternator and Freon® mounting 2. M10 x 45 cap screw (4) 4. M10 x 80 bolt
bracket 3. Belt tensioner
188 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Figure 301 Front engine mount bracket

1. Front engine mount bracket 3. M8 x 90 bolt (2 if equipped) 5. M12 x 70 bolt (3 if equipped with
2. Auxiliary accessory mounting 4. M12 x 110 bolt (if equipped) auxiliary accessory mounting
bracket (if equipped) bracket, 4 without)
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 189

Figure 302 Thermostat assemblies and housing

1. Thermostat assembly without 3. M6 x 20 bolt (3) 5. Thermostat assembly with
bypass 4. M6 x 25 stud bolt bypass
2. Thermostat housing 6. Thermostat cover gasket
190 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Figure 303 Fan drive

1. Fan and pulley mounting hub 3. Fan pulley
2. M8 x 65 bolt (4) 4. M8 x 20 bolt (6)
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 191

Figure 304 Water pump assembly

1. Water pump assembly gasket 3. M8 x 35 bolt (5) 5. M8 x 16 bolt (4)
2. Water pump assembly 4. Water pump pulley
192 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Figure 305 Vibration damper

1. Vibration damper 3. Front Power Takeoff (PTO) 4. M10 x 30 bolt (3, if equipped
2. M12 x 59 bolt (4) pulley (if equipped) with front PTO pulley)
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 193

Figure 306 Front crankcase cover

1. Front cover gasket 3. M8 x 75 bolt (7) 5. Front cover oil seal
2. Front crankcase cover 4. M8 x 45 bolt (10)
194 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Figure 307 Oil pump assembly

1. Outer oil pump gerotor 3. Oil pump housing gasket 5. Oil pump housing assembly
2. Inner oil pump gerotor 4. Front crankcase cover 6. M8 x 25 bolt (4)
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 195

Removal ® Mounting Bracket

Alternator and Freon®

GOVERNMENT REGULATION: Engine

fluids (oil, fuel, and coolant) may be a hazard
to human health and the environment.
Handle all fluids and other contaminated
materials (e.g. filters, rags) in accordance
with applicable regulations. Recycle
or dispose of engine fluids, filters, and
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the "Safety
Information" section of this manual. Figure 308 Belt tensioner
1. M10 x 80 bolt
WARNING: To prevent personal injury or 2. Belt tensioner
death, shift transmission to park or neutral, set
parking brake, and block wheels before doing
diagnostic or service procedures. CAUTION: To prevent engine damage, do not twist
the belt tensioner; damage to the locating pin may
WARNING: To prevent personal injury or occur, resulting in improper alignment of the belt
death, wear safety glasses with side shields. tensioner.
Limit compressed air pressure to 207 kPa (30 psi). 1. Remove M10 x 80 bolt and belt tensioner.

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.
NOTE: See the following service sections for
information on removal of components prior to
this section.
• Engine Electrical
• Exhaust Gas Recirculation (EGR) System
• Air Compressor and Power Steering/Fuel Pump
• Fuel System
Figure 309 ® mounting
Alternator and Freon®
bracket
1. M10 x 45 cap screw (4)
2. Alternator and Freon® mounting bracket
196 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

2. Remove four M10 x 45 cap screws and alternator

and Freon® mounting bracket.

Front Engine Mount Bracket

NOTE: For engines that are not equipped with
auxiliary accessory mounting bracket, the front
engine mount bracket is secured by four M12 x 70
bolts.

Figure 311 Front engine mount bracket

1. M12 x 70 bolt (3)
2. Front engine mount bracket

4. Remove three M12 x 70 bolts and front engine

mount bracket.

Thermostat Assemblies and Housing

Figure 310 Auxiliary accessory mounting
bracket (if equipped)
1. M8 x 90 bolt (2)
2. M12 x 110 bolt
3. Auxiliary accessory mounting bracket (if equipped)

1. Remove M8 x 90 bolts.
2. Remove M12 x 110 bolt.
3. Remove auxiliary accessory mounting bracket.

Figure 312 Thermostat housing

1. M6 x 25 stud bolt
2. M6 x 20 bolt (3)
3. Thermostat housing

1. Remove M6 x 25 stud bolt and three M6 x 20 bolts.

2. Remove thermostat housing from front crankcase
cover and discard gasket.
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 197

NOTE: The thermostat assembly with bypass is

the lower thermostat, and has a valve to seal
against the orifice in the front crankcase cover.
3. Remove two thermostat assemblies from
thermostat housing.

Fan Drive

Figure 314 Fan and pulley mounting hub

1. M8 x 65 bolt (4)
2. Fan and pulley mounting hub

2. Remove four M8 x 65 bolts and fan and pulley

mounting hub.

Figure 313 Fan pulley Water Pump Assembly

1. M8 x 20 bolt (6)
2. Fan pulley

NOTE: If not using an impact wrench, use a

holding device to lock fan pulley when removing
bolts.
1. Remove six M8 x 20 bolts and fan pulley.

Figure 315 Water pump pulley

1. M8 x 16 bolt (4)
2. Water pump pulley

NOTE: If not using an impact wrench, use a

holding device to lock water pump pulley when
removing bolts.
1. Remove four M8 x 16 bolts and water pump pulley.
198 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

1. Remove three M10 x 30 bolts and front PTO pulley

(if equipped).

Figure 316 Water pump assembly

1. M8 x 35 bolt (5)
2. Water pump assembly
Figure 318 Vibration damper runout
1. Vibration damper
2. Remove five M8 x 35 bolts. 2. Dial indicator
CAUTION: To prevent engine damage, do not drop
water pump impeller or hit impeller with hard objects.
NOTE: When prying crankshaft forward, use a
3. Remove water pump assembly and discard block of wood between the pry bar and front
gasket. crankcase cover.
2. Before removing vibration damper, inspect
vibration damper for runout as follows:
Vibration Damper
a. Attach dial indicator with magnetic base (page
213) to front of crankcase. Position indicator
point on vibration damper front surface.
NOTE: Pry only in one direction to
eliminate possible error induced by
crankshaft end play.
b. Pry crankshaft forward and zero dial indicator.
This becomes the baseline.
c. Turn crankshaft 90°. Pry crankshaft forward
and record reading.
d. Repeat at each surface every 90°. If runout
exceeds specification (page 212), replace
vibration damper.

Figure 317 Front Power Takeoff (PTO) pulley (if

equipped)
1. M10 x 30 bolt (3)
2. Front PTO pulley
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 199

Figure 319 Vibration damper Figure 320 Front oil seal removal
1. M12 x 59 bolt (4)
2. Vibration damper 2. Thread a slide hammer (page 213) with correct
size screw in one of the two holes.
3. Slide hammer until one side of seal begins to pull
WARNING: To prevent personal injury out of oil pump housing assembly. Move slide
or death, support the vibration damper when hammer to other hole and repeat until front oil seal
removing bolts. The damper can easily slide off is removed completely.
the end of the crankshaft.
NOTE: The following steps are necessary if engine
NOTE: The vibration damper retaining bolts are has a front wear sleeve. Wear sleeves are only
not reusable. available in oil seal service kits.
3. Remove and discard four M12 x 59 bolts. 4. Complete following steps to install Front Wear
CAUTION: To prevent engine damage, do not Sleeve Remover (page 213):
immerse damper in petroleum based solvents. This
can damage the rubber damper element.
4. Remove vibration damper.

Front Oil Seal and Wear Sleeve

NOTE: The International® MaxxForce® 7 is not
equipped with a wear sleeve during factory
production. Wear sleeves are available with an oil
seal service kit.
NOTE: If removing only the seal, perform steps
1 through 3. Otherwise, remove seal and wear
sleeve using steps 1 through 4.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields when Figure 321 Removal of front wear sleeve
doing the following procedure.
1. With an awl and hammer, punch two holes 180° a. Install two half shell ridges of tool behind front
apart in front oil seal. wear sleeve.
200 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

b. Place threaded shaft and pulling flange inside

two shells while holding shells together.
c. Slide outer collar of tool around two half
shells.
d. Thread shaft up to crankshaft, and turn shaft
to remove wear sleeve.

Front Crankcase Cover

Figure 322 Front crankcase cover bolts

1. M8 x 75 bolt (7) 2. M8 x 45 bolt (10)

CAUTION: Do not remove four M8 x 25 oil pump

WARNING: To prevent personal injury or housing assembly bolts at this time. Damage to oil
death, use a suitable lifting device and get help pump may result.
when removing, lowering, and installing the front
cover. NOTE: Support front cover while removing bolts.
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 201

1. Remove seven M8 x 75 bolts and 10 M8 x 45 Oil Pump Housing Assembly

bolts.
CAUTION: To prevent engine damage, cut protruding
sealant from the joint of the crankcase and lower
crankcase before removing the front cover gasket. If
the sealant is not cut, the seal between the crankcase
and lower crankcase may fail. Complete engine
removal and disassembly is required to install a new
crankcase gasket.
2. Remove front crankcase cover and discard
gasket.

Figure 324 Oil pump housing assembly

1. M8 x 25 bolt (4)
2. Oil pump housing assembly

1. Remove four M8 x 25 bolts.

CAUTION: To prevent engine damage, use
permanent markers to identify internal components
or their orientation. Do not use paint or temporary
Figure 323 Sealant between crankcase and
markers.
lower crankcase joint
2. Remove oil pump housing assembly and discard
gasket.
3. Use a thin blade scraper to cut sealant where
3. Use a permanent marker to mark the front of each
crankcase and lower crankcase meet.
gerotor for correct reassembly orientation.
202 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Cleaning, Inspection, and Testing

Vibration Damper
CAUTION: To prevent engine damage, do not
immerse damper in petroleum based solvents. This
can damage the rubber damper element.
1. Clean vibration damper with soap, water, and a
soft parts brush.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Dry damper with filtered compressed air.
3. Inspect vibration damper rubber compound Figure 325 Outer oil pump gerotor inspection
for bulging (page 212). If bulging exceeds
specification, replace vibration damper.
4. Inspect vibration damper rubber compound for 7. Use a feeler gauge (page 213) to inspect for wear
cracks or separation. Replace vibration damper by checking radial clearance between outer oil
if necessary. pump gerotor and oil pump housing assembly.

Oil Gerotor Pump

1. Wash all parts thoroughly in a nonchlorinated
solvent.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Dry with filtered compressed air.
3. Lay oil pump housing assembly on workbench.
4. Inspect inner and outer oil pump gerotors and
oil pump housing assembly for nicks, burrs or
scoring.
Figure 326 End clearance check for oil pump
5. Replace any damaged components.
NOTE: The inner and outer oil pump gerotors
are a matched set and cannot be replaced 8. Check oil pump end clearance as follows:
individually. a. With inner and outer oil pump gerotors in
NOTE: If installing new inner and outer oil place in oil pump housing assembly, put
pump gerotors, correct orientation is not straightedge across housing assembly.
necessary. If installing old inner and outer b. Insert feeler gauge under straightedge at
oil pump gerotors, correct orientation is inner and outer oil pump gerotors. Compare
necessary. end clearance with specifications (page 212).
6. Place inner and outer oil pump gerotors in oil c. If measurements are not within specifications,
pump housing assembly. replace both inner and outer oil pump gerotors
as a set.
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 203

9. Remove oil pressure regulator. Thermostat Assembly

WARNING: To prevent personal injury

or death, wear heat protective gloves and
appropriate eye protection when checking
operation of thermostat.
CAUTION: To prevent engine damage, when testing
the thermostat, make sure the thermostat assembly
opens fully at the specified temperature.
Check operation of thermostat assemblies as follows:
1. Manually open thermostat enough to insert a
nylon ribbon under valve seat.

Figure 327 Oil pressure regulator components

1. Piston relief
2. Spring relief valve
3. Cap relief valve and seal relief valve retainer

10. Inspect oil pressure regulator components and

bore for wear. Replace if necessary.

Front Crankcase Cover and Water Pump

Assembly
1. Wash front crankcase cover and water pump Figure 328 Thermostat operation test
assembly thoroughly in a suitable cleaning
1. Suspension line
solvent.
2. Ribbon
3. Thermometer
WARNING: To prevent personal injury or 4. Thermostat assembly
death, wear safety glasses with side shields. 5. Heat source
Limit compressed air pressure to 207 kPa (30 psi).
2. Dry with filtered compressed air. 2. Suspend thermostat assembly in a container so
3. Inspect front crankcase cover for cracks. Replace thermostat assembly does not touch bottom of
if necessary. container.

4. Inspect water pump assembly for leaks, cracks, 3. Heat water filled container to approximate
bearing failure, and problems with bearings or start-to-open temperature of thermostat
shaft seal. Replace if necessary. assembly. See Specifications for temperature
(page 212).
4. Check thermometer and record temperature as
soon as thermostat assembly drops from nylon
ribbon. This is the start-to-open temperature.
5. Continue to heat water to full-open temperature
of the thermostat assembly. See Specifications
204 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

(page 212). Check for movement of thermostat 7. If thermostat assembly is damaged or operates
assembly valve. incorrectly, replace thermostat assembly.
6. While sleeve is off its seat, remove thermostat
assembly from container and inspect seat area for
pitting and foreign deposits.
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 205

Installation 3. Install four M8 x 25 bolts and tighten to special

torque (page 213).
Oil Pump Housing Assembly

Front Crankcase Cover

Figure 329 Oil pump housing assembly

1. M8 x 25 bolt (4)
Figure 330 Liquid gasket applications
2. Oil pump housing assembly

CAUTION: To prevent engine damage, install gasket

NOTE: If installing new inner and outer oil pump and cover within 5 minutes of Liquid Gasket (RTV)
gerotors, correct orientation is not necessary. If application to inhibit the formation of a skin and ensure
installing old inner and outer oil pump gerotors, a leak proof joint.
correct orientation is necessary.
1. Apply Liquid Gasket (RTV) (page 213) to joining
1. Install inner and outer oil pump gerotors. surfaces of upper crankcase and lower crankcase
assemblies.
2. Position a new gasket and install oil pump housing
assembly. 2. Position a new front cover gasket on crankcase.
206 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Figure 331 Front crankcase cover bolts

1. M8 x 75 bolt (7) 2. M8 x 45 bolt (10)

4. Install seven M8 x 75 bolts and 10 M8 x 45 bolts.

WARNING: To prevent personal injury or Tighten bolts to special torque (page 213).
death, use a suitable lifting device and get help
when removing, lowering, and installing the front
cover. Front Oil Seal and Wear Sleeve
NOTE: Install front crankcase cover with oil pump NOTE: The International® MaxxForce® 7 is not
assembly in place for proper gerotor alignment. equipped with a wear sleeve during factory
NOTE: It may be necessary to manually turn oil production. Wear sleeves are available with an oil
pump gerotors, so they index onto crankshaft seal service kit.
correctly. 1. Put a 360° bead of hydraulic sealant such as
NOTE: Support front crankcase cover while Loctite® 569 (page 213) or equivalent on leading
installing bolts. edge of crankshaft before wear sleeve installation.

3. Install front crankcase cover.

 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 207

WARNING: To prevent personal injury

or death, install four new bolts to secure the
vibration damper.
1. Align vibration damper with dowel pin on front of
crankshaft.
NOTE: Do not use anti-seize compounds, grease
or lubricants. Each has an adverse effect on
torque results.
2. Install four new M12 x 59 bolts to secure vibration
damper on crankshaft.

Figure 332 Front oil seal and wear sleeve

CAUTION: To prevent engine damage, do not

separate wear sleeve from new oil seal; this damages
seal.
2. Use Front Seal (wear sleeve) Installer (page 213),
to drive oil seal and wear sleeve assembly into oil
pump housing assembly.

Vibration Damper

Figure 334 Torque sequence for vibration

damper bolts

3. Vibration damper bolt torque sequence:

a. Tighten each bolt to special torque (page 213)
using above sequence.
b. Rotate each bolt an additional 90° using
above sequence.

Figure 333 Vibration damper

1. M12 x 59 bolt (4)
2. Vibration damper
208 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

CAUTION: To prevent engine damage, do not drop

water pump impeller or hit impeller with hard objects.
1. Position a new gasket and install water pump
assembly.
2. Install five M8 x 35 bolts and tighten to special
torque (page 213).

Figure 335 Front Power Takeoff (PTO) pulley (if

equipped)
1. M10 x 30 bolt (3)
2. Front PTO pulley

4. Install front PTO pulley (if equipped).

5. Install three M10 x 30 bolts and tighten to special Figure 337 Water pump pulley
torque (page 213).
1. M8 x 16 bolt (4)
2. Water pump pulley
Water Pump Assembly
3. Install water pump pulley.
NOTE: Use a holding device to lock water pump
pulley when installing bolts.
4. Install four M8 x 16 bolts and tighten to standard
torque (page 383).

Figure 336 Water pump assembly

1. M8 x 35 bolt (5)
2. Water pump assembly
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 209

Fan Drive 3. Install fan pulley.

NOTE: Use a holding device to lock fan pulley
when installing bolts.
4. Install six M8 x 20 bolts and tighten to special
torque (page 213).

Thermostat Assemblies and Housing

Figure 338 Fan and pulley mounting hub

1. M8 x 65 bolt (4)
2. Fan and pulley mounting hub

1. Install fan and pulley mounting hub.

2. Install four M8 x 65 bolts and tighten to special
torque (page 213). Figure 340 Thermostat housing
1. M6 x 25 stud bolt
2. M6 x 20 bolt (3)
3. Thermostat housing

NOTE: The thermostat assembly with bypass is

the lower thermostat, and has a valve to seal
against the orifice in the front crankcase cover.
1. Install two thermostat assemblies to thermostat
housing. Verify correct position.
2. Position a new gasket and install thermostat
housing.
3. Install M6 x 25 stud bolt and three M6 x 20 bolts.
Tighten to special torque (page 213).
Figure 339 Fan pulley
1. M8 x 20 bolt (6)
2. Fan pulley
210 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Front Engine Mount Bracket

Figure 342 Auxiliary accessory mounting

bracket (if equipped)
Figure 341 Front engine mount bracket
1. M8 x 90 bolt (2)
1. M12 x 70 bolt (3) 2. M12 x 110 bolt
2. Front engine mount bracket 3. Auxiliary accessory mounting bracket

1. Install front engine mount bracket. 3. Install auxiliary accessory mounting bracket.

NOTE: For engines that are not equipped with 4. Install M8 x 90 bolts and tighten to standard torque
auxiliary accessory mounting bracket, the front (page 383).
engine mount bracket is secured by four M12 x 70 5. Install M12 x 110 bolt (front engine mount bracket)
bolts. and tighten to special torque (page 213).
2. Install three M12 x 70 bolts and tighten to special
torque (page 213). ® Mounting Bracket
Alternator and Freon®

Figure 343 ® mounting

Alternator and Freon®
bracket
1. M10 x 45 cap screw (4)
2. Alternator and Freon® mounting bracket
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 211

1. Install alternator and Freon® mounting bracket.

2. Install four M10 x 45 cap screws and tighten to
special torque (page 213).

Figure 344 Belt tensioner

1. M10 x 80 bolt
2. Belt tensioner

3. Install belt tensioner.

4. Install M10 x 80 bolt and tighten to special torque
(page 213).
212 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS

Specifications
Table 19 Front Cover, Cooling System, and Related Components
Vibration Damper
Face runout (maximum) 0.635 mm (0.025 in)
Rubber bulging (maximum) 1.5 mm (0.060 in)
Lubricating Oil Pump
Type Gerotor
Drive Crankshaft
Location Oil pump housing assembly
Pressure Regulating Valve:
Engine oil pressure, low idle (min. @ 110 °C
69 kPa (10 psi)
(230 °F) oil temp.)
Engine oil pressure, high idle (min. @ 110 °C
276 kPa (40 psi)
(230 °F) oil temp.)
Oil pump discharge pressure (2,500 rpm) 483 to 621 kPa (70 to 90 psi)
End clearance (inner and outer oil pump gerotor to oil
0.025 to 0.095 mm (0.001 to 0.004 in)
pump housing assembly)
Radial clearance (between outer oil pump gerotor
0.15 to 0.28 mm (0.006 to 0.011 in)
and oil pump housing assembly)
Thermostat Assembly With Bypass
Type Balanced pressure, wax pellet
Minimum recommended coolant operating
71° C (160° F)
temperature
Start-to-open temperature, 0.20 mm (0.009 in) stroke 92 to 96° C (198 to 205° F)
Full-open temperature, 10 mm (0.394 in) stroke 106° C (222.8° F)
Thermostat Assembly Without Bypass
Type Balanced pressure, wax pellet
Minimum recommended coolant operating
71° C (160° F)
temperature
Start-to-open temperature, 0.20 mm (0.009 in) stroke 86.7 to 91° C (188 to 196° F)
Full-open temperature, 10 mm (0.394 in) stroke 104° C (219.1° F)
 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS 213

Special Torque
Table 20 Front Cover, Cooling System, and Related Components
Alternator and Freon® mounting bracket cap
72 N·m (53 lbf·ft)
screws
Belt tensioner bolt 61 N·m (45 lbf·ft)
Fan and pulley mounting hub bolts 31 N·m (23 lbf·ft)
Fan pulley bolts 31 N·m (23 lbf·ft)
Front crankcase cover bolts 31 N·m (23 lbf·ft)
Front engine mount bracket bolts 107 N·m (79 lbf·ft)
Oil pump housing assembly bolts 22 N·m (16 lbf·ft)
Front Power Takeoff (PTO) pulley bolts 61 N·m (45 lbf·ft)
Thermostat housing stud bolt and bolts 13 N·m (115 lbf·in)
Vibration damper bolts 68 N·m (50 lbf·ft) + 90° rotation
Water pump assembly bolts 31 N·m (23 lbf·ft)

Special Service Tools

Table 21 Front Cover, Cooling System, and Related Components
Description Tool Number
Dial indicator with magnetic base Obtain locally

Feeler gauge Obtain locally

Front Seal (wear sleeve) Installer ZTSE4691

Front Wear Sleeve Remover ZTSE4705

Liquid Gasket (RTV) (6 oz. tube) 1830858C1

Loctite® 569 hydraulic sealant or equivalent Obtain locally

Slide hammer Obtain locally

Straightedge Obtain locally

214 FRONT COVER, COOLING SYSTEM, AND RELATED COMPONENTS
 CYLINDER HEAD AND VALVE TRAIN 215

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .217

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221
Valve Covers and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221
Breather Assembly and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .221
Left Valve Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .224
Right Valve Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
Fuel Injector and Rail Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
Glow Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
Valve Cover Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
Rocker Arm Support, Push Rods, and Valve Bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .228
Cylinder Heads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .229
Roller Hydraulic Cam Followers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .230
Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231
Fuel Injector Sleeves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .231
Glow Plug Sleeves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232
Dual Fulcrum Plate Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .235

Cylinder Head and Crankcase Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .235
Cylinder Head Inspection – Valves Installed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .235
Cylinder Head Inspection – Valves Removed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238
Push Rods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239
Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239
Valve Springs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .240
Valve Stem Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241
Fuel Injector Sleeve Bore and Gallery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241
Glow Plug Sleeve Bore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241
Dual Rocker Fulcrums. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243
Dual Fulcrum Plate Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .243
Glow Plug Sleeves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244
Fuel Injector Sleeves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .244
Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Roller Hydraulic Cam Followers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .246
Cylinder Heads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .248
Rocker Arm Supports, Push Rods, and Valve Bridges. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
Valve Cover Base. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .252
Glow Plugs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
Fuel Injector and Rail Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .253
Valve Covers and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
Right Valve Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
Left Valve Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .256
Breather Assembly and Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .257
216 CYLINDER HEAD AND VALVE TRAIN

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .260

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .262

 CYLINDER HEAD AND VALVE TRAIN 217

Exploded Views

Figure 345 Valve cover and valve cover base assemblies (typical)
1. Valve cover base 5. Valve cover stud bolt assembly 9. Valve cover base gasket
2. M6 x 30 bolt (11) (left valve cover 6) (right valve
3. Valve cover cover 7)
4. Valve cover bolt assembly (left 6. Valve cover gasket
valve cover 4) (right valve cover 7. Fuel supply line seal
3) 8. Slotted spring dowel pin
218 CYLINDER HEAD AND VALVE TRAIN

Figure 346 Fuel injectors and glow plugs (typical)

1. Fuel injector assembly (4) 4. Fuel rail to injector tube 6. Glow plug (4)
2. Rail assembly assembly (4) 7. Glow plug sleeve (4)
3. M8 x 30 bolt (2) 5. Injector hold down clamp 8. Injector sleeve (4)
assembly (4)
 CYLINDER HEAD AND VALVE TRAIN 219

Figure 347 Rocker arm support components (typical)

1. Intake rocker arm assembly (4) 5. M10 x 70 bolt (8) 10. Flat countersunk screw (2) (left
2. Rocker arm clip (8) 6. Rocker arm support cylinder head)/ M10 x 25 bolt (2)
3. Dual rocker fulcrum plate (4) 7. Dowel sleeve bushing (2) (right cylinder head)
4. Exhaust rocker arm assembly 8. Valve bridge (8) 11. Push rod assembly (8)
(4) 9. Lifting eye 12. 3/8” pivot ball (8)
220 CYLINDER HEAD AND VALVE TRAIN

Figure 348 Cylinder head components (typical)

1. Valve seal assembly (16) 6. Valve spring (16) 11. Intake valve (8)
2. Valve spring retainer (16) 7. Cylinder head assembly 12. Roller hydraulic cam follower (8)
3. M8 x 70 bolt (5) 8. Cylinder head gasket 13. Roller follower guide (2)
4. Cylinder head bolt (10) 9. Spring dowel pin (2) 14. Lifter guide bolt with washer
5. Valve stem key (32) 10. Exhaust valve (8) assembly (2)
 CYLINDER HEAD AND VALVE TRAIN 221

Removal NOTE: See the following service sections for

information on removal of components prior to this
section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Air Compressor and Power Steering/Fuel Pump
with applicable regulations. Recycle
or dispose of engine fluids, filters, and • Fuel System
other contaminated materials according to • Intake and Exhaust Manifolds
applicable regulations.
Valve Covers and Related Components
Breather Assembly and Components
WARNING: To prevent personal injury or
death, read all safety instructions in the "Safety
Information" section of this manual.

WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing
diagnostic or service procedures.

WARNING: To prevent personal injury or

death, disconnect the main battery negative
terminal before disconnecting or connecting
electrical components.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields. Figure 349 Breather inlet hose
Limit compressed air pressure to 207 kPa (30 psi).
1. Breather inlet hose
2. Clamp (2)
WARNING: To prevent personal injury or
death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash 1. Release two clamps and remove breather inlet
with soap and water. Wash or discard clothing hose.
and rags contaminated with engine fluids.

WARNING: To prevent personal injury or

death, do not smoke and keep fuel away from
flames and sparks.
222 CYLINDER HEAD AND VALVE TRAIN

4. Remove M6 nut.
5. Remove EBP tube assembly.

Figure 350 Breather assembly

1. M8 x 35 bolt (2)
2. Breather assembly
3. 1/2” preload clamp Figure 352 Breather inlet adapter
4. Breather oil drain assembly

6. Remove breather inlet adapter.

2. Remove two M8 x 35 bolts.
3. Release clamp and remove breather assembly.

Figure 353 Breather inlet adapter O-ring seal

Figure 351 Exhaust Back Pressure (EBP) tube

7. Remove and discard O-ring seal.
assembly
1. M6 nut
2. EBP tube assembly
 CYLINDER HEAD AND VALVE TRAIN 223

Figure 354 Breather support Figure 356 Breather oil drain assembly
components
1. M6 nut (4)
2. Breather support 1. 1/2” preload clamp
2. Nylon tube assembly
3. 3/8” preload clamp (3)
8. Remove four M6 breather support nuts. 4. Check valve assembly
5. Steel tube
9. Remove breather support.

12. Release and position aside three 3/8” preload

clamps.
13. Disconnect and remove nylon tube, steel tube,
and check valve.

Figure 355 Breather oil drain assembly

1. M6 nut
2. Breather oil drain assembly
3. 3/8” preload clamp

Figure 357 Breather oil drain assembly to

10. Remove M6 breather oil drain assembly nut. crankcase M12 fitting
11. Release clamp and remove breather oil drain
assembly. 14. Remove M12 fitting.
224 CYLINDER HEAD AND VALVE TRAIN

Figure 358 M12 fitting O-ring seal Figure 360 Oil fill extension O-ring seal

15. Remove and discard O-ring seal. 2. Remove and discard oil fill extension O-ring seal.

Left Valve Cover

Figure 361 Left valve cover bolt and stud bolt

assemblies

Figure 359 Oil fill extension 1. Valve cover bolt assembly (4)
2. Valve cover stud bolt assembly (6)

1. Remove oil fill extension.

CAUTION: To prevent engine damage, do not use air
tools to remove or install valve covers.
3. Remove four valve cover bolt assemblies and six
valve cover stud bolt assemblies.
4. Remove left valve cover.
5. Remove and discard left valve cover gasket.
 CYLINDER HEAD AND VALVE TRAIN 225

Right Valve Cover

Figure 363 Fuel rail to injector tube assemblies

(typical)
Figure 362 Right valve cover bolt and stud bolt
1. Fuel rail to injector tube assembly (4)
assemblies
2. Tube nut (8)
1. Valve cover bolt assembly (3)
2. Valve cover stud bolt assembly (7)

WARNING: To prevent personal injury or

CAUTION: To prevent engine damage, do not use air death, whenever any fuel line (tubing) in the
tools to remove or install valve covers. high-pressure fuel system is removed, it must be
replaced with new.
1. Remove three valve cover bolt assemblies and
seven valve cover stud bolt assemblies. 2. Use a wrench to hold fuel injector fittings and
loosen four tube nuts from fuel injectors.
2. Remove right valve cover.
3. Loosen four tube nuts on fuel rail. Remove and
3. Remove and discard right valve cover gasket.
discard four fuel rail to injector tube assemblies.
4. Cover fuel rail inlet and outlet ports with Fuel
Fuel Injector and Rail Assemblies System Caps (page 262).
1. Remove Under Valve Cover (UVC) harness (page 5. Cover fuel injector ports with Fuel System Caps
64). (page 262).
226 CYLINDER HEAD AND VALVE TRAIN

8. Remove fuel supply line seal by pressing it with a

proper size socket toward the inside of the valve
cover base. Discard fuel supply line seal.

Figure 364 Rail assembly (typical)

1. Rail assembly
2. M8 x 30 bolt (2)

Figure 366 Fuel injector assembly (typical)

6. Remove two M8 x 30 bolts. 1. Fuel injector assembly (4)
2. Injector clamp bolt (4)
7. Remove rail assembly.
3. Injector hold down clamp (4)

CAUTION: To prevent engine damage, remove

injectors before removing cylinder head.
CAUTION: To prevent engine damage, do not use
power tools.
9. Loosen injector clamp bolt to extract fuel injector
assembly from cylinder head.
10. Remove fuel injector assembly from cylinder head
by lifting fuel injector assembly and injector hold
down clamp assembly straight up and out.

Figure 365 Fuel supply line seal removal

(typical)
1. Fuel supply line seal
2. Valve cover base
 CYLINDER HEAD AND VALVE TRAIN 227

Glow Plugs

Figure 367 Fuel injector seal and combustion

gasket (typical)
Figure 368 Glow plugs (typical)
1. Fuel injector seal
2. Combustion gasket

Remove four glow plugs.

CAUTION: To prevent engine damage, install new
fuel injector seal and combustion gasket if a fuel
Valve Cover Base
injector is removed.
NOTE: Observe combustion gasket orientation at
removal and be sure to install the new combustion
gasket with the same orientation. If the combustion
gasket remains stuck inside the fuel injector sleeve,
remove it carefully so the original orientation can be
noted. As a reference in establishing its orientation,
the combustion gasket has a groove on one side and
a rolled edge on the opposite side.
11. Using a small hand tool, remove and discard
combustion gasket. Wipe injector nozzle with a
lint free cloth.
CAUTION: To prevent engine damage, do not clean
fuel injectors with solvents or brake cleaner.
12. Clean injector tip with Fuel Injector Tip Cleaning
Brush (page 262). Figure 369 Valve cover base assembly (typical)

13. Remove and discard old fuel injector seal. 1. M6 x 30 bolt (11)
2. Valve cover base assembly
14. Insert fuel injector assembly in Injector Cup (page
262), and place in Fuel Injector Rack Holder (page
262). 1. Remove 11 M6 x 30 bolts.
2. Remove valve cover base assembly.
228 CYLINDER HEAD AND VALVE TRAIN

1. Mark dual rocker fulcrum plates so they can be

installed in their original location.
2. Remove eight M10 x 70 bolts and four dual
fulcrum plate assemblies.

Figure 370 Valve cover base gasket (typical)

3. Remove and discard valve cover base gasket.

Figure 372 Push rod assemblies and rocker arm

Rocker Arm Support, Push Rods, and Valve
support (typical)
Bridges
1. Push rod assembly (8)
2. Rocker arm support

3. Remove rocker arm support.

CAUTION: To prevent engine damage, use
permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.
CAUTION: To prevent engine damage, keep cam
followers and push rods in the order removed and
install in original order.
4. Remove and identify each push rod so they can
be installed in their original locations.

Figure 371 Dual rocker fulcrum plates (typical) Example: 2 - I

1. M10 x 70 bolt (8) • Cylinder number 2 as counted from the front

2. Dual fulcrum plate assembly (4) of engine
• I = Intake, E = Exhaust

CAUTION: To prevent engine damage, use

permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.
 CYLINDER HEAD AND VALVE TRAIN 229

NOTE: The lifting bracket allows each cylinder head

to be removed squarely from the crankcase.
1. Position Cylinder Head Lifting Bracket (page 262)
on cylinder head over the center two cylinders,
install and tighten four lifting bracket mounting
bolts.
2. Attach a lifting hoist hook or suitable lifting sling to
lifting bracket.

Figure 373 Valve bridge (typical)

NOTE: Identify each valve bridge and corresponding

valve set so they can be installed in their original
locations.
5. Remove eight valve bridges.

Cylinder Heads
Figure 375 Cylinder head bolts (typical)
1. M8 x 70 bolt (5)
WARNING: To prevent personal injury or
2. Cylinder head bolt (10)
death, mount cylinder head lifting bracket on
center of cylinder head. Also, make sure the
lifting hook has a safety latch.
3. Using a circular pattern loosen, remove, and
discard ten cylinder head bolts. Begin with the
outer bolts and move inward.
4. Remove five M8 x 70 bolts.
5. Lift cylinder head from crankcase.
CAUTION: To prevent engine damage, do not scratch
gasket surface of cylinder head.
6. Place cylinder head on a protected surface.
7. Remove and discard cylinder head gasket.

Figure 374 Cylinder Head Lifting Bracket

1. Cylinder Head Lifting Bracket
2. Lifting bracket mounting bolt (4)
230 CYLINDER HEAD AND VALVE TRAIN

CAUTION: To prevent engine damage, use

permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.
CAUTION: To prevent engine damage, keep cam
followers and push rods in the order removed and
install in original order.
NOTE: To remove the cam followers lift the guide
straight up. A hand tool may be required.
NOTE: Identify orientation of each cam follower and
guide during disassembly.
1. Remove two lifter guide bolt with washer
assemblies and two cam follower and guide
Figure 376 Cylinder head spring dowel pins in assemblies.
crankcase (typical)

8. Remove two spring dowel pins.

9. For left cylinder head, remove two flat
countersunk screws and lifting eye.
10. For right cylinder head, remove two M10 x 25 bolts
and lifting eye.

Roller Hydraulic Cam Followers

NOTE: If the valve train operates quietly and hydraulic
cam followers function properly, do not service cam
followers.

Figure 378 Roller hydraulic cam followers

(typical)
1. Roller hydraulic cam follower (4)
2. Roller follower guide

NOTE: Identify and note the position of each roller

hydraulic cam follower based on the orientation of its
lubrication hole. The roller hydraulic cam followers
must be installed in their original position.
2. Remove four roller hydraulic cam followers from
roller follower guide.

Figure 377 Cam follower and guide assemblies

(typical)
1. Lifter guide bolt with washer assembly (2)
2. Cam follower and guide assembly (2)
 CYLINDER HEAD AND VALVE TRAIN 231

Valves NOTE: Valve seal assemblies are not reusable. Use

pliers to remove valve seal assembly from end of valve
stem guide.
4. Remove and discard valve seal assembly.

Fuel Injector Sleeves

CAUTION: To prevent engine damage, if replacing
fuel injector sleeves in chassis, install a small plug
in the bottom of the injector sleeve before cutting
threads. This will keep small metal chips out of the
combustion chamber.
NOTE: Fuel injector sleeve removal is not required
unless sleeve is damaged.
NOTE: Use Injector Sleeve Remover (page 262) to
Figure 379 Valve spring compression (typical) remove injector sleeves.

1. Valve stem key (2)

2. C Type Valve Spring Compressor
3. Valve spring retainer
4. Valve

NOTE: A small magnet is useful to remove the valve

stem keys.
1. Compress valve springs with C Type Valve Spring
Compressor (page 262), and remove two valve
stem keys.
2. Release valve spring compressor and remove
valve spring retainer and valve spring.
3. Remove valve from cylinder head.
Figure 381 Injector Sleeve Remover
1. Thread tap
2. Injector sleeve remover
3. Thread tap guide collar

NOTE: The fuel injector sleeve is made of stainless

steel. Lubrication of the thread tap is required.
1. Lubricate thread tap.

Figure 380 Valve seal assembly (typical)

232 CYLINDER HEAD AND VALVE TRAIN

4. Install and tighten injector sleeve remover in fuel

injector sleeve.
5. Thread Slide Hammer (page 262) in injector
sleeve remover.
6. Remove and discard fuel injector sleeve.

Glow Plug Sleeves

CAUTION: To prevent engine damage, if replacing
glow plug sleeves in chassis, put a small plug in the
bottom of the glow plug sleeve before cutting threads.
The plug will prevent small metal chips from entering
the combustion chamber.

Figure 382 Thread tap guide collar installed NOTE: Glow plug sleeve removal is not required
(typical) unless sleeves are damaged.

1. Thread tap guide collar NOTE: Use Glow Plug Sleeve Remover (page 262) to
2. Thread tap remove glow plug sleeves.

2. Insert thread tap into fuel injector sleeve and

install thread tap guide collar on thread tap.
3. Cut at least 19 mm (0.75 in) deep threads to
accommodate injector sleeve remover.

Figure 384 Glow Plug Sleeve Remover

1. Thread tap
2. Glow plug sleeve remover

NOTE: The glow plug sleeve is made of stainless

steel. Lubrication of the thread tap is required.
Figure 383 Injector sleeve remover installed
(typical) 1. Lubricate thread tap.
1. Slide hammer
2. Injector sleeve remover
 CYLINDER HEAD AND VALVE TRAIN 233

4. Thread Glow Plug Sleeve Remover into glow plug

sleeve and tighten bolt until sleeve is extracted.
5. Remove and discard glow plug sleeve.

Dual Fulcrum Plate Assemblies

Figure 385 Glow plug sleeve tap (typical)

2. Insert thread tap into glow plug sleeve.

3. Cut at least 19 mm (0.75 in) deep threads to
accommodate glow plug sleeve remover.

Figure 387 Separation of rocker arm assembly

from dual rocker fulcrum plate (typical)
1. Rocker arm assembly
2. Dual rocker fulcrum plate
3. Rocker arm clip

1. Place dual fulcrum plate assembly upside down in

your palm.
2. Push up on rocker arm assembly with palm and
forward on dual rocker fulcrum plate with thumb
of opposite hand.

Figure 386 Glow Plug Sleeve Remover installed

234 CYLINDER HEAD AND VALVE TRAIN

Figure 388 Rocker arm assembly separated Figure 389 Rocker arm clip removed (typical)
(typical)
1. Dual rocker fulcrum plate
1. 3/8” pivot ball 2. Rocker arm clip
2. Rocker arm assembly
3. Rocker arm clip
4. Dual rocker fulcrum plate 4. Remove and discard rocker arm clip.

3. Remove rocker arm assembly and 3/8” pivot ball.

 CYLINDER HEAD AND VALVE TRAIN 235

Cleaning, Inspection, and Testing 6. Use Cylinder Head Bolt Tap (page 262) to clean
each tapped hole in crankcase top deck. Remove
Cylinder Head and Crankcase Components
debris with filtered compressed air.
7. Thoroughly clean push rods with a suitable
WARNING: To prevent personal injury or
solvent. Dry with filtered compressed air.
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
CAUTION: To prevent engine damage, do not scratch Cylinder Head Inspection – Valves Installed
gasket surface of cylinder head.
NOTE: Inspect cylinder head for thickness, warping,
1. With valves installed to protect seats, use a cracks, and valve leakage.
scraper and wire brush to remove deposits and
gasket material from valve heads and gasket
surface.
2. Use a suitable solvent to remove dirt, grease, and
deposits from removed parts.
3. Clean all bolt holes. Make sure gasket surfaces,
oil return, and coolant passages are clean. After
rinsing thoroughly with hot water, dry with filtered
compressed air.
4. Clean all bolts (except head bolts) with a
nonchlorinated solvent and dry thoroughly. New
head bolts must be installed.
CAUTION: To prevent engine damage, clean and
dry threads in crankcase bolt holes with filtered
compressed air. Dirt or oil in holes may cause binding Figure 391 Measurement of cylinder head
and incorrect torque readings. thickness
5. Clean crankcase threads with compressed air.

1. To determine if cylinder head has been resurfaced

previously, use a 3-4 inch micrometer to measure
deck thickness of cylinder head at four corner
locations. If overall cylinder head thickness
(deck-to-deck) specification (page 260) is not
met, install new cylinder head.

Figure 390 Cylinder Head Bolt Tap

236 CYLINDER HEAD AND VALVE TRAIN

the straight edge (page 262) on top of the feeler

gauge at 90° across the width of the cylinder head.
• If the feeler gauge blade can not be pulled
out from under the straight edge, that check
point passes the flatness check. Continue
inspection of remaining check points. If all
check points pass, continue with step 3.
• If the feeler gauge blade pulls out easily or is
loose, the cylinder head is out of flat. Install a
new cylinder head.

Figure 392 Points to check for cylinder head

flatness

Figure 394 Checking valve head recession

1. Straightedge
2. Feeler gauge
3. Valve head

Figure 393 Check point inspection

1. Straightedge 3. Before removing valves, check valve head
2. Feeler gauge recession (relative to deck) as follows:
a. Place a straightedge across each valve.

CAUTION: To prevent engine damage, do not b. Place a feeler gauge between straightedge
machine the cylinder head if it is out of flatness. and valve head.

NOTE: Use a straight edge that is calibrated by c. If out of specification (page 260), replace
the manufacturer to be flat within 0.0002 inches valve. Repeat step 2 with new valve, and
(0.005 mm) per running foot length. Do not place if specifications are still not met, replace
straightedge over and past the lifter opening area of cylinder head.
the cylinder head, when inspecting check points for 4. Use the Dye Penetrant Kit PT-7191 (page 262), to
cylinder head flatness. inspect for cracks in cylinder head
2. Put the 0.051 mm (0.002 inch) blade of the feeler
gauge (page 262) on the check point, and place
 CYLINDER HEAD AND VALVE TRAIN 237

Figure 395 Cleaner sprayed on cylinder head Figure 397 Spraying developer onto cylinder
(typical) head (typical)

5. Spray cleaner on lower deck (gasket surface) of

cylinder head and wipe dry.

Figure 398 Cylinder head crack between intake

Figure 396 Dye penetrant sprayed on cylinder
and exhaust valves (typical)
head (typical)

8. Spray developer on lower deck (gasket surface)

6. Spray dye penetrant on lower deck (gasket
of cylinder head and let dry for 5 to 15 minutes.
surface) of cylinder head and let dry for 5 to 15
Cracks show up as purple lines against white
minutes.
developer.
7. Wipe dye off cylinder head surface.
CAUTION: To prevent engine damage, install a new
NOTE: Dye will remain in cracks. cylinder head if cylinder head is cracked.
9. Position cylinder head on wooden blocks with
gasket surface facing down and spray mineral
spirits into intake and exhaust ports.
238 CYLINDER HEAD AND VALVE TRAIN

Figure 399 Leak inspection Figure 400 Cylinder Head Pressure Test Plate
1. Inspection mirror 1. Pressure test regulator and gauge assembly
2. Reflection of valve 2. Mounting bolts (15)
3. Flashlight 3. Cylinder Head Pressure Test Plate

10. Wait five minutes. Use an inspection mirror to 2. Fasten Cylinder Head Pressure Test Plate (page
inspect valve seat area for leakage of mineral 262) with rubber gasket attached to gasket side of
spirits. cylinder head. Secure plate with ten M14 and five
M8 mounting bolts.
NOTE: Valve seats must not leak. Valve replacement
is not required if the cylinder head passes the mineral 3. Install pressure test regulator and gauge
spirits test. If valve seats leak, install new valves. See assembly to Cylinder Head Pressure Test Plate
Valves (page 231). (page 262).
Cylinder Head Inspection – Valves Removed 4. Immerse cylinder head in water. Apply air
pressure and adjust to 124 to 138 kPa (18 to 20
psi) and inspect for leaks in the following places.
WARNING: To prevent personal injury or
death, wear safety glasses with side shields. • Ports
Limit compressed air pressure to 207 kPa (30 psi).
• Upper cylinder head deck
1. Pressure testing the cylinder head reveals cracks
• Lower cylinder head deck
in ports or sleeve leakage which cannot be seen
using dye penetrant. Pressure test the cylinder • Nozzle sleeve area
head as follows:
• Glow plug sleeve area
5. If leaks are observed, install a new cylinder head.
6. Clean all valve guides using a nylon brush, soap
and water. Blow out any residue with filtered
compressed air.
7. Position an inspection light at the bottom of the
valve guide bores and examine the walls for
burning or cracking. Replace cylinder head, if
necessary.
 CYLINDER HEAD AND VALVE TRAIN 239

Push Rods
1. Inspect push rods for wear and deposits that
may restrict oil flow into rocker arm assemblies.
Replace push rod if necessary.

Figure 401 Measurement of Small Hole Gauge

(valve guide ID)

8. Measure each valve guide using a Valve Guide

Gauge Tool (page 262) and a 0-1 inch micrometer.
Figure 402 Push rod runout
NOTE: If valve guide inside diameter exceeds
specifications (page 260), install a new cylinder head.
9. Measure the valve guides within 0.64 mm (0.025 2. Roll push rod on a flat surface to check runout. If a
in) of each end and 90° from the crankshaft center push rod is not straight, see Specifications (page
line. Record the readings in order to determine 260) for runout. If specifications are exceeded,
the valve-to-guide running clearance. replace push rod.

10. Using valve guide inside diameter and valve

stem diameter measurements, determine Valves
valve stem-to-guide running clearance. See
Specifications (page 260). Replace valve if 1. Use a wire brush to remove all carbon from valve
necessary. stems and heads.

11. Clean valve seat area using suitable solvent, 2. Inspect each valve. Replace valves having burn
before inspection. marks, warping, scuffing, bending or valve tip
spalling.
12. Inspect exhaust valve seats for burned or cracked
conditions. If any of these conditions exist, 3. Measure each valve stem diameter for wear using
replace cylinder head. a 0-1 inch micrometer. Measure valves at three
locations 90° apart. Replace valves with stem
13. Using a dial caliper, measure valve seat width. diameter less than minimum valve stem diameter
See Specifications (page 260). Replace cylinder specification. See Specifications (page 260).
head if necessary.
240 CYLINDER HEAD AND VALVE TRAIN

1. Clean all valve springs in a suitable solvent.

2. Inspect valve springs for rust, pitting, distortion,
and cracks. If these conditions exist, replace the
valve springs.

Figure 403 Measurement of valve face margin

CAUTION: To prevent engine damage, maintain

a minimum valve face margin across the entire
valve face. An insufficient margin will not provide
correct heat dissipation, leading to valve warping
or breakage. Replace valve if margin is less than
specification. See Specifications (page 260).
Figure 404 Flatness check of valve spring
4. Use a dial caliper to measure valve face margin
at four locations (90° apart).
3. Inspect to verify valve spring ends are flat and
Valve Springs square to prevent lateral loads on valve stem.
Replace valve springs if necessary.
CAUTION: To prevent engine damage, do not wire
brush or grind valve springs. This can cause fatigue 4. Measure valve spring tension using a Valve
cracks and spring failure. Spring Tester (page 262).
 CYLINDER HEAD AND VALVE TRAIN 241

Figure 406 Fuel gallery

3. Clean fuel gallery with Fuel Gallery Cleaning

Brush (page 262).

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
Figure 405 Measurement of valve spring free 4. Use filtered compressed air to clean out debris
length under load from fuel gallery port.
5. Install a new seal on fuel rail plug.
5. Apply correct test loads to each spring and 6. Install fuel rail plug assembly and tighten to
determine whether specified heights are special torque (page 261).
achieved. See Specifications (page 260).
Replace valve springs if necessary.
Glow Plug Sleeve Bore
Clean glow plug bore with Glow Plug Sleeve Seat Wire
Valve Stem Keys Brush (page 262).
1. Clean all valve stem keys with a suitable cleaning
solvent. Dual Rocker Fulcrums
2. Inspect inside and outside of valve stem keys
for wear. Replace worn valve stem keys, if WARNING: To prevent personal injury or
necessary. death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
1. Clean parts with a suitable solvent. Use filtered
Fuel Injector Sleeve Bore and Gallery
compressed air to dry parts.
1. Use Injector Sleeve Brushes (page 262) in fuel
2. Inspect each rocker arm pivot foot for excessive
injector bore to remove deposits and hardened
wear, and corresponding valve bridge for pitting
sealant.
or scuffing. Replace rocker arm assemblies and
2. Remove fuel rail plug assembly. valve bridges, if necessary.
242 CYLINDER HEAD AND VALVE TRAIN

3. Inspect each 3/8” pivot ball and rocker arm socket 4. Inspect fulcrum plate ball socket for excessive
for scuffing. Replace 3/8” pivot ball and rocker wear. Inspect bolts for thread damage. Replace
arm, if necessary. worn components, if necessary.
 CYLINDER HEAD AND VALVE TRAIN 243

Installation
Dual Fulcrum Plate Assemblies

Figure 409 Rocker arm assembly installation

(typical)
1. 3/8” pivot ball
Figure 407 Dual rocker fulcrum plate (typical) 2. Rocker arm assembly
1. Intake end 3. Rocker arm clip
2. Exhaust end 4. Dual rocker fulcrum plate

2. Apply a small amount of lithium grease (page 262)

to dual rocker fulcrum plate pockets.
3. Insert 3/8” pivot ball in dual rocker fulcrum plate
pockets.

Figure 408 Rocker arm clip (typical)

1. Dual rocker fulcrum plate
2. Rocker arm clip

1. Install a new rocker arm clip on both sides of dual Figure 410 Installation of rocker arm (typical)
rocker fulcrum plate. 1. Rocker arm clip
2. Rocker arm assembly
3. Dual rocker fulcrum plate
244 CYLINDER HEAD AND VALVE TRAIN

4. Position lower part of rocker arm assembly under

rocker arm clip and push it upward. Use thumb to
push upper part of rocker arm assembly over 3/8”
pivot ball.
5. Check for freedom of movement of rocker arm on
dual rocker fulcrum plate.
6. Repeat steps 1–4 for the other rocker arm on the
dual rocker fulcrum plate.

Glow Plug Sleeves

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi). Figure 412 Glow Plug Sleeve Installer
NOTE: Make sure the glow plug recess was cleaned
out with the Glow Plug Sleeve Seat Wire Brush (page 2. Install glow plug sleeve in cylinder head with Glow
262), rinsed with a suitable cleaning solution, and Plug Sleeve Installer (page 262). Continue to tap
dried with compressed air. the Glow Plug Sleeve Installer until the glow plug
sleeve bottoms out in the recess.
3. Clean glow plug sleeve with Glow Plug Sleeve
Brush (nylon) (page 262) and solvent. Make sure
liquid gasket is cleaned out before it hardens.
4. Inspect the inside surface of the installed glow
plug sleeve. If nicks and scratches are evident,
replace the glow plug sleeve again. Make sure
that the installation tool is not causing such
damage. Use a different installation tool if
necessary.
Figure 411 Application of Loctite® 620 Retaining
Compound to glow plug sleeve
Fuel Injector Sleeves
1. Wall (end)
NOTE: Verify injector bore is completely clean and dry.
2. Upper wall (top)
1. Place new fuel injector sleeve on Injector Sleeve
Installer (page 262).
1. Apply Loctite® 620 Retaining Compound (page
262) to the wall and upper wall on glow plug
sleeve.
 CYLINDER HEAD AND VALVE TRAIN 245

bore until the sleeve bottoms. If any liquid gasket

gets inside injector sleeve, it must be cleaned out
before it hardens.
5. Inspect the inside surface of the installed fuel
injector sleeve. If nicks and scratches are
evident, replace the fuel injector sleeve again.
Make sure that the installation tool is not causing
such damage. Use a different installation tool if
necessary.
CAUTION: To prevent engine damage, insert a clean
paper towel inside injector sleeve to keep foreign
material out.
6. Cover injector sleeve.

Valves
Figure 413 Application of Loctite® 620 Retaining
Compound to fuel injector sleeve
1. Wall (end)
2. Upper wall (top)

2. Apply Loctite® 620 Retaining Compound (page

262) to fuel injector sleeve.
3. Center fuel injector sleeve into injector bore.

Figure 415 Valve seal assembly (typical)

NOTE: Valve seal assembly will not seat completely

over valve guide by hand. Seals can be seated using
a deep socket and a rubber mallet to provide a positive
contact with the machined base.
1. Lubricate inside of new valve seal assembly with
clean engine oil and install on valve guide.
Figure 414 Installation of fuel injector sleeve
into injector bore 2. Lubricate valve stem with clean engine oil and
insert valve in cylinder head.
3. Install valve spring over valve seal.
4. Use a hammer to drive Injector Sleeve Installer
(page 262) with fuel injector sleeve in fuel injector 4. Install valve spring retainer on top of valve spring.
246 CYLINDER HEAD AND VALVE TRAIN

Roller Hydraulic Cam Followers

Figure 416 Valve spring compression (typical)

1. Valve stem key (2)
Figure 417 Roller hydraulic cam followers
2. C Type Valve Spring Compressor
(typical)
3. Valve spring retainer
4. Valve 1. Roller hydraulic cam follower (4)
2. Roller follower guide

CAUTION: To prevent engine damage, make sure

when the valve spring compressor is released the CAUTION: To prevent engine damage, keep cam
inside bead of each key locks into the key groove of followers and push rods in the order removed and
the valve stem. install in original order.
5. Compress valve spring with C Type Valve Spring NOTE: Place rollers hydraulic cam followers in roller
Compressor (page 262), install two valve stem follower guides with the lubrication holes oriented as
keys, and release spring compressor. noted during removal.
6. After valve replacement, measure valve 1. Lubricate and place each roller hydraulic cam
head recession relative to deck to confirm follower in its respective roller follower guide.
reconditioning. See Specifications (page 260).
 CYLINDER HEAD AND VALVE TRAIN 247

2. Lubricate roller hydraulic cam followers with clean

engine oil and install cam followers and guide
assemblies in correct location.
3. Install two lifter guide bolt with washer
assemblies. Tighten bolts to special torque (page
261).

Figure 418 Cam follower and guide assemblies

(typical)
1. Lifter guide bolt with washer assembly (2)
2. Cam follower and guide assembly (2)
248 CYLINDER HEAD AND VALVE TRAIN

Cylinder Heads
NOTE: Cam followers cannot be removed or replaced
when cylinder head is bolted to the crankcase. Be
sure to complete required work on cam followers
before installing cylinder head.
1. For left cylinder head, install lifting eye and two flat
countersunk screws. Tighten screws to special
torque (page 261).
2. For right cylinder head, install lifting eye and two
M10 x 25 bolts. Tighten bolts to special torque
(page 261).

Figure 420 Clearance holes for spring dowel

pins (typical)

WARNING: To prevent personal injury or

death, wear safety glasses with side shields to
protect eyes. Limit compressed air pressure to
207 kPa (30 psi).
CAUTION: To prevent engine damage, clean and
blow dry threads in the crankcase bolt holes with
filtered compressed air. Dirt or oil in holes may cause
binding or an incorrect torque reading.
Figure 419 Cylinder head spring dowel pins in CAUTION: To prevent engine damage, remove debris
crankcase (typical) from cylinder head. If debris is not removed, a faulty
seal between the cylinder head and gasket will cause
oil, coolant, and compression leaks. Do not apply
3. Install two spring dowel pins in upper crankcase sealant to head gasket surfaces.
assembly.
CAUTION: To prevent engine damage, install a new
cylinder head gasket with part number facing up.
NOTE: Use care to avoid scratching blue compound
on cylinder head gaskets.
4. Align a new cylinder head gasket with spring
dowel pins and press to install.
 CYLINDER HEAD AND VALVE TRAIN 249

Figure 421 Installation of cylinder head lifting Figure 422 Cylinder head bolts (typical)
bracket (typical)
1. M8 x 70 bolt (5)
1. Cylinder Head Lifting Bracket 2. Cylinder head bolt (10)
2. Lifting bracket mounting bolt (4)

CAUTION: To prevent engine damage, install new

head bolts. Lightly lubricate new bolt threads and
WARNING: To prevent personal injury or mating surfaces of bolt flanges with clean engine
death, mount cylinder head lifting bracket on oil. Too much oil will cause hydrostatic lock and give
center of cylinder head. Also, make sure the incorrect torque reading.
lifting hook has a safety latch.
CAUTION: To prevent engine damage, lubricate
5. Install Cylinder Head Lifting Bracket (page 262) threads of new cylinder head bolts with clean engine
and four bolts on center of cylinder head (if oil. Do not use anti-seize compounds, grease or
removed). Tighten lifting bracket mounting bolts. other lubricants. This will cause an incorrect torque
reading.
CAUTION: To prevent engine damage, do not drop or
slide cylinder head on head gasket. This will damage 8. Install and finger tighten 10 cylinder head bolts
the head gasket and spring dowel pins, resulting in and five M8 x 70 bolts.
leakage.
9. Remove four lifting bracket bolts and cylinder
6. Attach lifting hoist hook or lifting sling to lifting head lifting bracket.
bracket. Raise cylinder head and align with dowel
CAUTION: To prevent engine damage, use only
sleeves previously installed in crankcase.
permanent ink markers to identify bolt torque
7. Lower cylinder head on crankcase. orientation.
250 CYLINDER HEAD AND VALVE TRAIN

Figure 423 Cylinder head bolts tightening sequence

NOTE: For proper cylinder head surface seating and 5. Rotate cylinder head bolts numbered
sealing, follow the correct tightening sequence. 1 through 10 another 90° (1/4 turn)
clockwise in numerical sequence.
10. Tighten the cylinder head bolts according to the
following steps: 6. Tighten M8 x 70 cylinder head bolts
numbered 11 through 15 to 24 N·m (18
1. Tighten cylinder head bolts numbered
lbf·ft).
1 through 10 to 95 N·m (70 lbf·ft) in
numerical sequence. 7. Tighten M8 x 70 cylinder head bolts
numbered 11 through 15 to 31 N·m (23
2. Loosen cylinder head bolts numbered 1
lbf·ft).
through 10 in numerical sequence.
3. Tighten cylinder head bolts numbered
1 through 10 to 156 N·m (115 lbf·ft) in Rocker Arm Supports, Push Rods, and Valve
numerical sequence. Bridges
4. Rotate cylinder head bolts numbered 1 1. Apply lithium grease (page 262) to valve stem tips
through 10 an additional 90° (1/4 turn) and to valve bridge pockets.
clockwise in numerical sequence.
 CYLINDER HEAD AND VALVE TRAIN 251

4. Apply clean engine oil to end of each push rod and

install to original locations with the copper finish
end on top.
NOTE: Rotate crankshaft and observe the intake push
rod at number 3 cylinder. Cylinder number 1 is in firing
position when intake push rod at cylinder number 3
indicates cam lift, and the crankshaft damper dowel
pin is at the 10:30 position.
5. Position crankshaft so that cylinder number 1 is at
Top Dead Center (TDC) and in firing position.

Figure 424 Valve bridge (typical)

2. Place each of the previously marked valve bridges

on their respective valve stems.

Figure 426 Dual rocker fulcrum plates (typical)

1. M10 x 70 bolt (8)
2. Dual fulcrum plate assembly (4)

CAUTION: To prevent engine damage, make sure

push rods have seated in the rocker arm pocket.
6. Install dual fulcrum plate assemblies for cylinder
Figure 425 Push rod assemblies and rocker arm numbers 1, 2, 7, and 8.
support (typical) 7. Install and tighten M10 x 70 bolts for cylinder
1. Push rod assembly (8) numbers 1, 2, 7, and 8 as follows:
2. Rocker arm support 1. Hand tighten all bolts.
2. Make sure that pivot foot is centered on
3. Install rocker arm support. valve bridge.

CAUTION: To prevent engine damage, keep cam 3. Tighten inboard (upper) bolts to 61 N·m
followers and push rods in the order removed and (45 lbf·ft).
install in original order. 4. Tighten outboard (lower) bolts to 61 N·m
CAUTION: To prevent engine damage, seat push (45 lbf·ft).
rods in the hydraulic roller follower sockets.
252 CYLINDER HEAD AND VALVE TRAIN

5. Make sure that pivot foot is centered on Valve Cover Base

valve bridge. If pivot foot is not centered
on valve bridge, remove and reinstall dual
fulcrum plate assembly in question.
NOTE: Rotate crankshaft and observe the intake push
rod at number 8 cylinder. Cylinder number 4 is in firing
position when intake push rod at cylinder number 8
indicates cam lift, and the crankshaft damper dowel
pin is at the 10:30 position.
8. Rotate crankshaft 360° (full turn) so that cylinder
number 4 is in firing position.
CAUTION: To prevent engine damage, make sure
push rods have seated in the rocker arm pocket.
9. Install dual fulcrum plate assemblies for cylinder
numbers 3, 4, 5, and 6.
10. Install and tighten M10 x 70 bolts for cylinder Figure 427 Valve cover base gasket (typical)
numbers 3, 4, 5, and 6 as follows:
1. Hand tighten all bolts. 1. Install a new valve cover base gasket.
2. Make sure that pivot foot is centered on
valve bridge.
3. Tighten inboard (upper) bolts to 61 N·m
(45 lbf·ft).
4. Tighten outboard (lower) bolts to 61 N·m
(45 lbf·ft).
5. Make sure that pivot foot is centered on
valve bridge. If pivot foot is not centered
on valve bridge, remove and reinstall dual
fulcrum plate assembly in question.

Figure 428 Valve cover base assembly (typical)

1. M6 x 30 bolt (11)
2. Valve cover base assembly

2. Install valve cover base assembly and 11 M6 x 30

bolts. Tighten bolts to special torque (page 261).
 CYLINDER HEAD AND VALVE TRAIN 253

Glow Plugs NOTE: Make sure to install new combustion gasket

oriented as noted during removal.
1. Install a new combustion gasket onto injector tip.
2. To seat gasket, push on gasket with a deep
socket.
3. Remove and discard old fuel injector seal.
4. Install a new fuel injector seal. Lubricate fuel
injector seal with clean engine oil.

Figure 429 Glow plugs (typical)

Install four glow plugs. Tighten glow plugs to special

torque (page 261).

Fuel Injector and Rail Assemblies

Figure 431 Fuel injector assembly (typical)

1. Fuel injector assembly (4)
2. Injector clamp bolt (4)
3. Injector hold down clamp (4)

CAUTION: To prevent engine damage, do not use

power tools.
5. Install fuel injector assembly by lowering fuel
injector and injector hold down clamp assembly
as one unit into injector bore.
NOTE: Injectors must be fully seated, but moveable,
for installation of fuel rail to injector tube assemblies.

Figure 430 Fuel injector seal and combustion 6. Hand start clamp bolts. Pre-tighten injector clamp
gasket (typical) bolts to 2 N·m (18 lbf·in).

1. Fuel injector seal 7. Apply a water based rubber lubricant, such as

2. Combustion gasket P-80® Rubber Lubricant or equivalent (page 262),
to outer and inner diameters of fuel supply line
seal.
CAUTION: To prevent engine damage, install new
fuel injector seal and combustion gasket if a fuel
injector is removed.
254 CYLINDER HEAD AND VALVE TRAIN

NOTE: Rail assembly must be fully seated but

moveable for installation of fuel rail to injector tube
assemblies.
9. Install rail assembly and two M8 x 30 bolts. Hand
tighten bolts.
10. Remove all Fuel System Caps (page 262) from
fuel rail and fuel injector assemblies.

Figure 432 Fuel supply line seal installation

(typical)
1. Fuel supply line seal
2. Valve cover base

Figure 434 Fuel rail to injector tube assemblies

8. Install a new fuel supply line seal by pressing it (typical)
with a proper size socket toward the outside of the
1. Fuel rail to injector tube assembly (4)
valve cover base.
2. Tube nut (8)

WARNING: To prevent personal injury or

death, whenever any fuel line (tubing) in the
high-pressure fuel system is removed, it must be
replaced with new.
11. Position four new fuel rail to injector tube
assemblies between fuel injector assemblies and
rail assembly.

Figure 433 Rail assembly (typical)

1. Rail assembly
2. M8 x 30 bolt (2)
 CYLINDER HEAD AND VALVE TRAIN 255

12. Fully hand start and seat nuts onto mating

connections of all fuel tubes, then pre-tighten with
a crowfoot torque wrench following sequence
shown in (Figure 435) to 2 N·m (18 lbf·in).
13. Tighten injector clamp bolts to 38 N·m (28 lbf·ft).
14. Tighten two M8 x 30 rail assembly bolts to 31 N·m
(23 lbf·ft).
15. Using a crowfoot torque wrench and a second
wrench to hold the fuel injector fittings, continue
to tighten fuel rail to injector tube assembly
nuts following sequence shown in (Figure 435).
Tighten four nuts on the fuel injector assemblies
first, then four nuts on the rail assembly as follows:

Figure 435 Fuel rail to injector tube assemblies a. Tighten nuts to 12 N·m (106 lbf·in).
tightening sequence (typical) b. Tighten nuts an additional 60°.
16. Install Under Valve Cover (UVC) harness (page
NOTE: Hold fuel rail to injector tube assemblies while 68).
hand tightening nuts to assure proper assembly of
joints.
NOTE: When using a crowfoot extension make
sure to adjust the torque settings as necessary to
compensate for any length added to the torque
wrench. See Appendix B - Torques (page 384).
256 CYLINDER HEAD AND VALVE TRAIN

Valve Covers and Related Components

Right Valve Cover
1. Install a new valve cover gasket.

Figure 437 Left valve cover bolt and stud bolt

assemblies
1. Valve cover bolt assembly (4)
2. Valve cover stud bolt assembly (6)

Figure 436 Right valve cover bolt and stud bolt

assemblies
2. Position left valve cover on valve cover base.
1. Valve cover bolt assembly (3)
CAUTION: To prevent engine damage, do not use air
2. Valve cover stud bolt assembly (7)
tools to remove or install valve covers.
3. Install four valve cover bolt assemblies and six
2. Position right valve cover on valve cover base valve cover stud bolt assemblies. Tighten bolts
assembly. and stud bolts to special torque (page 261).
CAUTION: To prevent engine damage, do not use air
tools to remove or install valve covers.
3. Install three valve cover bolt assemblies and
seven valve cover stud bolt assemblies. Tighten
bolts and stud bolts to special torque (page 261).

Left Valve Cover

1. Install a new valve cover gasket.

Figure 438 Oil fill extension O-ring seal

4. Install a new oil fill extension O-ring seal.

Lubricate O-ring seal with clean engine oil.
 CYLINDER HEAD AND VALVE TRAIN 257

Figure 439 Oil fill extension Figure 441 Breather oil drain assembly to
crankcase M12 fitting

5. Install oil fill extension. Tighten to special torque

(page 261). 2. Install M12 fitting. Tighten fitting to special torque
(page 261).

Breather Assembly and Components

Figure 442 Breather oil drain assembly

components
Figure 440 M12 fitting O-ring seal
1. 1/2” preload clamp
2. Nylon tube assembly
3. 3/8” preload clamp (3)
1. Install a new breather oil drain assembly to
4. Check valve assembly
crankcase M12 fitting O-ring seal.
5. Steel tube

3. Connect steel tube to 3/8” hose on nylon tube

assembly and secure with a 3/8” preload clamp.
4. Connect steel tube to check valve assembly and
secure with a 3/8” preload clamp.
258 CYLINDER HEAD AND VALVE TRAIN

7. Install breather support and four M6 nuts. Tighten

nuts to special torque (page 261).

Figure 443 Breather oil drain assembly

1. M6 nut
2. Breather oil drain assembly
Figure 445 Breather inlet adapter O-ring seal
3. 3/8” preload clamp

8. Install a new O-ring seal on breather inlet adapter.

5. Connect breather oil drain assembly to M12 fitting
Lubricate O-ring seal with clean engine oil.
and secure with clamp.
6. Install M6 nut at breather oil drain assembly
clamp, and tighten to standard torque (page 383).

Figure 446 Breather inlet adapter

Figure 444 Breather support 9. Install breather inlet adapter. Tighten to special
torque (page 261).
1. M6 nut (4)
2. Breather support
 CYLINDER HEAD AND VALVE TRAIN 259

11. Connect breather assembly to breather oil drain

assembly and secure with clamp.
12. Install two M8 x 35 bolts and tighten to standard
torque (page 383).

Figure 447 Exhaust Back Pressure (EBP) tube

assembly
1. M6 nut
2. EBP tube assembly

Figure 449 Breather inlet hose

10. Install EBP tube assembly and M6 nut. Tighten
1. Breather inlet hose
nut to special torque (page 261).
2. Clamp (2)

13. Install breather inlet hose and two clamps.

Figure 448 Breather assembly bolts

1. M8 x 35 bolt (2)
2. Breather assembly
3. 1/2” preload clamp
4. Breather oil drain assembly
260 CYLINDER HEAD AND VALVE TRAIN

Specifications
Table 22 Cylinder Head and Valve Train
Exhaust Valves
Stem diameter 6.946 to 6.964 mm (0.2735 to 0.2742 in)
Stem to guide running clearance (max.
0.1846 mm (0.00727 in)
allowable before replacement) diametrically
Valve face angle from center line 50.5 – 50.75°
Valve margin (minimum) 1.53 mm (0.060 in)
Valve recession in head 0.37 – 0.73 mm (0.0146 – 0.0287 in)
Intake Valves
Stem diameter 6.946 to 6.964 mm (0.2735 to 0.2742 in)
Stem to guide running clearance (max.
0.1846 mm (0.00727 in)
allowable before replacement)

Valve face angle from center line 53.0 – 53.25°

Valve margin (minimum) 1.40 mm (0.055 in)

Valve recession in head 0.37 – 0.73 mm (0.0146 – 0.0287 in)
Cylinder Heads
Valve guide inside diameter 7.003 to 7.029 mm (0.276 to 0.277 in)
Valve guide bore runout 0.06 mm (0.00236 in)
Valve guide taper (maximum) 0.10 mm (0.004 in)
Valve seat width (intake) 1.80 to 2.56 mm (0.071 to 0.101 in)
Valve seat width (exhaust) 1.48 to 2.24 mm (0.058 to 0.088 in)
Valve seat angle (intake) from center line of
52.5 – 52.75°
valve guide
Valve seat angle (exhaust) from center line of
50.0 – 50.25°
valve guide
0.025 mm per 25 x 25 mm
Gasket surface flatness
Maximum 0.051 mm (0.002 in) per check point
Overall thickness of cylinder head
95 ± 0.48 mm (3.74 ± 0.018 in)
(deck-to-deck)
Valve Spring:
Solid height 36.1 mm (1.42 in)
Compressed* 46.50 mm @ 340 ± 17 N (1.83 in @ 76.5 ± 3.8 lbf)
Compressed* 38.30 mm @ 850 ± 43 N (1.51 in @ 191.1 ± 9.7 lbf)
* Spring must be compressed to a solid height before checking test loads.
 CYLINDER HEAD AND VALVE TRAIN 261

Table 22 Cylinder Head and Valve Train (cont.)

Push Rods
Runout (maximum) 0.5 mm (0.02 in)

Special Torque
Table 23 Cylinder Head and Valve Train
Lifting eye flat countersunk screws (left cylinder head) 41 N·m (30 lbf·ft)
Lifting eye bolts (right cylinder head) 61 N·m (45 lbf·ft)
Breather inlet adapter 14 N·m (124 lbf·in)
Exhaust Back Pressure (EBP) tube assembly nut 9 N·m (80 lbf·in)
Cylinder head bolt See tightening steps in procedure
Injector clamp bolt See tightening steps in procedure
Dual fulcrum plate assembly bolts See tightening steps in procedure
Rail assembly bolts See tightening steps in procedure
Fuel rail to injector tubes See tightening steps in procedure
Glow plugs 18 N·m (159 lbf·in)
Breather oil drain assembly to crankcase M12 fitting 25 N·m (18 lbf·ft)
Breather support nuts 13 N·m (115 lbf·in)
Valve cover bolt and stud bolt assemblies 9 N·m (80 lbf·in)
Oil fill extension 14 N·m (126 lbf·in)
Lifter guide bolts with washer assembly 13 N·m (115 lbf·in)
Valve cover base assembly bolts 13 N·m (115 lbf·in)
Fuel rail plug assembly 27 N·m (20 lbf·ft)
262 CYLINDER HEAD AND VALVE TRAIN

Special Service Tools

Table 24 Cylinder Head and Valve Train
Description Tool Number
Cylinder Head Bolt Tap ZTSE4744
Cylinder Head Lifting Bracket ZTSE4535
Cylinder Head Pressure Test Plate ZTSE4534
Dye Penetrant Kit PT-7191
Fuel Gallery Cleaning Brush ZTSE4541
Injector Cup ZTSE4709
Fuel Injector Rack Holder ZTSE4299B
Fuel Injector Tip Cleaning Brush ZTSE4301
Fuel System Caps ZTSE4710
Glow Plug Sleeve Brush (nylon) ZTSE4533
Glow Plug Sleeve Installer ZTSE4532
Glow Plug Sleeve Remover ZTSE4531
Glow Plug Sleeve Seat Wire Brush ZTSE4589
Injector Sleeve Brushes ZTSE4751
Injector Sleeve Installer ZTSE4733
Injector Sleeve Remover ZTSE4732
Lithium Grease Obtain locally
Loctite® 620 Retaining Compound Obtain locally
P-80® Rubber Lubricant or equivalent Obtain locally
Slide Hammer Kit ZTSE4398
Straightedge Obtain locally
Valve Guide Gauge Tool ZTSE4577
C Type Valve Spring Compressor ZTSE1846
Valve Spring Tester ZTSE2241
Dial Caliper Obtain locally
Feeler Gauge Obtain locally
Pressure Test Regulator and Gauge Obtain locally
0-1 inch Micrometer Obtain locally
3-4 inch Micrometer Obtain locally
Inspection Mirror Obtain locally
 OIL COOLER AND FILTER HOUSING 263

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268
Oil Filter Housing and Oil Filter Base Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268
Oil Cooler Cover Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .269

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271

Oil Cooler Cover and Oil Filter Base Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271
Oil Cooler Cover Assembly Leaks (Coolant Side). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .271

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Oil Cooler Cover Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272
Oil Filter Housing and Oil Filter Base Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .272

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

264 OIL COOLER AND FILTER HOUSING
 OIL COOLER AND FILTER HOUSING 265

Exploded Views

Figure 450 Oil filter housing assembly

1. Oil filter cap 4. O-ring seal 7. M5 x 18 screw
2. M8 x 75 bolt (4) 5. Oil filter return tube assembly 8. Oil filter element
3. Oil filter housing 6. Return tube gasket 9. Oil filter cap seal
266 OIL COOLER AND FILTER HOUSING

Figure 451 Oil filter base and oil cooler cover assemblies
1. M6 X 25 screw (10) 5. Oil cooler cover assembly 8. Base to cover gasket (coolant
2. Oil filter base assembly 6. Oil cooler cover gasket (oil side) side)
3. Base to cover gasket (oil side) 7. Oil cooler cover gasket (coolant
4. M8 x 30 bolt (8) side)
 OIL COOLER AND FILTER HOUSING 267

Figure 452 Oil cooler cover assembly and oil filter base assembly location details
1. Unfiltered oil flow from pump 7. Coolant outlet to cooling system 14. Engine Oil Pressure (EOP)
2. Oil cooler outlet (oil) 8. Oil drain valve assembly sensor port
3. Filtered oil to crankcase galleries 9. Diagnostic coupling assembly 15. Turbocharger oil supply port
and other components 10. Diagnostic coupling dust cap 16. Coolant outlet from oil cooler
4. Filtered oil to crankcase galleries 11. Filter inlet check valve 17. Oil cooler inlet (oil)
and other components 12. Oil cooler bypass valve 18. Oil drain to sump
5. Coolant inlet to oil cooler 13. Engine Oil Temperature (EOT)
6. Coolant inlet from water pump sensor port
268 OIL COOLER AND FILTER HOUSING

Removal NOTE: See the following service sections for

information on removal of components prior to this
section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Fuel System
with applicable regulations. Recycle
or dispose of engine fluids, filters, and Oil Filter Housing and Oil Filter Base Assemblies
other contaminated materials according to
applicable regulations.

WARNING: To prevent personal injury or

death, read all safety instructions in the "Safety
Information" section of this manual.

WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set
parking brake, and block wheels before doing
diagnostic or service procedures.

WARNING: To prevent personal injury or

death, disconnect the main battery negative
terminal before disconnecting or connecting Figure 453 Oil filter cap
electrical components.

1. Remove oil filter cap and oil filter element. Discard

WARNING: To prevent personal injury or
oil filter element and oil filter cap seal.
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

WARNING: To prevent personal injury or

death, do not smoke and keep fuel away from
flames and sparks.

Figure 454 Oil filter housing

1. M8 x 75 bolt (4)
2. Oil filter housing
 OIL COOLER AND FILTER HOUSING 269

2. Remove four M8 x 75 bolts and oil filter housing. 7. Remove ten M6 x 25 screws and oil filter base
assembly.
3. Remove and discard O-ring seal.

Figure 457 Oil filter base assembly gaskets

Figure 455 Oil filter return tube assembly
1. Base to cover gasket (coolant side)
1. Oil filter return tube assembly
2. Base to cover gasket (oil side)
2. M5 x 18 screw

8. Remove and discard base to cover gasket

4. Remove M5 x 18 screw.
(coolant side).
5. Turn oil filter return tube assembly
9. Remove and discard base to cover gasket (oil
counterclockwise and remove from oil filter base
side).
assembly.
6. Remove and discard return tube gasket.
Oil Cooler Cover Assembly
CAUTION: To prevent engine damage after a
catastrophic engine failure, install a new oil cooler
cover assembly and oil cooler. Debris cannot be
removed from the oil cooler.

Figure 456 Oil filter base assembly

1. M6 x 25 screw (10)
2. Oil filter base assembly
270 OIL COOLER AND FILTER HOUSING

Figure 458 Oil cooler cover assembly Figure 459 Oil cooler cover assembly gaskets
1. M8 x 30 bolt (8) 1. Oil cooler cover gasket (coolant side)
2. Oil cooler cover assembly 2. Oil cooler cover gasket (oil side)

1. Remove eight M8 x 30 bolts and oil cooler cover 2. Remove and discard oil cooler cover gasket
assembly. (coolant side).
3. Perform air pressure leakage test for oil cooler
cover assembly leaks (coolant side) (page 271).
4. Remove and discard oil cooler cover gasket (oil
side).
 OIL COOLER AND FILTER HOUSING 271

Cleaning, Inspection, and Testing NOTE: The oil filter base assembly and new gaskets
must be installed on the oil cooler cover assembly
Oil Cooler Cover and Oil Filter Base Assemblies
before a pressure test can be done. The new gaskets
1. Drain and flush oil cooler cover assembly, oil filter can be reused for final assembly.
base assembly, and oil filter housing assembly to
1. Install Oil Cooler Pressure Test Plate (page 275)
remove internal residue.
on oil cooler cover assembly.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields. WARNING: To prevent personal injury or
Limit compressed air pressure to 207 kPa (30 psi). death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Dry all components thoroughly with compressed
air. 2. Attach an air pressure regulator (page 275)
to oil cooler pressure test plate. Connect to
compressed air supply and adjust air pressure to
Oil Cooler Cover Assembly Leaks (Coolant Side) approximately 172 to 207 kPa (25 to 30 psi).
CAUTION: To prevent engine damage, do not
submerge the oil cooler in water. This will introduce
water into oil passages.
3. Spray soapy water on oil cooler and between oil
cooler and oil cooler cover.
4. Inspect for air bubbles on the oil cooler as well as
between oil cooler and oil cooler cover.
5. If leaks are detected, install a new oil cooler cover
assembly.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
6. Remove soapy water residue and blow off with
Figure 460 Oil cooler cover assembly pressure compressed air.
test
1. Air pressure regulator
2. Oil Cooler Pressure Test Plate
272 OIL COOLER AND FILTER HOUSING

Installation Oil Filter Housing and Oil Filter Base Assemblies

Oil Cooler Cover Assembly

Figure 463 Oil filter base assembly gaskets

Figure 461 Oil cooler cover gaskets 1. Base to cover gasket (coolant side)
2. Base to cover gasket (oil side)
1. Oil cooler cover gasket (coolant side)
2. Oil cooler cover gasket (oil side)
1. Install new base to cover gasket (coolant side).
1. Install new oil cooler cover gasket (coolant side). 2. Install new base to cover gasket (oil side).
2. Install new oil cooler cover gasket (oil side).

Figure 464 Oil filter base assembly

Figure 462 Oil cooler cover assembly 1. M6 x 25 screw (10)
1. M8 x 30 bolt (8) 2. Oil filter base assembly
2. Oil cooler cover assembly

3. Install oil filter base assembly and ten M6 x 25

3. Install oil cooler cover assembly and eight M8 x 30 screws. Tighten screws to special torque (page
bolts. Tighten bolts to special torque (page 275). 275).
 OIL COOLER AND FILTER HOUSING 273

Figure 465 Return tube gasket and O-ring seal Figure 467 Oil filter return tube assembly
1. O-ring seal 1. Oil filter return tube assembly
2. Return tube gasket 2. M5 x 18 screw

4. Install a new oil filter return tube gasket and filter 6. Install and tighten M5 x 18 oil filter return tube
housing O-ring seal. Lubricate gasket and seal assembly screw to special torque (page 275).
with clean engine oil.

Figure 468 Oil filter housing

Figure 466 Oil Filter return tube assembly
position 1. M8 x 75 bolt (4)
2. Oil filter housing

5. Install and rotate oil filter return tube assembly

clockwise to align hold down tab with screw hole 7. Install oil filter housing and four M8 x 75 bolts.
in oil filter base assembly. Tighten bolts to special torque (page 275).
274 OIL COOLER AND FILTER HOUSING

8. Install a new oil filter element.

9. Install oil filter cap seal. Lubricate seal with clean
engine oil.
10. Install oil filter cap and tighten to special torque
(page 275).

Figure 469 Oil filter cap

 OIL COOLER AND FILTER HOUSING 275

Specifications
Table 25 Oil Cooler and Oil Filter
Oil Cooler
Type Full flow, fin
Location Engine valley (forward)
Oil Filter
Type Cartridge, full flow - disposable
Location Front, oil cooler mounted
Filter bypass location Oil filter return tube assembly

Special Torque
Table 26 Oil Cooler Cover and Oil Filter Housing
Oil cooler cover assembly bolts 31 N·m (23 lbf·ft)
Oil filter cap 26 N·m (18 lbf·ft)
Oil filter return tube assembly screw – with
7 N·m (62 lbf·in)
new oil filter base assembly
Oil filter return tube assembly screw – with
5 N·m (44 lbf·in)
reinstalled oil filter base assembly
Oil filter housing bolts 22 N·m (125 lbf·in)
Oil filter base assembly screws – with new
10 N·m (89 lbf·in)
oil cooler cover assembly
Oil filter base assembly screws – with
7 N·m (62 lbf·in)
reinstalled oil cooler cover assembly

Special Service Tools

Table 27 Oil Cooler

Description Tool Number
Air Pressure Regulator Obtain locally
Oil Cooler Pressure Test Plate ZTSE4730
276 OIL COOLER AND FILTER HOUSING
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 277

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
Engine Mount Rear Brackets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
Flywheel Assembly (Manual Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
Flex Plate flywheel Assembly (Automatic Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
Crankshaft Rear Oil Seal and Wear Sleeve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .287
Crankshaft Rear Oil Seal Carrier and Power Steering Idler Gear Assembly. . . . . . . . . . . . . . . . . . . . . . .288
Crankshaft Flange. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289
Flywheel Housing and Power Steering Idler Shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290

Cleaning, Inspection, and Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292

Flex Plate Flywheel Assembly (Automatic Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
Flywheel Assembly (Manual Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
Flywheel Surface Runout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
Flywheel Housing Runout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293
Backlash Measurement for Power Steering Idler Gear Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .293

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294
Flywheel Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294
Power Steering Idler Shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .294
Crankshaft Flange. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .296
Power Steering Idler Gear Assembly and Crankshaft Rear Oil Seal Carrier. . . . . . . . . . . . . . . . . . . . . . .297
Crankshaft Rear Oil Seal and Wear Sleeve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .298
Flex Plate Flywheel Assembly (Automatic Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300
Flywheel Assembly (Manual Transmission). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .301
Engine Mount Rear Brackets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .302

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .303

278 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 279

Exploded Views

Figure 470 Engine mount rear brackets

1. M12 x 40 bolt (8) 3. Engine mount rear bracket (2)
2. Pipe clip bracket 4. Extension clip
280 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Figure 471 Flywheel assembly (manual transmission)

1. M10 x 55 bolt (10) 2. Reinforcement ring 3. Flywheel assembly
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 281

Figure 472 Flex plate flywheel assembly (automatic transmission)

1. M10 x 55 bolt (10) 3. Flex plate flywheel assembly
2. Reinforcement ring 4. Adapter hub
282 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Figure 473 Crankshaft rear oil seal and crankshaft rear oil seal carrier
1. Rear seal carrier gasket 3. Crankshaft rear oil seal 5. M8 x 55 bolt (2)
2. Crankshaft rear oil seal carrier 4. M8 x 25 bolt (7)
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 283

Figure 474 Crankshaft flange and power steering idler gear assembly
1. Crankshaft flange 3. Power steering idler gear 4. External retaining ring (2)
2. Power steering idler shaft assembly 5. M12 x 68 bolt (6)
284 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Figure 475 Flywheel housing

1. Rear cover (flywheel housing) 3. M10 x 60 bolt (4) 5. M8 x 55 bolt (5)
2. Crankcase rear cover gasket 4. M10 x 70 bolt (2)
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 285

Removal NOTE: See the following service sections for

information on removal of components prior to this
section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Air Compressor and Power Steering Pump
with applicable regulations. Recycle
or dispose of engine fluids, filters, and • Fuel System
other contaminated materials according to • Front Cover, Cooling System, and Related
applicable regulations. components
• Cylinder Heads and Valve Train

WARNING: To prevent personal injury or • Oil Cooler and Filter Housing

death, read all safety instructions in the “Safety
Information” section of this manual. Engine Mount Rear Brackets

WARNING: To prevent personal injury or WARNING: To prevent personal injury or

death, shift transmission to park or neutral, set death, support engine (if in chassis) before
parking brake, and block wheels before doing removing flywheel housing or engine mounts.
diagnostic or service procedures.

WARNING: To prevent personal injury or

death, make sure the engine has cooled before
removing components.

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.
NOTE: If a new (flywheel, flywheel housing or power
steering idler gear) will not be installed, the following
measurements are required before disassembly:
• Flywheel surface runout (page 292)
Figure 476 Engine mount rear bracket (right)
• Flywheel housing runout (page 293)
1. Extension clip
• Power steering idler gear backlash (page 293) 2. M12 x 40 bolt (4)
3. Engine mount rear bracket (right)

1. Remove four M12 x 40 bolts, extension clip, and

right engine mount rear bracket.
286 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

1. Remove and discard two M10 x 55 bolts at

approximately 3 o'clock and 9 o'clock position.
2. Install two guide pins (make locally).
3. Remove and discard remaining eight M10 x 55
bolts.
4. Remove reinforcement ring.

Figure 477 Engine mount rear bracket (left)

1. Pipe clip bracket
2. M12 x 40 bolt (4)
3. Engine mount rear bracket (left)

2. Remove four M12 x 40 bolts, pipe clip bracket,

and left engine mount rear bracket.

Flywheel Assembly (Manual Transmission)

Figure 479 Flywheel assembly removal

5. Slide flywheel assembly off guide pins and out of

flywheel housing.
6. Remove guide pins from crankshaft flange.

Figure 478 Flywheel assembly guide pins

 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 287

Flex Plate flywheel Assembly (Automatic Crankshaft Rear Oil Seal and Wear Sleeve
Transmission)
WARNING: To prevent personal injury or
death, wear safety glasses with side shields when
doing the following procedure.
1. Use an awl or 1/8 inch drill bit to make two small
starter holes 180° apart in crankshaft rear oil seal.

Figure 480 Flex plate flywheel assembly (typical)

1. Reinforcement ring
2. M10 x 55 bolt (10)
3. Adapter hub
4. XMSN-SIDE stamp
Figure 481 Crankshaft rear oil seal removal

1. Remove and discard 10 M10 x 55 bolts.

2. Thread slide hammer (page 303) screw into one
CAUTION: To prevent engine damage, carefully
of the starter holes.
remove and store flywheel adapter or adapter hub.
Damage to sealing surface of the adapter can cause 3. Remove seal evenly, by using a slide hammer on
a rear oil seal leak. one side, and then alternate to other side.
2. Remove reinforcement ring, flex plate flywheel 4. Remove and discard crankshaft rear oil seal from
assembly, and adapter hub. crankshaft rear oil seal carrier.
288 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

5. Install Distorter Ring of Rear Wear Sleeve

Remover (page 303).
NOTE: A socket wrench with an extension should be
used with the Distorter Shaft.
6. Position Distorter Shaft (pointed edge facing
wear sleeve) and insert between wear sleeve and
Distorter Ring until it bottoms out against gear.
7. Slowly turn Distorter Shaft clockwise to apply
force against the wear sleeve.
NOTE: The Distorter Shaft will dent and expand
the wear sleeve at the contact point, without
cutting through the wear sleeve.
8. Repeat steps 6 and 7 three times 120° apart.
9. Remove wear sleeve.
10. Remove Distorter Ring.
Figure 482 Rear Wear Sleeve Remover
1. Distorter Ring
Crankshaft Rear Oil Seal Carrier and Power
2. Distorter Shaft
Steering Idler Gear Assembly

Figure 484 Crankshaft rear oil seal carrier

Figure 483 Rear wear sleeve removal
1. M8 x 25 bolt (7)
1. Wear sleeve 2. Crankshaft rear oil seal carrier
2. Distorter Shaft 3. M8 x 55 bolt (2)
3. Crankshaft flange
4. Distorter Ring
1. Remove seven M8 x 25 bolts and two M8 x 55
bolts from crankshaft rear oil seal carrier.
NOTE: Production engines did not include a wear
2. Remove crankshaft rear oil seal carrier and
sleeve with the crankshaft rear oil seal. A wear sleeve
discard rear seal carrier gasket.
is part of the crankshaft rear oil seal used for service.
If engine being serviced does not have a wear sleeve, NOTE: Check power steering idler gear backlash
skip steps 5-10. (page 293).
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 289

CAUTION: To prevent engine damage, the crankshaft

flange must be properly timed to maintain correct
engine balance.

Figure 485 Power steering idler gear assembly

1. External retaining ring
2. Power steering idler gear assembly Figure 486 Crankshaft flange
1. M12 x 68 bolt (6)
2. Crankshaft flange

WARNING: To prevent personal injury or

death, wear safety glasses with side shields. NOTE: Save crankshaft flange bolts to check flange
face runout.
3. Remove external retaining ring from power
steering idler gear assembly with external snap 2. Remove six M12 x 68 bolts from crankshaft
ring pliers (page 303). flange. Note position of flange before removing.
Flange must be installed in the same location as
4. Remove power steering idler gear assembly.
removed.
CAUTION: To prevent engine damage, do not
Crankshaft Flange damage sealing surface of crankshaft flange.
1. Rotate crankshaft until cylinder 1 is at Top Dead 3. Use a bar type gear puller (page 303) and remove
Center (TDC). crankshaft flange from crankshaft.
290 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Flywheel Housing and Power Steering Idler Shaft

WARNING: To prevent personal injury or

death, support engine (if in chassis) before
removing flywheel housing or engine mounts.

Figure 488 Liquid Gasket (RTV) sealant

(reference)
1. Lower crankcase
2. Upper crankcase
3. RTV sealant (two locations)

NOTE: Steps 3 and 4 are required to prevent pulling

out the crankcase lower seals, when removing the
Figure 487 Flywheel housing mounting bolts flywheel housing.
1. M8 x 55 bolt (5)
2. M10 x 60 bolt (4)
3. M10 x 70 bolt (2)

1. Loosen two M8 x 55 bolts installed in top of

flywheel housing, but do not completely unthread.
2. Remove the remaining nine bolts: three M8 x 55
bolts, four M10 x 60 bolts, and two M10 x 70 bolts.
CAUTION: To prevent engine damage, when
removing flywheel housing, do not pull out crankcase
lower seals between upper and lower crankcase.

Figure 489 Left side of flywheel housing

3. Insert a thin gasket scraper into left side of engine

between flywheel housing and upper and lower
crankcase and push scraper in to cut through
RTV sealant at the joint of the upper and lower
crankcase.
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 291

Figure 490 Right side of flywheel housing

4. Insert a thin gasket scraper into right side of Figure 491 Removal of rear cover gasket and
engine between flywheel housing and upper Liquid Gasket (RTV)
and lower crankcase and push scraper in to cut
through RTV sealant at the joint of the upper and 1. Liquid Gasket (RTV)
lower crankcase. 2. Rear cover gasket

WARNING: To prevent personal injury or

death, get assistance when removing or installing 8. Remove and discard crankcase rear cover
the flywheel housing. gasket.

5. Support the flywheel housing and remove two 9. Remove RTV and clean areas of the flywheel
loosened M8 x 55 bolts. housing.

6. With aid of an assistant, slide flywheel housing off 10. If necessary, use a slide hammer (page 303) to
dowel pins and remove housing. remove power steering idler shaft.

7. Remove RTV and clean areas of the flywheel

housing.
292 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Cleaning, Inspection, and 2. Inspect flywheel for heat checks and extensive
Measurement scoring.
3. Inspect all ring gear teeth for starter pinion
WARNING: To prevent personal injury or damage.
death, wear safety glasses with side shields. 4. Replace flywheel assembly if necessary.
Limit compressed air pressure to 207 kPa (30 psi).
1. Clean foreign material from gasket surfaces
Flywheel Surface Runout
of upper and lower crankcase assemblies and
flywheel housing. Use a scraper or wire brush to CAUTION: To prevent engine damage, check runout
remove sealant from gasket surfaces. of flywheel surface for correct alignment of engine
to transmission. Failure to ensure correct bore
2. Gasket surfaces must be oil-free for good
concentricity and face runout may reduce life of the
adhesion of liquid gasket during assembly. Use
clutch or transmission.
a commercially available, non-caustic brake
cleaner to clean gasket surfaces of upper
and lower crankcase assemblies and flywheel
housing.
3. Wash crankshaft rear oil seal carrier, flywheel
assembly or flex plate flywheel assembly, and
flywheel housing. Dry all with filtered compressed
air.
4. Wash crankcase flange, power steering idler gear
assembly, and power steering idler shaft with a
stiff brush and a nonchlorinated solvent. Dry all
with filtered compressed air.

Flex Plate Flywheel Assembly (Automatic

Transmission) Figure 492 Flywheel surface runout
CAUTION: To prevent engine damage, install a new
flex plate flywheel assembly if damaged. Flex plates 1. Attach dial indicator with magnetic base (page
for automatic transmissions cannot be resurfaced. 303) to the flywheel housing. Place indicator tip
against the flywheel surface between the ring gear
1. Inspect flex plate flywheel assembly for cracks
and outer bolt circle.
around webbing and ring gear weld points.
2. Zero the dial indicator.
2. Inspect all ring gear teeth for starter pinion
damage. NOTE: Keep crankshaft end play at zero and in same
direction for all measurements.
3. Replace flex plate if necessary.
3. Slowly rotate the crankshaft 360 degrees and
observe dial indicator measurements.
Flywheel Assembly (Manual Transmission)
4. Compare the total dial indicator variation (highest
1. Inspect flywheel assembly for cracks around – lowest reading) to flywheel surface maximum
webbing and bolt holes. runout specification (page 303).
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 293

Flywheel Housing Runout Backlash Measurement for Power Steering Idler

Gear Assembly

Figure 493 Flywheel housing runout

Figure 494 Power steering idler gear assembly
backlash (typical)
1. Attach dial indicator with magnetic base (page
303) onto the surface of the flywheel. Place
indicator tip against flywheel housing.
1. Attach dial indicator with magnetic base (page
2. Zero the dial indicator. 303) to flywheel housing.
NOTE: Keep crankshaft end play at zero and in same 2. Place indicator tip against power steering idler
direction for all measurements. gear assembly.
3. Measure at four points 90° apart for total variation. 3. Zero the dial indicator.
Verify readings are within flywheel housing
4. Move power steering idler gear assembly and
maximum runout specification (page 303).
record dial indicator reading. Verify reading
is within specification (page 303). If out of
specification, install a new gear.
294 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Installation 2. Apply clean engine oil to assembly pins.

Flywheel Housing CAUTION: To prevent engine damage, do not allow
Liquid Gasket (RTV) to set longer than 5 minutes
before tightening joint.
3. Apply Liquid Gasket (RTV) (page 303) on gasket
area at points where crankcase and lower
crankcase meet and on top of gasket ends.

WARNING: To prevent personal injury or

death, get help when removing or installing the
flywheel housing.
4. With aid of an assistant, slide flywheel housing
over dowel pins to install housing.

Figure 495 Rear cover gasket

1. Rear cover (flywheel housing)
2. Rear cover gasket

1. Install new crankcase rear cover gasket.

Figure 497 Flywheel housing mounting bolts

1. M8 x 55 bolt (5)
2. M10 x 60 bolt (4)
3. M10 x 70 bolt (2)

5. Install 11 flywheel housing bolts in the correct

location, as shown. Tighten bolts to standard
torque (page 383) for specific bolt size.

Power Steering Idler Shaft

Figure 496 Liquid Gasket (RTV) and assembly
pins NOTE: Skip this subsection, if the power steering idler
shaft was not removed.
1. Liquid Gasket (RTV)
2. Rear cover gasket
WARNING: To prevent personal injury or
3. Assembly pin (2)
death, wear safety glasses with side shields.
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 295

Figure 500 Power steering idler shaft installation

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.

Figure 498 External retaining ring on power CAUTION: To prevent engine damage, do not allow
steering idler shaft external retaining ring to contact the flywheel housing.
Contact can distort external retaining ring, affecting its
function as a gear thrust surface.
1. Place external retaining ring on end of power 3. Align power steering idler shaft in flywheel
steering idler shaft without threaded hole. housing at correct location. Using Power Steering
Idler Shaft Installation Tool , drive power steering
idler shaft into bore in transmission side of
flywheel housing, until power steering idler shaft
installation tool bottoms out.

Figure 499 Power steering idler shaft and

external retaining ring in Power Steering Idler
Shaft Installation Tool

2. Put threaded hole end of power steering idler shaft

into Power Steering Idler Shaft Installation Tool
(page 303) to set correct shaft height (page 303).
296 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

5. Measure power steering idler shaft height, using a

dial caliper (page 303). Power steering idler shaft
height should match specification (page 303).

Crankshaft Flange

Figure 501 Power steering idler shaft installation

height Figure 503 Crankshaft flange
1. Retaining external ring 1. M12 x 68 bolt (6)
2. Power steering idler shaft 2. Crankshaft flange
3. Flywheel housing

CAUTION: To prevent engine damage, the crankshaft

4. If installation tool is not available, use a brass flange must be properly timed to maintain correct
drift to install power steering idler shaft into the engine balance.
flywheel housing, to correct height. 1. Rotate crankshaft until cylinder number 1 is at Top
Dead Center (TDC).
2. Inspect the crankshaft gear and crankshaft flange
mating surfaces. Make sure they are free of
debris, nicks, and dirt.
3. Install two guide pins (made locally) into
crankshaft gear bolt holes, 180° from each other.
NOTE: Make sure dowel pin is installed correctly in
crankshaft flange.

WARNING: To prevent serious personal

injury or death, wear heat protective gloves when
installing hot crankshaft flange.
4. Heat crankshaft flange to maximum 177 °C (350
°F).
Figure 502 Power steering idler shaft height CAUTION: To prevent engine damage, do not
measurement damage sealing surface of crankshaft flange.
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 297

5. Using a heat insulated glove, install crankshaft c. Rotate bolts an additional 90 degrees using
flange over guide pins and onto crankshaft, with above sequence.
dowel pin pointing at 12 o'clock position.
6. Remove guide pins and install six old M12 x 68
Power Steering Idler Gear Assembly and
bolts. Tighten bolts alternately to seat crankshaft
Crankshaft Rear Oil Seal Carrier
flange.
CAUTION: To prevent engine damage, install gear
7. Check face runout of crankshaft flange, using dial
with circular witness groove facing out.
indicator with magnetic base (page 303). If face
runout exceeds specification (page 303), remove 1. With circular witness grove facing out, install
and reinstall crankshaft flange to ensure there is power steering idler gear assembly on power
no trapped debris and crankshaft flange is seated steering idler shaft.
against gear. If after reinstallation of crankshaft
2. Verify correct gear orientation and gear tooth
flange the face runout still exceeds specification,
engagement.
install new crankshaft flange.

Figure 505 Power steering idler gear assembly

1. External retaining ring
Figure 504 Crankshaft flange torque sequence
2. Power steering idler gear assembly

CAUTION: To prevent engine damage, always install

new crankshaft flange mounting bolts. WARNING: To prevent personal injury or
8. Remove and discard six old bolts. Lubricate death, wear safety glasses with side shields.
underside of bolt heads on six new M12 x 68 bolts 3. Install external retaining ring onto power steering
with clean engine oil and install bolts loosely. idler shaft for power steering idler gear assembly.
Tighten bolts as follows using above sequence:
4. Do Backlash Test for Power Steering Idler Gear
a. Tighten bolts to 41 N·m (30 lbf·ft) using above Assembly (page 293).
sequence.
5. Install new rear seal carrier gasket on crankshaft
b. Rotate bolts 90 degrees using above rear oil seal carrier.
sequence.
298 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Figure 506 Crankshaft rear oil seal carrier

1. M8 x 25 bolt (7) Figure 507 Application of hydraulic sealant
2. Crankshaft rear oil seal carrier
3. M8 x 55 bolt (2)
2. Apply a 360° bead of Loctite® 569 Hydraulic
Sealant (page 303) on rear edge of crankshaft
6. Install crankshaft rear oil seal carrier on flywheel flange.
housing.
7. Install two M8 x 55 bolts in lower holes of
crankshaft rear oil seal carrier finger tight.
8. Install seven M8 x 25 bolts in crankshaft rear oil
seal carrier finger tight.
9. Tighten two M8 x 55 and seven M8 x 25 bolts to
standard torque (page 383).

Crankshaft Rear Oil Seal and Wear Sleeve

NOTE: When replacing crankshaft rear oil seal, note
that production engines will not have a wear sleeve.
Wear sleeves are only available as a service item
included with replacement crankshaft rear oil seal.
Figure 508 Crankshaft Rear Seal / Wear Sleeve
WARNING: To prevent personal injury or Installer (base)
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
3. Align base of Crankshaft Rear Seal / Wear Sleeve
1. Clean crankshaft flange with a suitable solvent Installer (page 303) with alignment dowel on
and dry flange with filtered compressed air. crankshaft flange and install base.
CAUTION: To prevent engine damage, do not
separate wear sleeve from new crankshaft rear oil
seal; this will damage seal.
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 299

Figure 510 Installation of Crankshaft rear oil

seal and wear sleeve assembly
1. Crankshaft rear oil seal and wear sleeve assembly
2. Rear Oil Seal Installer (base)
Figure 509 Crankshaft rear oil seal and wear
3. Crankshaft flange
sleeve assembly
1. Dust seal lip
2. Wear sleeve 4. Position new (soap and water lubricated)
crankshaft rear oil seal and wear sleeve assembly
onto hub of Crankshaft Rear Seal / Wear Sleeve
NOTE: Before assembly, lubricate outer diameter of Installer (page 303).
crankshaft rear oil seal with a solution of dish soap and
water (approximately 50/50 mix). Do not use other
lubricants.
300 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

Flex Plate Flywheel Assembly (Automatic

Transmission)

Figure 511 Installation of Crankshaft rear oil

seal and wear sleeve assembly
1. Rear Seal Installer w/ 40 mm Cap Screws (forcing
Figure 512 Flex plate flywheel assembly
collar)
2. Crankshaft Rear Seal / Wear sleeve Installer 1. Reinforcement ring
3. Thrust bearing 2. M10 x 55 bolt (10)
4. Drive nut 3. Adapter hub
4. XMSN-SIDE stamp

5. Put forcing collar (page 303), thrust bearing, and

drive nut on threaded shaft. 1. Position flex plate flywheel assembly on adapter
hub and align hub over crankshaft flange
CAUTION: To prevent engine damage, do not use
dowel. Make sure XMSN-SIDE stamp is facing
an impact wrench to tighten drive nut.
transmission.
6. Tighten drive nut until the forcing collar bottoms
CAUTION: To prevent engine damage, always install
out on Crankshaft Rear Seal / Wear Sleeve
new flywheel assembly or flex plate flywheel assembly
Installer (base). Rear oil sleeve and wear sleeve
mounting bolts.
assembly will be placed at correct depth.
CAUTION: To prevent engine damage, do not use
anti-seize compounds or grease on new flywheel
assembly or flex plate flywheel assembly mounting
bolts.
NOTE: Make sure lip on outer circumference of
reinforcement ring faces transmission and align bolt
holes to position reinforcement ring.
2. Install two new M10 x 55 bolts 180° apart through
reinforcement ring, flex plate flywheel assembly,
and adapter hub. Hand tighten two bolts to hold
assembly.
3. Install eight remaining new M10 x 55 bolts.
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 301

Flywheel Assembly (Manual Transmission)

Figure 513 Torque sequence for flex plate

flywheel assembly bolts and dowel location

Figure 514 Flywheel assembly installation

NOTE: New phosphate coated bolts do not require oil (typical)
before torquing.
4. Snug all bolts in sequence shown (Figure 513) to
initial torque of 4 N·m (35 lbf·in). WARNING: To prevent personal injury or
5. Tighten all bolts in sequence shown (Figure 513) death, inspect flywheel assembly for cracks or
to final torque of 94 N·m (69 lbf·ft). heat checks after resurfacing. Do not install
flywheel assembly if damaged or questionable.
Flywheel resurfacing information is provided for
guidance only. Navistar, Inc. does not assume
responsibility for work done by service personnel.
1. Install two guide pins (made locally) in crankshaft
flange at approximately 3 o'clock and 9 o'clock.
2. Align dowel hole in flywheel with crankshaft flange
dowel and slide flywheel assembly onto guide
pins.
3. Align reinforcement ring with dowel and slide over
guide pins. Make sure lip on outer circumference
of ring faces transmission.
302 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING

CAUTION: To prevent engine damage, always install Engine Mount Rear Brackets
new flywheel assembly or flex plate flywheel assembly
mounting bolts.
CAUTION: To prevent engine damage, do not use
anti-seize compounds or grease on new flywheel
assembly or flex plate flywheel assembly mounting
bolts.
4. Install two new M10 x 55 bolts 180° from
each other to secure flywheel assembly to the
crankshaft flange. Remove both guide pins.
5. Install eight remaining new M10 x 55 bolts.

Figure 516 Engine mount rear bracket (left)

1. Pipe clip bracket
2. M12 x 40 bolt (4)
3. Engine mount rear bracket (left)

1. Install left engine mount rear bracket, pipe clip

bracket, and four M12 x 40 bolts. Tighten bolts
to standard torque (page 383).

Figure 515 Torque sequence for flywheel

assembly bolts and dowel location

NOTE: New phosphate coated bolts do not require oil

before torquing.
6. Snug all bolts in sequence shown (Figure 515) to
initial torque of 4 N·m (35 lbf·in).
7. Tighten all bolts in sequence shown (Figure 515)
Figure 517 Engine mount rear bracket (right)
to final torque of 94 N·m (69 lbf·ft).
1. Extension clip
8. Measure Flywheel Surface Runout. (page 292).
2. M12 x 40 bolt (4)
9. Measure Flywheel housing runout (page 293) 3. Engine mount rear bracket (right)

2. Install right engine mount rear bracket, extension

clip, and four M12 x 40 bolts. Tighten bolts to
standard torque (page 383).
 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING 303

Specifications
Flywheel Assembly and Flywheel Housing
Flywheel Assembly
Flywheel surface maximum runout (manual) 0.25 mm (0.010 in)
Power Steering Idler Shaft
Power steering idler shaft installation height 34.30 ± 0.25 mm (1.35 ± 0.01 in)
Flywheel Housing
Flywheel housing maximum runout 0.51 mm (0.020 in)
Crankshaft Flange and Power Steering Idler Gear Assembly
Face runout:
Crankshaft flange 0.050 mm (0.002 in) maximum
Backlash:
Power steering idler gear assembly 0.066 to 0.290 mm (0.0026 to 0.0114 in)

Special Torque

Crankshaft flange bolts, M12 x 68 See tightening steps in procedure.

Flex plate flywheel assembly bolts, M10 x 55 See tightening steps in procedure.
Flywheel assembly bolts, M10 x 55 See tightening steps in procedure.

Special Service Tools

Description Tool Number

Dial caliper Obtain locally
Dial indicator with magnetic base Obtain locally
External snap ring pliers Obtain locally
Gear puller (bar type) Obtain locally
Liquid Gasket (RTV) (6 oz. tube) 1830858C1
Loctite® 569 hydraulic sealant or equivalent Obtain locally
Power Steering Idler Shaft Installation Tool ZTSE4719
Crankshaft Rear Seal / Wear Sleeve installer (base) ZTSE4515-B
Rear Seal Installer w/ 40 mm Cap Screws (forcing collar) ZTSE4515-2C
Rear Wear Sleeve Remover (Distorter Ring and Distorter Shaft) ZTSE4889
Slide hammer Obtain locally
Heat insulated glove Obtain locally
304 FLYWHEEL ASSEMBLY AND FLYWHEEL HOUSING
 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE 305

Table of Contents

Exploded Views. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .308
Lower Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .309
Oil Pickup Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310
Upper Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310

Cleaning and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310

Lower Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310
Oil Pickup Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310
Upper Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
Upper Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
Oil Pickup Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
Lower Oil Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .312

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .313

306 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE
 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE 307

Exploded Views

Figure 518 Lower oil pan

1. M6 x 16 bolt (12) 3. Oil pan drain plug 5. Drain plug gasket
2. M6 x 16 stud bolt (3) 4. M6 x 25 bolt (5) 6. Lower oil pan
308 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE

Figure 519 Oil pickup tube and upper oil pan

1. M6 x 25 bolt (9) 4. Oil pickup tube O-ring 7. Upper oil pan gasket
2. Oil pickup tube 5. Lower oil pan gasket
3. M6 x 16 bolt (3) 6. Upper oil pan

Removal WARNING: To prevent personal injury or

death, read all safety instructions in the “Safety
Information” section of this manual.
GOVERNMENT REGULATION: Engine
fluids (oil, fuel, and coolant) may be a hazard WARNING: To prevent personal injury or
to human health and the environment. death, shift transmission to park or neutral, set
Handle all fluids and other contaminated parking brake, and block wheels before doing
materials (e.g. filters, rags) in accordance diagnostic or service procedures.
with applicable regulations. Recycle
or dispose of engine fluids, filters, and WARNING: To prevent personal injury or
other contaminated materials according to death, make sure the engine has cooled before
applicable regulations. removing components.
 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE 309

2. Remove M6 nut and harness bracket.

WARNING: To prevent personal injury or
death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.
NOTE: See the following service sections for
information on removal of components prior to this
section.
• Engine Electrical
• Air Compressor and Power Steering/Fuel Pump
Lower Oil Pan

Figure 521 Lower oil pan and oil pan drain plug
1. M6 x 16 bolt (12)
2. M6 x 16 stud bolt (3)
3. Oil pan drain plug
4. M6 x 25 bolt (5)
5. Lower oil pan

WARNING: To prevent personal injury or

death, dispose of oil or discard components,
according to applicable regulations.
Figure 520 Harness bracket mounting
3. Remove oil pan drain plug and drain oil into a
1. Harness bracket suitable container.
2. Upper oil pan
3. M6 nut
4. Remove three M6 x 16 stud bolts.
4. Lower oil pan 5. Remove five M6 x 25 bolts.
5. M8 stud bolt
6. Remove 12 M6 x 16 bolts and lower oil pan.

1. Remove M8 stud bolt.

310 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE

Oil Pickup Tube Upper Oil Pan

Figure 522 Oil pickup tube Figure 524 Upper oil pan
1. M6 X 16 bolt (3) 1. Lower oil pan gasket
2. Oil pickup tube 2. M6 X 25 bolt (9)
3. Upper oil pan

1. Remove three M6 x 16 bolts and oil pickup tube.

1. Remove nine M6 X 25 bolts and upper oil pan.
2. Remove and discard upper oil pan gasket.
3. Remove and discard lower oil pan gasket.

Cleaning and Inspection

Lower Oil Pan
1. Inspect bottom of lower oil pan for metallic debris
or other evidence of engine damage. Investigate
any abnormalities as required.
2. Clean lower oil pan with a nonchlorinated solvent.

Figure 523 Oil pickup tube O-ring WARNING: To prevent personal injury or
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Remove and discard oil pickup tube O-ring. 3. Dry with filtered compressed air.
4. Look for warping, dents, and cracking. Replace
the lower oil pan if necessary.

Oil Pickup Tube

1. Clean oil pickup tube in a nonchlorinated solvent.
 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE 311

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Dry with filtered compressed air.
3. Inspect oil pickup tube and bracket for cracking.
Replace if necessary.

Upper Oil Pan

1. Clean upper oil pan in a nonchlorinated solvent.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Figure 526 Upper oil pan
Limit compressed air pressure to 207 kPa (30 psi).
1. Lower oil pan gasket
2. Dry with filtered compressed air.
2. M6 X 25 bolt (9)
3. Inspect for warping or cracking. Replace upper oil 3. Upper oil pan
pan if necessary.

2. Install upper oil pan and nine M6 x 25 bolts.

Tighten bolts to standard torque (page 383).
Installation 3. Install a new lower oil pan gasket.
Upper Oil Pan

Oil Pickup Tube

Figure 525 Upper oil pan gasket

Figure 527 Oil pickup tube O-ring

1. Install a new upper oil pan gasket.

1. Install a new oil pickup tube O-ring. Lubricate

O-ring with clean engine oil.
312 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE

Lower Oil Pan

Figure 528 Oil pickup tube

1. M6 X 16 bolt (3) Figure 529 Lower oil pan and oil pan drain plug
2. Oil pickup tube
1. M6 x 16 bolt (12)
2. M6 x 16 stud bolt (3)
2. Install oil pickup tube and three M6 x 16 bolts. Do 3. Oil pan drain plug
not tighten at this time. 4. M6 x 25 bolt (5)
5. Lower oil pan
3. Tighten two M6 x 16 bolts on oil pickup tube flange
to standard torque (page 383).
4. Tighten M6 x 16 bolt on oil pickup tube bracket to 1. Position lower oil pan on upper oil pan mating
standard torque (page 383). surface.
2. Install 12 M6 x 16 bolts.
3. Install five M6 x 25 bolts.
4. Install three M6 x 16 stud bolts.
5. Tighten lower oil pan bolts and stud bolts to
special torque (page 313).
6. Install oil pan drain plug with new O-ring, and
tighten to special torque (page 313).
 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE 313

Figure 530 Harness bracket mounting

1. Harness bracket
2. Upper oil pan
3. M6 nut
4. Lower oil pan
5. M8 stud bolt

7. Position harness bracket and install M8 stud bolt.

Tighten stud bolt to standard torque (page 383).
8. Install M6 harness bracket nut. Tighten nut to
standard torque (page 383).

Special Torque
Table 28 Lower Oil Pan
Oil pan drain plug 25 N·m (18 lbf·ft)
Lower oil pan bolts and stud bolts 13 N·m (115 lbf·in)
314 LOWER OIL PAN, UPPER OIL PAN, AND OIL PICKUP TUBE
 POWER CYLINDERS 315

Table of Contents

Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318
Preliminary Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .318
Connecting Rod and Piston Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .319
Piston Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .321

Cleaning and Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .322

Pistons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .322
Piston Rings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324
Connecting Rods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324
Connecting Rod Bore Out-of-round Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .324
Connecting Rod Bearing Fit Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .325
Piston Pin Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .326

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327
Piston Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327
Connecting Rod and Piston Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .328

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .331

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .332

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .332

316 POWER CYLINDERS
 POWER CYLINDERS 317

Exploded View

Figure 531 Power cylinder and components

1. Top compression ring (8) 4. Piston (8) 7. Connecting rod bearing (16)
2. Intermediate ring (8) 5. Piston pin (8) 8. Connecting rod and cap (8)
3. Oil control ring (8) 6. Piston pin retainer ring (16) 9. Connecting rod bolt (16)
318 POWER CYLINDERS

Removal NOTE: See the following service sections for

information on removal of components prior to this
section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Air Compressor and Power Steering/Fuel Pump
with applicable regulations. Recycle
or dispose of engine fluids, filters, and • Fuel System
other contaminated materials according to • Intake and Exhaust Manifolds
applicable regulations.
• Front Cover, Cooling System, and Related
Components

WARNING: To prevent personal injury or • Cylinder Head and Valve Train

death, read all safety instructions in the “Safety • Oil Cooler and Filter Housing
Information” section of this manual.
• Flywheel and Flywheel Housing
WARNING: To prevent personal injury or • Lower Oil Pan, Upper Oil Pan and Oil Pickup Tube
death, shift transmission to park or neutral, set
Preliminary Checks
parking brake, and block wheels before doing
diagnostic or service procedures. NOTE: Evaluate piston protrusion before removing
any piston and connecting rod assemblies. This will
help identify bent or twisted connecting rods.
WARNING: To prevent personal injury or
death, make sure engine has cooled before
removing components.

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

Figure 532 Checking piston protrusion

NOTE: Before checking piston protrusion, make sure

upper crankcase assembly deck surface is flat and
level. See Crankcase Inspection (page 342).
NOTE: Piston protrusion readings are done at 3 and
9 o'clock positions. These positions are in line with
piston pin, eliminating rocking movement of piston at
any other position of measurement.
 POWER CYLINDERS 319

1. Check piston protrusion above upper crankcase 2. Use a feeler gauge (page 332) to check
assembly as follows: connecting rod side clearance as follows:
a. Zero dial indicator with magnetic base (page a. Pry apart a pair of connecting rods on a
332) on upper crankcase assembly deck crankshaft rod journal. Insert largest possible
surface. feeler gauge between connecting rods to
check side clearance.
b. Position dial indicator tip over piston head at
3 o'clock position. b. Repeat for each pair of connecting rods on
each crankshaft rod journal and compare with
c. Rotate crankshaft in direction of normal
specification .
rotation to raise piston to its maximum
outward protrusion at cylinder Top Dead NOTE: Lack of clearance could indicate a
Center (TDC). Read this maximum protrusion damaged connecting rod or a connecting rod
on dial indicator. bearing out of position. Excessive clearance
may require replacement of connecting rods
d. Reposition dial indicator tip on piston head at
or crankshaft assembly. Correct as required.
9 o'clock position.
Connecting Rod and Piston Assembly
e. Rotate crankshaft to raise the piston to
its maximum protrusion. Read maximum CAUTION: To prevent engine damage, check for a
protrusion on dial indicator. carbon ridge on top of cylinder bores. If found, remove
carbon ridge with a razor knife, before removing rod
f. Average the two readings. Replace piston
and piston assemblies.
and connecting rod if protrusion is outside
specifications . 1. Scrape carbon ridge from top of cylinder bore, if
necessary. Use care not to damage cylinder bore
surface.
CAUTION: To prevent engine damage, stamp, mark,
or tag each connecting rod and cap with the correct
cylinder number.

This engine has fractured connecting rods. Do not

alter or damage fractured mating surfaces of the
rod and cap. A cap from one connecting rod is not
interchangeable with another connecting rod. The
matching connecting rod and cap numbers or symbols
indicate a matched set.
CAUTION: To prevent engine damage, use
permanent markers to identify internal components
or their orientation. Do not use paint or temporary
Figure 533 Side clearance check for connecting markers.
rod and cap 2. Rotate crankshaft to position journals for removal
1. Feeler gauge of connecting rod assemblies. Mark connecting
2. Connecting rod and cap rod locations.
320 POWER CYLINDERS

Figure 534 Connecting rod cap bolts Figure 535 Cap and rod numbers
1. Connecting rod cap (8) 1. Matching numbers or symbols
2. Connecting rod bolt (16)

CAUTION: To prevent engine damage, keep the

3. Loosen two connecting rod bolts and remove
fractured mating surfaces of the connecting rod and
connecting rod cap.
cap clean and free of lint and debris. Do not allow
CAUTION: To prevent engine damage, do not alter the mating surfaces to rest on other surfaces. Do not
or deface the fractured mating surfaces of connecting bump the mating surfaces or drop the connecting rod
rod and cap. Do not reverse the connecting rod cap or cap. This could chip or mar the mating surfaces,
location. causing incorrect mating of rod and cap.
CAUTION: To prevent engine damage, do not push CAUTION: To prevent engine damage, assemble
on fractured surface of connecting rod. connecting rod cap and connecting rod with their
fractured mating surfaces in the original orientation.
4. Remove piston and connecting rod assemblies
Matching numbers must be next to each other.
from upper crankcase assembly as follows:
5. When removed, make sure matching connecting
a. Rotate engine to a vertical position.
rod and connecting rod cap numbers stay
b. Use a wooden or plastic handle and push together as a set. A cap from one connecting rod
piston and connecting rod assembly from is not interchangeable with any other connecting
cylinder bore. rod.
c. Once piston rings are free of cylinder bore, 6. Check the crankpin fillets for damage. If crankpin
remove piston and connecting rod assembly fillets are damaged, replace crankshaft assembly.
from upper crankcase assembly. See Crankshaft Assembly (page 338).
 POWER CYLINDERS 321

Piston Disassembly NOTE: Only expand piston rings enough to fit over top
of piston.
WARNING: To prevent personal injury or NOTE: Keep piston rings organized for each cylinder.
death, wear safety glasses with side shields when
1. Use piston ring expansion pliers (page 332) to
removing piston pin retaining rings.
remove top compression ring, intermediate ring,
CAUTION: To prevent engine damage, mark pistons and oil control ring.
with cylinder number from which each was removed.
If pistons will be reused, reinstall in correct cylinder
bore.
CAUTION: To prevent engine damage, do not stamp
marks on any machined surface of piston. If piston
must be marked with a stamp, place mark on a
non-machined as-cast surface only.
CAUTION: To prevent engine damage, use
permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.

Figure 537 Piston pin retainer ring

2. Use a small pick to remove both piston pin retainer

rings.
CAUTION: To prevent engine damage, do not mark
piston pin for cylinder and location on outer diameter;
place mark only on flat end or tapered inside surface.
3. Remove piston pin from its bore by hand, and
separate connecting rod from piston.

Figure 536 Piston ring removal

1. Piston ring expansion pliers
2. Piston
3. Piston ring (top compression ring shown)
322 POWER CYLINDERS

Cleaning and Inspection

CAUTION: To prevent engine damage, do not use
caustic solvents, wire brushes or bead blasting media
to clean aluminum pistons.
CAUTION: To prevent engine damage, do not use
solvents or a wire brush to clean the fractured mating
surface of connecting rods.
1. Use a soap and water solution to clean aluminum
pistons. Soak piston first, and then clean with a
non-metallic brush.
2. Clean piston ring grooves thoroughly.
3. The following disassembled components may be
cleaned using a nonchlorinated solvent:
Figure 538 Top compression ring groove
• Piston pins
1. Piston gauge pins (2.0828 mm [0.082 in])
• Piston pin retainer rings
• Connecting rods
3. Install Piston Gauge Pins (2.0828 mm [0.082 in])
4. Thoroughly clean connecting rod bolt holes and (page 332) in top compression ring groove. Piston
threads. Gauge Pins must be parallel.
4. Use a 3 - 4 inch micrometer (page 332) to
Pistons measure diameter over piston gauge pins.

1. Inspect pistons for scuffed or scored skirts, 5. If measurement over gauge pin is not within
cracked or worn ring lands, and cracked or specifications , excessive piston groove wear
scuffed pin bores. Replace damaged pistons. exists. Replace piston.

NOTE: Top compression ring groove is a keystone

design which requires measurement over gauge pins
to determine ring groove wear.
2. Check top compression ring groove for wear.

Figure 539 Second and third ring groove

clearance check (intermediate ring shown)
1. Intermediate ring groove
2. Feeler gauge
 POWER CYLINDERS 323

6. Check side clearance of intermediate ring groove 9. If not within specification , cylinder boring may be
as follows: required. Bore reconditioning requires oversize
service pistons. Verify piston size by measuring
a. Place outer edge of new ring in its respective
skirt diameter under conditions indicated in
ring groove.
specifications .
b. Roll ring entirely around piston in its
NOTE: In addition to standard size service piston, the
respective groove. Make sure ring is able to
following oversize pistons are available.
move freely in its groove.
• 0.254 mm (0.010 in)
c. Use a feeler gauge (page 332) to check
side clearance of each ring in its respective • 0.508 mm (0.020 in)
groove . Excessive side clearance indicates
• 0.762 mm (0.030 in)
ring groove wear and requires piston
replacement. 10. If cylinder walls have minor surface damage, but
are otherwise within specification (out-of-round),
7. Check side clearance of oil control ring groove as
it may be possible to remove such damage by
follows:
honing. If cylinder bore is suitable for use without
a. Place outer edge of new ring in oil control ring reconditioning, deglaze bore using a glaze
groove. breaker brush (page 332), then reassemble.
b. Roll ring entirely around piston in its NOTE: See Cylinder Deglazing (page 343) for correct
respective groove. Make sure ring moves procedure.
freely in groove.
c. Use a feeler gauge (page 332) to check
side clearance of oil control ring in its
respective groove . Excessive side clearance
indicates ring groove wear and requires
piston replacement.

Figure 541 Piston skirt clearance check in

cylinder bore
1. Piston
2. Feeler gauge
3. Crankcase

Figure 540 Piston skirt diameter

11. Check piston skirt clearance in cylinder bore .
1. Piston skirt
Correct as required.
2. 3 - 4 inch micrometer

8. When considering piston replacement, check

cylinder bore out-of-round specifications. See
Crankcase Inspection (page 342).
324 POWER CYLINDERS

Piston Rings Connecting Rods

CAUTION: To prevent engine damage, install new CAUTION: To prevent engine damage, keep the
piston rings if a piston is removed. Faulty piston rings fractured mating surfaces of the connecting rod and
cannot always be detected visually. cap clean and free of lint and debris. Do not allow
the mating surfaces to rest on other surfaces. Do not
1. Inspect new piston rings for cleanliness.
bump the mating surfaces or drop the connecting rod
2. Before installing new piston rings, check gap for or cap. This could chip or mar the mating surfaces,
each ring as follows: causing incorrect mating of rod and cap.
a. Push piston ring down into cylinder bore. CAUTION: To prevent engine damage, do not use
Make sure the piston ring is square with solvents or a wire brush to clean the fractured mating
cylinder wall. An inverted piston head can be surface of connecting rods.
used to push piston ring to desired location of
1. Inspect connecting rod bolt threads for nicks or
measurement (usually at top of piston stroke).
damage. Replace as required.
b. Use a feeler gauge (page 332) to measure
2. Inspect connecting rod and cap mating surfaces
gap between ends of each piston ring.
and bearing bore for any indication of damage.
Bore must be smooth and free of scoring or nicks.
Replace connecting rod if necessary.

Figure 543 Inside diameter of piston pin bore

Figure 542 Piston ring end gap clearance in
cylinder bore 1. Piston pin bore
2. Telescoping gauge
1. Piston ring
2. Feeler gauge
3. Inspect connecting rod piston pin bore for wear as
follows:
c. If gap does not meet specifications , select
another ring or recheck cylinder bore wear. a. Use a telescoping gauge (page 332) and a
1-2 inch micrometer (page 332) to measure
piston pin bore at two locations 90° apart.
b. If inside diameter of piston pin bore exceeds
specification , replace connecting rod.

Connecting Rod Bore Out-of-round Check

CAUTION: To prevent engine damage, do not use air
powered tools to install connecting rod bolts; this can
seize rod bolts.
 POWER CYLINDERS 325

1. Lubricate connecting rod bolts with clean engine Connecting Rod Bearing Fit Check
oil. Assemble cap to rod without bearing insert.
NOTE: Bearing shells must fit tightly in the bore.
Tighten bolts to initial and final torque values
When bearing shells are inserted into connecting
(page 332).
rod and cap, they protrude above parting line. This
protrusion is required to achieve bearing crush.

Bearing shells across open ends are slightly larger

than the diameter of connecting rod bore into which
they are assembled. This condition is designed into
bearing shell, causing it to spread outward at parting
line when bearing crush load is applied by tightening
bolts. Some flexibility may be lost in normal use,
but bearing replacement is not required because of a
nominal loss of flexibility.

When assembly is drawn up tight, bearing is

compressed, ensuring positive contact between
backside of bearing and bore.
1. Lubricate connecting rod bolts with clean engine
Figure 544 Measurement for out-of-round of oil. Assemble cap to connecting rod with new
connecting rod bearing shells installed. Tighten bolts to initial and
final torque values (page 332).
2. Using a telescoping gauge (page 332), measure
2. Using a telescoping gauge (page 332), measure inside diameter of connecting rod bearing at
connecting rod bearing bore at two locations, 90° two locations 90° apart. Average the two inside
apart. diameters.
3. If the difference between dimension A and B 3. Use a 2–3 inch micrometer (page 332) to measure
exceeds out-of-round specifications , replace each crankshaft rod journal diameter.
connecting rod.
4. Subtract crankshaft rod journal diameter from
4. With connecting rod cap removed, inspect surface respective connecting rod bearing inside diameter
finish of connecting rod bearing bore. Bore must to obtain connecting rod bearing running
be smooth and free of scoring, nicks or burrs. clearance. Repeat for each crankshaft rod
Replace as required. journal.
CAUTION: To prevent engine damage, do not rework
bearings or bearing caps to reduce journal-to-bearing
running clearances. Grind or install new crankshaft.
NOTE: Plastigage® may be used as an alternate
method, to determine running clearance.
5. If connecting rod bearing running clearances
exceed specifications because of wear on
crankshaft, replace or grind crankshaft and install
under-size precision type bearing shells.
326 POWER CYLINDERS

Piston Pin Inspection

NOTE: Some wear of the piston pin coating should
be considered normal. If there is evidence of material
transfer on the piston pin, replace the piston pin,
connecting rod, and piston.
1. Inspect piston pins for corrosion or wear. Replace
as required.

Figure 546 Inside diameter measurement of

piston pin bore

4. Using a telescoping gauge (page 332) and 1–2

inch micrometer (page 332), measure each piston
pin bore inside diameter, at two locations 90°
apart.
5. To check piston pin clearance, subtract outside
Figure 545 Piston pin wear
diameter of piston pin from inside diameter
of piston pin bore. If clearance exceeds
specifications , replace piston pin and check
2. Use a 1-2 inch micrometer (page 332), measure
piston pin clearance using new piston pin.
piston pin outside diameter at two locations 90°
apart.
3. Measure each end of the pin. If piston pin wear
exceeds specifications , replace piston pin.
 POWER CYLINDERS 327

Installation
Piston Assembly

WARNING: To prevent personal injury or

death, wear safety glasses with side shields when
doing the following procedure.

Figure 548 Piston pin retainer ring

d. Using a suitable tool, install piston pin retainer

ring at one end of piston pin bore.
e. Slide piston pin through bored holes, stopping
at installed piston pin retainer ring.
Figure 547 Correct position of installed f. Use a suitable tool to install second piston pin
connecting rod retainer ring.
1. Longer leg of connecting rod (cam side) g. Check the piston pin end clearance .
2. CAM SIDE stamp on cam side of piston crown

1. Connect piston to connecting rod as follows:

a. Lubricate connecting rod piston pin bore,
piston pin bore, and piston pin with clean
engine oil.
b. Position the longer leg of the connecting rod
with the side of the piston showing the CAM
SIDE stamped in its crown.
c. Place connecting rod into piston.

Figure 549 Piston rings installed

1. Piston ring expansion pliers
2. Piston
3. Piston ring (top compression ring shown)
328 POWER CYLINDERS

CAUTION: To prevent engine damage, install piston 3. Space ring gaps approximately 120° apart after
rings correctly. Both intermediate and compression ring installation.
rings have the same identification markings. The
marking must face up for the ring to be installed
correctly. The intermediate ring has a rectangular Connecting Rod and Piston Assembly
cross section and goes in the middle groove. The top 1. Turn crankshaft so number 1 crank pin is at
compression ring has a keystone cross section and bottom of its stroke.
goes in the top groove.
NOTE: Only expand piston rings enough to fit over top
of piston.
2. Use piston ring expansion pliers (page 332) to
install piston rings.
a. Install expansion spring component of two
piece oil control ring into bottom piston
groove.
b. Install oil scraper component of two piece oil
control ring over expansion spring with the
gap 180° from the spring wire latch.

Figure 551 Piston and piston ring lubrication

2. Lightly coat piston and piston rings with clean

engine oil.

Figure 550 Piston ring identification mark (top

compression ring)
1. Identification mark

c. Install intermediate ring into middle piston

groove. Make sure ring is installed with Figure 552 Cylinder wall lubrication
identification mark facing up.
d. Install top compression ring into top piston 3. Coat cylinder walls, crankshaft journals, and
groove. Make sure ring is installed with Piston Ring Compressor (page 332) with clean
identification mark facing up. engine oil.
 POWER CYLINDERS 329

CAUTION: To prevent engine damage, CAM SIDE

stamped on top of piston must face camshaft side of
crankcase.
CAUTION: To prevent engine damage, do not
damage piston cooling tube when installing
connecting rod and piston assembly. If tube is bent
during piston assembly installation, replace tube.
NOTE: Before installing piston and connecting rod
assembly, make sure all piston cooling tubes are
installed.
6. Carefully put piston and piston cope combination
and connecting rod assembly in cylinder bore.

Figure 553 Piston installed in piston ring

compressor

4. Place piston in Piston Ring Compressor (page

332).
5. Install bearing shells in connecting rod and cap.
Coat bearing shell in connecting rod with clean
engine oil.

Figure 555 Installation of piston in cylinder bore

7. Once piston and connecting rod assembly have

been inserted in cylinder bore, use a handle
(wood or plastic) of a hammer to tap piston into
crankcase bore. Guide connecting rod in place
on crankshaft.
CAUTION: To prevent engine damage, lightly
lubricate bolt threads and mating surfaces of bolt
flanges with clean engine oil. Too much oil will cause
Figure 554 CAM SIDE stamp on piston hydrostatic lock and give incorrect torque reading.
8. Apply clean engine oil to bolt hole threads for
connecting rod and bearing shell in cap before
installing bolts.
330 POWER CYLINDERS

Figure 556 Connecting rod and cap Figure 557 Connecting rod cap
1. Matching numbers or symbols 1. Connecting rod cap (8)
2. Connecting rod bolt (16)

CAUTION: To prevent engine damage, install

connecting rods with correct caps in the correct CAUTION: To prevent engine damage, do not use air
direction. If a rod cap is reversed, an offset will be powered tools to install connecting rod bolts; this can
seen at the mating surfaces. If a reverse assembly is seize rod bolts.
installed on the crankshaft, the connecting rod must
CAUTION: To prevent engine damage, do not rotate
be replaced. Also, check crank pin fillets for damage
crankshaft until connecting rod is fully tightened, as
that would require replacement of the crankshaft.
this may cause bearing shells to rotate in place.
9. Assemble cap to connecting rod with matching
10. Install and tighten connecting rod bolts evenly to
identification code on same crankshaft journal
initial and final torque values (page 332).
from which it was removed. Be certain that longer
leg of connecting rod and CAM SIDE stamp on 11. Repeat installation procedure for remaining
piston crown are positioned towards camshaft. connecting rod and piston assemblies.
12. Check connecting rod side clearance with feeler
gauge. See procedure in removal section (page
319).
 POWER CYLINDERS 331

Specifications
Table 29 Power Cylinders
Connecting Rods
Connecting rod length (center to center) 176 mm (6.929 in)
Piston pin bore inside diameter 38.542 to 38.849 mm (1.5174 to 1.5295 in)
Material I-Beam section - powdered metal
Bearing bore diameter (crankshaft end) 75.987 to 76.013 mm (2.9916 to 2.9926 in)
Bearing bore maximum out-of-round 0.013 mm (0.0005 in)
Connecting rod bearing inside diameter 72.031 to 72.073 mm (2.8359 to 2.8375 in)
Connecting rod bearing running clearance
0.015 to 0.089 mm (0.0006 to 0.0035 in)
(diameter)
Connecting rod side clearance 0.230 to 0.730 mm (0.0091 to 0.0287 in)
Weight (complete rod without bearing) 1274.89 to 1295.89 g (2.811 to 2.857 lb)
Pistons
Material Aluminum Alloy
1
Skirt diameter 98.114 to 98.146 mm (3.863 to 3.864 in)
1
Measure 15.5 mm (0.610 in) from bottom, at 90° to the piston pin. Measure only at room temperature
of 19 to 21 °C (66 to 70 °F).
Service Piston:
Standard size 98.114 to 98.146 mm (3.863 to 3.864 in)
0.254 mm (0.010 in) oversize 98.368 to 98.400 mm (3.873 to 3.874 in)
0.508 mm (0.020 in) oversize 98.622 to 98.654 mm (3.883 to 3.884 in)
0.762 mm (0.030 in) oversize 98.876 to 98.908 mm (3.893 to 3.894 in)
Top compression ring groove width (measured over 2.10 mm (0.082 in) gauge pins):
Upper limit 96.606 mm (3.8033 in)
Replacement limit 96.406 mm (3.7955 in)
Ring groove (side clearance):
Intermediate compression 0.050 to 0.096 mm (0.0020 to 0.0038 in)
Oil control 0.040 to 0.095 mm (0.00157 to 0.00374 in)
Piston height above crankcase deck (protrusion) 0.609 to 0.863 mm (0.0240 to 0.0340 in)
Piston skirt clearance 0.045 to 0.095 mm (0.0018 to 0.0037 in)
Piston Pins
Length 74.6 to 75.0 mm (2.9371 to 2.9528 in)
Diameter 38.491 to 38.501 mm (1.5154 to 1.5158 in)
Pin fit at room temperature of 19 to 21 °C (66 to 70 °F):
332 POWER CYLINDERS

Table 29 Power Cylinders (cont.)

Clearance in connecting rod (piston pin
0.041 to 0.058 mm (0.0016 to 0.0022 in)
bore)
Clearance in piston (piston pin bore) 0.011 to 0.027 mm (0.0004 to 0.0011 in)
End clearance 0.84 mm (0.0331 in)
Piston Rings
Ring diameter (standard): 98.2 mm (3.866 in)
Ring gap in bore:
Top compression 0.29 to 0.55 mm (0.011 to 0.021 in)
Intermediate compression 1.42 to 1.68 mm (0.0559 to 0.0661 in)
Oil control 0.24 to 0.50 mm (0.009 to 0.019 in)

Special Torque

Table 30 Power Cylinders

Initial 45 N·m (33 lbf·ft)
Connecting rod bolts
Final 68 N·m (50 lbf·ft)

Special Service Tools

Table 31 Power Cylinders

Description Tool Number
1–2 inch micrometer Obtain locally
2–3 inch micrometer Obtain locally
3–4 inch micrometer Obtain locally
Dial indicator with magnetic base Obtain locally
Feeler gauge Obtain locally
Glaze breaker brush Obtain locally
Piston Gauge Pins (2.0828 mm [0.082 in]) ZTSE4513
Piston Ring Compressor ZTSE4714
Piston ring expansion pliers Obtain locally
Telescoping gauge set Obtain locally
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 333

Table of Contents

Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .335

Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .336
Preliminary Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .336
Lower Crankcase Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338
Crankshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .338
Piston Cooling Tubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339
Camshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .339
Camshaft Bushings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .340
Coolant Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .340

Cleaning, Inspection, and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341

Crankcase Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341
Crankcase Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .341
Crankcase Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .342
Cylinder Deglazing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .343
Crankshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .343
Main Bearing Fit Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .344
Piston Cooling Tubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345
Camshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .345
Measuring Camshaft Bushings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346
Coolant Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .346

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347
Camshaft Bushings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347
Camshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347
Piston Cooling Tubes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .348
Crankshaft Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .348
Lower Crankcase Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .349
Coolant Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352

Special Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353

Special Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353

334 CRANKCASE, CRANKSHAFT, AND CAMSHAFT
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 335

Exploded View

Figure 558 Crankcase, Crankshaft, and Camshaft

1. Upper crankcase assembly 6. Upper main bearing (4) 10. Crankcase lower seal (2)
2. Piston cooling tube assembly (8) 7. Upper thrust bearing 11. Lower crankcase assembly
3. M6 x 18 bolt (8) 8. Crankshaft assembly 12. M14 x 114 main bearing bolt (10)
4. Camshaft bushing (5) 9. Crankshaft lower main bearing 13. M14 x 127 main bearing bolt (10)
5. Camshaft assembly (5)
336 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Removal NOTE: See the following service sections for

information on removal of components prior to this
section.

GOVERNMENT REGULATION: Engine • Engine Electrical

fluids (oil, fuel, and coolant) may be a hazard • Exhaust Gas Recirculation (EGR) System
to human health and the environment.
Handle all fluids and other contaminated • Variable Geometry Turbocharger (VGT)
materials (e.g. filters, rags) in accordance • Air Compressor and Power Steering/Fuel Pump
with applicable regulations. Recycle
or dispose of engine fluids, filters, and • Fuel System
other contaminated materials according to • Intake and Exhaust Manifolds
applicable regulations.
• Front Cover, Cooling System, and Related
Components

WARNING: To prevent personal injury or • Cylinder Head and Valve Train

death, read all safety instructions in the “Safety • Oil Cooler and Filter Housing
Information” section of this manual.
• Flywheel and Flywheel Housing
WARNING: To prevent personal injury or • Lower Oil Pan, Upper Oil Pan and Oil Pickup Tube
death, shift transmission to park or neutral, set
• Power Cylinders
parking brake, and block wheels before doing
diagnostic or service procedures. Preliminary Checks

WARNING: To prevent personal injury or

death, make sure engine has cooled before
removing components.

WARNING: To prevent personal injury or

death, do not let engine fluids stay on your skin.
Clean skin and nails using hand cleaner and wash
with soap and water. Wash or discard clothing
and rags contaminated with engine fluids.

Figure 559 Camshaft assembly gear backlash

check (camshaft gear to crankshaft gear)
1. Dial indicator with magnetic base
2. Camshaft gear

1. Check and record camshaft gear backlash as

follows:
a. Mount dial indicator with magnetic base (page
353) on rear of engine.
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 337

b. Position dial indicator tip on a gear tooth and forward. Compare dial indicator reading with
remove lash by slowly turning camshaft gear specifications (page 352).
until all play is gone.
d. If end play exceeds specified limits, replace
c. Zero the dial indicator. camshaft assembly.
d. Turn gear back and forth by hand and read
indicator.
e. If camshaft gear backlash exceeds specified
limits (page 352), replace camshaft assembly.

Figure 561 Crankshaft end play

3. Check crankshaft end play as follows:

a. Mount dial indicator on lower crankcase
Figure 560 Camshaft end play assembly with indicator tip on end of
crankshaft gear as shown.
b. Move crankshaft forward with pry bar and
2. Reposition dial indicator and check camshaft end
zero the dial indicator.
play as follows:
c. Move crankshaft back and forth while reading
a. Push camshaft to front of engine.
dial indicator. Compare dial indicator reading
b. Zero the dial indicator. with specifications (page 352).
c. Place a small pry bar between camshaft d. If end play exceeds specified limits, replace
gear and crankcase and gently pry camshaft upper thrust bearing.
338 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Lower Crankcase Assembly 4. Remove main bearing shells from lower

crankcase by pushing bearing shells out of
bearing saddles.
CAUTION: To prevent engine damage, use
permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.
5. Beginning from front of engine, number lower
shells with bearing number (1 to 5) and put shells
aside for inspection.

Crankshaft Assembly

Figure 562 Main bearing bolts

1. M14 x 127 main bearing bolt (10)
2. M14 x 114 main bearing bolt (10)

NOTE: Save main bearing bolts to perform main

bearing fit check.
1. Remove 10 M14 x 127 main bearing bolts.
2. Remove 10 M14 x 114 main bearing bolts.

Figure 564 Lifting sling

1. Lifting sling
2. Crankshaft assembly

WARNING: To prevent personal injury or

death, use a correct size lifting sling and hoist
with a safety latch on hook.
1. Install a bolt in each end of crankshaft.
CAUTION: To prevent engine damage, do not bend,
drop or mar crankshaft.
Figure 563 Lower crankcase assembly
2. Attach lifting sling to crankshaft over bolts
1. Lower crankcase assembly installed in crankshaft. Lift crankshaft straight up
2. Upper crankcase assembly and out of lower crankcase assembly.
3. Remove bearings from upper main bearing
saddles by pushing bearings out.
3. Separate and remove lower crankcase assembly
from upper crankcase assembly.
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 339

CAUTION: To prevent engine damage, use Camshaft Assembly

permanent markers to identify internal components
or their orientation. Do not use paint or temporary
markers.
4. Number upper bearings to match lower bearings
and put aside for inspection.

Piston Cooling Tubes

Figure 566 Camshaft thrust plate bolts

1. M8 x 16 bolt (2)
2. Camshaft gear

1. Remove two M8 x 16 camshaft thrust plate bolts.

Figure 565 Piston cooling tube

1. M6 x 18 bolt (8)
2. Piston cooling tube (8)

Remove each piston cooling tube by removing its

special patch type mounting bolt (M6 x 18). The bolts
are reusable, providing bolt is cleaned and inspected,
and Liquid Gasket (RTV) (page 353) is added to bolt
threads before installation.

Figure 567 Camshaft assembly

NOTE: If engine is mounted on a revolving stand,

rotate engine face up, allowing for easy removal of
camshaft.
2. Remove camshaft from upper crankcase
assembly by lifting assembly straight up and out.
340 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Camshaft Bushings 3. Assemble pulling screw in Camshaft Bushing

Remover/Installer (expanding collet) and tighten
1. Determine necessity of replacing bushings based
backup nut until collet fits tightly in camshaft
on running clearance (page 345).
bushing. To prevent nicks on bushings, be careful
when inserting or removing threads of pulling
screw.
4. Attach pulling plate, thrust bearing, and drive
nut on pulling screw. Tighten nut against thrust
bearing and pulling plate. Continue to tighten nut
on pulling screw until camshaft bushing is free
from upper crankcase assembly.

Coolant Heater

Figure 568 Camshaft bushing

1. Camshaft bushing remover/installer (expanding
collet)
2. Pulling screw (from Camshaft Bushing Service Set )

2. Use Camshaft Bushing Service Set (page

353) with Camshaft Bushing Remover/Installer
(expanding collet) (page 353) to remove all
camshaft bushings. Install Camshaft Bushing
Remover/Installer (expanding collet in collapsed Figure 569 Coolant heater
state) in camshaft bushing.
NOTE: Hold a wrench on end of pulling screw to Remove coolant heater from right rear side of upper
prevent screw from turning. crankcase assembly and discard O-ring.
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 341

Cleaning, Inspection, and Testing

Crankcase Assembly
Crankcase Cleaning
NOTE: Thoroughly clean and inspect upper and
lower crankcase assemblies before and after
reconditioning.
1. Clean upper and lower crankcase assemblies
in a chemical bath or hot tank. This removes
all carbonized material and mineral deposits in
coolant passages.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi). Figure 570 Main oil gallery cleaning
2. If a hot tank is not available, do the following steps:
a. Use non-metallic stiff bristle brushes and 5. Clean main oil galleries with Oil Gallery Cleaning
scrapers to clean gasket material from Brush (page 353).
machined surfaces of upper crankcase CAUTION: To prevent engine damage, install gasket
assembly. and cover within 5 minutes of Liquid Gasket (RTV)
b. Clean cylinder bore with soap, water, and a application to inhibit the formation of a skin and ensure
stiff nylon brush. a leak proof joint.

c. Clean upper and lower crankcase assemblies NOTE: Use Liquid Gasket (RTV) (page 353) before
in a nonchlorinated solvent. installing main oil gallery cup plugs.

d. Dry with filtered compressed air. 6. Coat edges of new oil gallery cup plugs with
Liquid Gasket (RTV) (page 353). Use Oil Gallery
3. Remove main oil gallery cup plugs (in rear of Plug Driver (page 353) and install new oil gallery
upper crankcase assembly) using a punch and cup plugs. The Oil Gallery Plug Driver installs oil
hammer near edge of plug and striking with gallery cup plugs to correct depth. They should be
hammer. flush with upper crankcase assembly surface to
4. Remove plugs from upper crankcase assembly approximately 1.50 mm (0.060 in) below surface.
and discard.

Figure 571 Cylinder head bolt holes

342 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

CAUTION: To prevent engine damage, clean and dry a. Measure entire deck surface. If gap exceeds
threads in the upper crankcase assembly bolt holes specifications (page 352), replace upper
with filtered compressed air. Dirt or oil in holes may crankcase assembly.
cause binding and incorrect torque readings.
7. Clean cylinder head bolt holes with Cylinder Head
Bolt Tap (page 353).

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
8. Blow out chips with filtered compressed air.

Crankcase Inspection
1. After cleaning, inspect upper crankcase assembly
for cracks, scoring, roughness or wear at cylinder
bores.
Figure 573 Out-of-round cylinder bore check

CAUTION: To prevent engine damage, if cylinder

bores are deeply scored, out-of-round or exceed
specifications, bore out cylinders to oversize
specification.
NOTE: If cylinder walls have minor surface damage,
but are otherwise within out-of-round specifications,
it may be possible to remove damage by deglazing
(page 343) .
3. Use a cylinder bore gauge (page 353) to check
cylinder bore out-of-round conditions.
a. Measure diameter of each cylinder bore at
top of piston ring travel. Be sure to measure
Figure 572 Flatness check for top surface of at a right angle to center line of crankshaft
upper crankcase assembly assembly (dimension A).
1. Straightedge b. Measure each bore so gauge reading
2. Feeler gauge coincides with center line of crankshaft
3. Upper crankcase assembly top surface assembly (dimension B).
c. The difference between dimension A and
dimension B is out-of-round condition at top
CAUTION: To prevent engine damage, do not
of cylinder bore.
resurface the crankcase if surface defects exceed
specifications. 4. Repeat procedure at bottom of ring travel to check
for out-of-round condition.
2. Use a straightedge (page 353) to check top
surface of upper crankcase assembly (firing NOTE: If cylinder bore is suitable for use without
deck) for flatness. Insert a feeler gauge (page reconditioning, deglaze cylinder bore before
353) between straightedge and upper crankcase assembling. See Cylinder Deglazing (page 343) for
assembly head surface. further details.
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 343

5. If cylinder bore is within specifications (page 352), 5. Withdraw deglazing hone from cylinder bore while
standard size pistons and rings may be used. rotating. Wipe portion of cylinder wall and inspect
crosshatch pattern.
NOTE: The crosshatch pattern left by the abrasive tool
Cylinder Deglazing
should be approximately 45°. If pattern is flatter than
NOTE: Remove piston cooling tubes before deglazing required, increase up and down stroke speed or slow
cylinder bores. down drill rotation as required.
1. Use deglazing hone (four inch) (page 353) 6. Continue deglazing cylinder bore for 10 to 15
to deglaze cylinder bore. This brush quickly seconds or 20 to 25 strokes.
deglazes cylinder walls and produces a
7. Wipe cylinder bore clean and inspect bore for
crosshatch pattern on cylinder wall surface in
correct 45° crosshatch pattern.
a single operation. The brush contours itself to
cylinder wall and conditions wall surface without 8. After deglazing, thoroughly clean cylinder bores
altering cylinder bore. with soft bristle brush, soap and water.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
9. Dry with filtered compressed air.
10. Lubricate bores with clean engine oil

Crankshaft Assembly
1. Clean and inspect crankshaft and main bearings.
2. Clean crankshaft with a suitable solvent.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Figure 574 Deglazing hone (four-inch) Limit compressed air pressure to 207 kPa (30 psi).
3. Dry with filtered compressed air.
2. Spray cylinder and deglazing hone with 4. Use a stiff nylon brush to clean oil passages in
penetrating fluid or equivalent. crankshaft. Loosen accumulated dirt, sludge, and
NOTE: For a successful procedure 100 to 120 rpm is deposits.
required. 5. Flush oil passages with a suitable solvent.
3. Attach deglazing hone to a variable speed electric 6. Inspect crankshaft journals (main and connecting
or air powered drill. rod) for scratches, grooves, and scoring.
NOTE: Do not allow deglazing hone to spin in one 7. Inspect main bearings for scratches, grooves,
place. Deglazing hone must be moved in a constant scoring, pitting, and inconsistent coloring.
up and down motion to maintain crosshatch pattern.
4. Deglaze cylinder wall for about 15 seconds.
Stroke bore up and down at a rate of one complete
up and down stroke per second.
344 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Main Bearing Fit Check

NOTE: Bearing shells must fit tightly in the bore.
When bearing shells are inserted into upper and lower
crankcase assembly, they protrude above parting
line. This protrusion is required to achieve bearing
crush.

Bearing shells across open ends are slightly larger

than the diameter of main bearing bore into which
they are assembled. This condition is designed into
bearing shell, causing it to spread outward at parting
line when bearing crush load is applied by tightening
bolts. Some flexibility may be lost in normal use,
but bearing replacement is not required because of a
nominal loss of flexibility.
Figure 575 Measurement of crankshaft main
journal When assembly is drawn up tight, bearing is
compressed, ensuring positive contact between
backside of bearing and bore.

Figure 576 Measurement of crankshaft

connecting rod journal Figure 577 Torque sequence for main bearing
bolts

CAUTION: To prevent engine damage, grind or

install new crankshaft if journals exceed maximum CAUTION: To prevent engine damage, install longer
out-of-round or taper specifications. main cap bolts (M14 x 127) inboard and shorter main
cap bolts (M14 x 114) outboard.
CAUTION: To prevent engine damage, do not rework
bearings or bearing caps to reduce journal-to-bearing 1. Lubricate old main bearing bolts with clean engine
running clearances. Grind or install new crankshaft. oil. Assemble lower crankcase assembly to upper
crankcase assembly with new bearing shells
8. Use a 3–4 inch micrometer (page 353) to measure
installed.
diameter of each journal (main and connecting
rod). Measure each journal at two points 90° 2. Tighten bolts using above sequence as follows:
apart. Move micrometer over entire width of
• Tighten bolts to 149 N·m (110 lbf·ft).
journal. If journal wear exceeds specifications
(page 352), grind or replace crankshaft. • Tighten bolts to 176 N·m (130 lbf·ft).
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 345

• Tighten bolts to 231 N·m (170 lbf·ft). Camshaft Assembly

3. Using a telescoping gauge (page 353), measure NOTE: This engine uses hydraulic valve tappets with
inside diameter of main bearing at two locations roller followers. A roller follower guide is needed
90° apart. Average the two inside diameters. to maintain correct orientation of roller to cam lobe.
Normal clearance between the valve tappet roller and
4. Use a 3–4 inch micrometer (page 353) to measure
guide allows for slight tracking of roller across cam
each crankshaft main journal diameter.
lobe.
5. Subtract crankshaft main journal diameter from
respective main bearing inside diameter to obtain Tracking of the roller is normal when the roller
bearing-to-crankshaft running clearance. Repeat accelerates and decelerates during engine operation.
for each crankshaft main journal. Consequently, a typical wear pattern on cam lobes will
exhibit tracks from side to side, have wide and narrow
CAUTION: To prevent engine damage, do not rework
areas from the loading and unloading of follower. The
bearings or bearing caps to reduce journal-to-bearing
wear pattern (tracking) is normal and the camshaft
running clearances. Grind or install new crankshaft.
does not require replacement.
NOTE: Plastigage® may be used as an alternate
1. Inspect camshaft. If any lobes are scuffed, scored
method to determine running clearance.
or cracked, replace camshaft assembly.
6. If bearing-to-crankshaft running clearances
2. After inspection, evaluate camshaft main journal
exceed specifications (page 352) because of
and lobe condition as follows:
wear on crankshaft, replace or grind crankshaft
and install under-size precision type bearing NOTE: When measuring the camshaft with a
shells. micrometer, always take two measurements 90°
apart.

Piston Cooling Tubes

1. With piston cooling tubes removed, run a correct
size wire through each tube to ensure no
blockage.

WARNING: To prevent personal injury or

death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi).
2. Use dry filtered compressed air to blow out any
remaining debris.
3. Replace any cracked or bent tubes.

Figure 578 Measurement of camshaft bearing

journal

a. Use a 2-3 inch micrometer (page 353)

to measure journal diameter of camshaft
bearing. If bearing journals are worn beyond
specification (page 352), install a new
camshaft assembly.
346 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Measuring Camshaft Bushings

Figure 579 Measurement of camshaft intake and

exhaust lobes
Figure 580 Measurement of camshaft bushing
1. Camshaft assembly
inside diameter
2. Micrometer
1. Outside micrometer
2. Telescoping gauge
b. To check camshaft intake and exhaust lobes,
measure across (A to C) and across (B to
D). Subtract (B to D) from (A to C). This will Inspect five camshaft bushings for wear and correct
give cam lobe lift. Subtract this amount from running clearance as follows:
maximum lobe lift in specifications (page
1. Use a telescoping gauge set (page 353) and 2-3
352) to obtain cam lobe wear measurement.
inch micrometer to measure camshaft bushing
Replace camshaft assembly if cam lobe wear
inside diameters with bushings installed in
exceeds specifications (page 352).
crankcase.
3. Inspect thrust plate for wear, cracks or distortion.
2. To determine running clearance, subtract
Use a 0–1 inch micrometer (page 353) to measure
previous camshaft journal diameter readings from
thrust plate thickness. If thickness does not
camshaft bushing inside diameter readings.
meet specification (page 352), replace camshaft
assembly. 3. If maximum allowable running clearance
is exceeded (page 352), replace camshaft
4. Inspect camshaft gear for worn or damaged teeth.
bushings. See camshaft bushing removal (page
5. Wash camshaft in cleaning solvent with a soft 340) in this section.
brush.
4. Inspect each bushing bore in upper crankcase
assembly for burrs or debris that could damage
WARNING: To prevent personal injury or new bushings.
death, wear safety glasses with side shields.
Limit compressed air pressure to 207 kPa (30 psi). 5. Remove burrs and clean bores thoroughly before
installing new camshaft bushings.
6. Dry with filtered compressed air.

Coolant Heater
1. Inspect heater for continuity.
2. Check insulator at terminal for cracks.
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 347

Installation 5. To aid in alignment of bushing and upper

crankcase assembly oil holes, use a marker
Camshaft Bushings
to indicate oil hole location on backup nut of
1. Lubricate new camshaft bushings and crankcase installation tool. Repeat this step for each
bores with clean engine oil. camshaft bushing.
6. Install all camshaft bushings through rear of upper
crankcase assembly. Pull bushings in place at
rear of upper crankcase assembly by turning
pulling nut on pulling screw until bushing is flush
on both sides with upper crankcase assembly.
Remove Camshaft Bushing Remover/Installer
(expanding collet) (page 353) and inspect oil hole
alignment.

Camshaft Assembly
1. Coat camshaft lobes and bushing journals with
clean engine oil.

Figure 581 Installation of cam bushing

1. Camshaft bushing
2. Camshaft Bushing Remover/Installer (expanding
collet)
3. Pulling screw (from Camshaft Bushing Service Set

2. Slide a new bushing onto Camshaft Bushing

Remover/Installer (expanding collet) ZTSE4489
(page 353).
3. Thread pulling screw (from Camshaft Bushing
Service Set), backup nut, and Camshaft Bushing
Remover/Installer (expanding collet) (page 353)
together. Figure 582 Camshaft assembly
4. Tighten expanding collet by turning backup
nut until bushing is securely held on Camshaft
NOTE: Do not nick or scratch camshaft bushings with
Bushing Remover/Installer (expanding collet)
cam lobes.
(page 353).
2. Position upper crankcase assembly with rear
CAUTION: To prevent engine damage, ensure correct
of engine facing up on engine stand and install
oil circulation through the crankcase. Align camshaft
camshaft assembly.
bushing oil holes with corresponding oil supply holes
machined in crankcase.
348 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

CAUTION: To prevent engine damage, install special

patch type bolts to mount piston cooling tubes.
NOTE: The bolt-on piston cooling tubes are
self-aligning.
1. Place piston cooling tubes on upper crankcase
assembly mounting pad.
2. When installing piston cooling tube bolts, do one
of the following:
a. Install new special patch type mounting bolts
(M6 x 18).
b. Remove oil residue and apply Liquid Gasket
(RTV) (page 353) to threads of existing
special patch type mounting bolts (M6 x 18).
Figure 583 Camshaft thrust plate bolts
3. Install and tighten bolts to standard torque (page
1. M8 x 16 bolt (2) 383).
2. Camshaft gear

Crankshaft Assembly
3. Install two M8 x 16 camshaft thrust plate bolts.
Tighten bolts to standard torque (page 383). NOTE: Make sure crankshaft assembly has been
inspected per instructions in this section before
4. Verify that camshaft end play is within proceeding.
specifications (page 352).
1. Use a lint-free cloth to wipe upper crankcase
assembly bearing supports free of oil.
Piston Cooling Tubes 2. Inspect each bearing. Replace scored, chipped
or worn bearings.
NOTE: When inserting main bearings, make sure
oil is not between back side of bearing and upper
crankcase assembly bearing saddles.
NOTE: Make sure upper thrust bearing is installed at
number four upper main bearing journal.
3. Place upper main bearings in upper crankcase
assembly. Make sure locking tabs on bearings are
snapped in saddle and oil holes in bearings line up
with oil holes in upper crankcase assembly.

Figure 584 Piston cooling tube

1. M6 x 18 bolt (8)
2. Piston cooling tube (8)
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 349

CAUTION: To prevent engine damage, do not bend,

drop or mar crankshaft.
6. Install a bolt in each end of the crankshaft
assembly (if removed). Attach hoist and lifting
sling around crankshaft bolts and lower it onto
five main bearings.

Figure 585 Upper main bearings lubrication

4. Lubricate bearings with clean engine oil.

5. Rotate camshaft so timing mark on camshaft gear
is pointing upwards.

Figure 587 Crankshaft and camshaft timing

marks

7. Install crankshaft so timing mark on gear aligns

with timing mark on camshaft gear.

Lower Crankcase Assembly

With acceptable bearing clearance as determined
in Main Bearing Fit Check (page 344), install lower
crankcase assembly as follows:
NOTE: When inserting main bearings, make sure oil is
not between back side of bearing and lower crankcase
Figure 586 Lifting sling assembly bearing saddles.

1. Lifting sling 1. Place crankshaft lower main bearings in lower

2. Crankshaft assembly crankcase assembly. Make sure locking tabs on
bearings are snapped in saddle.
2. Install new lower crankcase assembly seals.

WARNING: To prevent personal injury or 3. Apply clean engine oil to lower bearing inserts,
death, use a correct size lifting sling and hoist crankshaft journals, and main bearing bolts.
with a safety latch on hook.
350 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

6. Tighten bolts using above sequence as follows:

• Tighten bolts to 149 N·m (110 lbf·ft).
• Tighten bolts to 176 N·m (130 lbf·ft).
• Tighten bolts to 231 N·m (170 lbf·ft).

Figure 588 Main bearing bolts

1. M14 x 127 main bearing bolt (10)
2. M14 x 114 main bearing bolt (10)

CAUTION: To prevent engine damage, install new

bolts for lower crankcase assembly if lower crankcase Figure 590 Camshaft assembly gear backlash
assembly is serviced. check (camshaft gear to crankshaft gear)
CAUTION: To prevent engine damage, install longer 1. Dial indicator with magnetic base
main cap bolts (M14 x 127) inboard and shorter main 2. Camshaft gear
cap bolts (M14 x 114) outboard.
4. Install 10 new M14 x 127 main bearing bolts.
NOTE: Confirm that camshaft gear backlash is within
5. Install 10 new M14 x 114 main bearing bolts. specifications.
NOTE: Crankshaft gear must be fixed and not allowed
to rotate; the camshaft gear must rotate, for a correct
reading.
7. Check and record backlash for camshaft
gear-to-crankshaft gear as follows:
a. Mount dial indicator with magnetic base (page
353) on rear of engine.
b. Position dial indicator tip on a gear tooth and
remove lash.
c. Zero the dial indicator.
d. Rotate gear by hand and read indicator.
e. If backlash exceeds specified limits (page
352), replace camshaft assembly.
Figure 589 Torque sequence for main bearing
bolts
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 351

d. If end play exceeds specified limits, replace

upper thrust bearing.

Coolant Heater

Figure 591 Crankshaft end play

8. Check crankshaft end play as follows:

a. Mount dial indicator on lower crankcase
assembly with indicator tip on end of Figure 592 Coolant heater
crankshaft gear as shown.
b. Move crankshaft forward with pry bar and 1. Lubricate a new O-ring and install on coolant
zero the dial indicator. heater.
c. Move crankshaft back and forth while reading 2. Install coolant heater in upper crankcase
dial indicator. Compare dial indicator reading assembly and tighten to special torque (page
with specifications (page 352). 353).
352 CRANKCASE, CRANKSHAFT, AND CAMSHAFT

Specifications
Table 32 Crankcase, Crankshaft, and Camshaft
Upper Crankcase Assembly
Maximum firing deck gap 0.130 mm (0.005 in)
Maximum cylinder bore out-of round allowance 0.0125 mm (0.005 in)
Cylinder bore diameter:
Standard size 98.200 mm (3.8661 in)
0.254 mm (0.010 in) over size 98.454 mm (3.8761 in)
0.508 mm (0.020 in) over size 98.708 mm (3.8861 in)
0.762 mm (0.030 in) over size 98.962 mm (3.8961 in)
Crankshaft Assembly
Main Bearing Journal Diameter:
Standard size 80.9873 to 81.0127 mm (3.1885 to 3.1895 in)
0.254 mm (0.010 in) under size 80.7333 to 80.7587 mm (3.1785 to 3.1795 in)
0.508 mm (0.020 in) under size 80.4793 to 80.5047 mm (3.1685 to 3.1695 in)
0.762 mm (0.030 in) under size 80.2253 to 80.2507 mm (3.1585 to 3.1595 in)

Main bearing thrust face maximum runout 0.050 mm (0.002 in)

Main bearing to crankshaft running clearance 0.020 to 0.086 mm (0.0008 to 0.0034 in)
Connecting Rod Journal Diameter:
Standard size 71.987 to 72.013 mm (2.834 to 2.835 in)
0.254 mm (0.010 in) under size 71.733 to 71.759 mm (2.824 to 2.825 in)
0.508 mm (0.020 in) under size 71.479 to 71.505 mm (2.814 to 2.815 in)
0.762 mm (0.030 in) under size 71.225 to 71.251 mm (2.804 to 2.805 in)
Crankshaft end play:
Nominal new 0.203 mm (0.008 in)
Maximum service 0.508 mm (0.020 in)
Camshaft Assembly
Bearing journal diameter (all journals) 61.987 to 62.013 mm (2.440 to 2.441 in)
Bearing inside diameter (installed) 62.05 to 62.14 mm (2.443 to 2.446 in)
Camshaft journal and bushing running clearance 0.037 to 0.153 mm (0.0015 to 0.0060 in)
Camshaft end play 0.051 to 0.211 mm (0.002 to 0.008 in)
Camshaft gear backlash 0.179 to 0.315 mm (0.007 to 0.012 in)
Maximum permissible cam lobe wear 0.51 mm (0.02 in)
Camshaft thrust plate thickness 3.589 to 3.649 mm (0.1413 to 0.1436 in)
 CRANKCASE, CRANKSHAFT, AND CAMSHAFT 353

Table 32 Crankcase, Crankshaft, and Camshaft (cont.)

Camshaft lobe lift (maximum):
Intake 5.820 mm (0.2291 in)
Exhaust 5.906 mm (0.2325 in)

Special Torque
Table 33 Crankcase, Crankshaft, and Camshaft
Main bearing bolts See tightening procedure and sequence
Coolant heater 41 N·m (30 lbf·ft)

Special Service Tools

Table 34 Crankcase, Crankshaft, and Camshaft
Description Tool Number
0–1 inch micrometer Obtain locally
2–3 inch micrometer Obtain locally
3–4 inch micrometer Obtain locally
Camshaft Bushing Service Set ZTSE2893B
Camshaft Bushing Remover/Installer (expanding collet) ZTSE4489
Cylinder bore gauge Obtain locally
Deglazing hone (four inch) Obtain locally
Dial indicator with magnetic base Obtain locally
Feeler gauge Obtain locally
Cylinder Head Bolt Tap ZTSE4744
Lifting sling Obtain locally
Liquid Gasket (RTV) (6 oz. tube) 1830858C1
Oil Gallery Cleaning Brush ZTSE4511
Oil Gallery Plug Driver ZTSE4512
Straightedge Obtain locally
Telescoping gauge set Obtain locally
354 CRANKCASE, CRANKSHAFT, AND CAMSHAFT
 ABBREVIATIONS AND ACRONYMS 355

Table of Contents

Abbreviations and Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357

Abbreviations and Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .357
356 ABBREVIATIONS AND ACRONYMS
 ABBREVIATIONS AND ACRONYMS 357

Abbreviations and Acronyms CKPO – Crankshaft Position Out

cm – Centimeter
Abbreviations and Acronyms
CMP – Camshaft Position
A or amp – Ampere CMPO – Camshaft Position Out
ABDC – After Bottom Dead Center CO – Carbon Monoxide
ABS – Antilock Brake System COO – Cruise On / Off switch
AC – Alternating Current CPU – Central Processing Unit
A/C – Air Conditioner CTC – Coolant Temperature Compensation
ACC – Air Conditioner Control Cyl – Cylinder
ACCEL – Accelerate
DB – Decibel
ACD – Air Conditioner Demand
DCA – Diesel Coolant Additive
ACT PWR GND – Actuator Power Ground
DDI – Digital Direct Fuel Injection
AF – Air to Fuel ratio
DDS – Driveline Disengagement Switch
AFT – Aftertreatment
DLC – Data Link Connector
AIT – Air Intake Temperature
DME – Dimethyl Ether
Amb – Ambient
DMM – Digital Multimeter
amp or A – Ampere
DOC – Diesel Oxidation Catalyst
AMS – Air Management System
DPF – Diesel Particulate Filter
API – American Petroleum Institute
DT – Diesel Turbocharged
APS – Accelerator Position Sensor
DTC – Diagnostic Trouble Code
APS/IVS – Accelerator Position Sensor / Idle
DTRM – Diesel Thermo Recirculation Module
Validation Switch
ASTM – American Society for Testing and Materials EBP – Exhaust Back Pressure
ATA – American Trucking Association EBPD – Exhaust Back Pressure Desired
ATDC – After Top Dead Center ECI – Engine Crank inhibit
AWG – American Wire Gauge ECL – Engine Coolant Level
ECM – Electronic Control Module
B+ or VBAT – Battery Voltage
ECM PWR – Electronic Control Module Power
BARO – Barometric Absolute Pressure
ECT – Engine Coolant Temperature
BBDC – Before Bottom Dead Center
EFP – Engine Fuel Pressure
BCP – Brake Control Pressure
EFRC – Engine Family Rating Code
BCS – Boost Control Solenoid
EFT – Engine Fuel Temperature
BDC – Bottom Dead Center
EG – Ethylene Glycol
bhp – Brake Horsepower
EGC – Electronic Gauge Cluster
BNO – Brake Normally Open
EGDP – Exhaust Gas Differential Pressure
BOO – Brake On / Off
EGR – Exhaust Gas Recirculation
BPS – Brake Pressure Switch
EGRH – Exhaust Gas Recirculation High control
BSV – Brake Shut-off Valve
EGRL – Exhaust Gas Recirculation Low control
BTDC – Before Top Dead Center
EGRP – Exhaust Gas Recirculation Position
BTU – British Thermal Unit
EGT1 – Exhaust Gas Temperature 1
C – Celsius EGT2 – Exhaust Gas Temperature 2
CAC – Charge Air Cooler EGT3 – Exhaust Gas Temperature 3
CAN – Controller Area Network EMI – Electromagnetic Interference
CAP – Cold Ambient Protection EOP – Engine Oil Pressure
CARB – California Air Resources Board EOT – Engine Oil Temperature
cc – Cubic centimeter EPA – Environmental Protection Agency
CCA – Cold Cranking Ampere EPR – Engine Pressure Regulator
CID – Cubic Inch Displacement ESC – Electronic System Controller
cfm – Cubic feet per minute ESN – Engine Serial Number
cfs – Cubic feet per second EST – Electronic Service Tool
CKP – Crankshaft Position EWPS – Engine Warning Protection System
358 ABBREVIATIONS AND ACRONYMS

F – Fahrenheit ITVL – Intake Throttle Valve Low control

FCV – Fuel Coolant Valve ITVP – Intake Throttle Valve Position
FEL – Family Emissions Limit IVS – Idle Validation Switch
fhp – Friction horsepower
JCT – Junction (electrical)
FMI – Failure Mode Indicator
FPC – Fuel Pump Control kg – Kilogram
FPCV – Fuel Pressure Control Valve km – Kilometer
fpm – Feet per minute km/h – Kilometers per hour
fps – Feet per second km/l – Kilometers per liter
FRP – Fuel Rail Pressure KOEO – Key-On Engine-Off
ft – Feet KOER – Key-On Engine-Running
FVCV – Fuel Volume Control Valve kPa – Kilopascal
GND – Ground (electrical) L – Liter
gal – Gallon L/h – Liters per hour
gal/h – U.S. Gallons per hour L/m – Liters per minute
gal/min – U. S. Gallons per minute L/s – Liters per second
GCW – Gross Combined Weight lb – Pound
GCWR – Gross Combined Weight Rating lbf – Pounds of force
GPC – Glow Plug Control lb/s – Pounds per second
GPD – Glow Plug Diagnostic lbf ft – Pounds of force per foot
GPR – Glow Plug Relay lbf in – Pounds of force per inch
GVW – Gross Vehicle Weight lbm – Pounds of mass
LSD – Low Sulfur Diesel
H2O – Water
HC – Hydrocarbons m – Meter
HFCM – Horizontal Fuel Conditioning Module m/s – Meters per second
Hg – Mercury MAF – Mass Air Flow
hp – Horsepower MAG – Magnetic
HPFP – High-Pressure Fuel Pump MAP – Manifold Absolute Pressure
hr – Hour MAT – Manifold Air Temperature
Hyd – Hydraulic mep – Mean effective pressure
mi – Mile
IAT – Intake Air Temperature
mm – Millimeter
IAHC – Inlet Air Heater Control
mpg – Miles per gallon
IAHD – Inlet Air Heater Diagnostic
mph – Miles per hour
IAHR – Inlet Air heater Relay
MPR – Main Power Relay
IC – Integrated Circuit
MSDS – Material Safety Data Sheet
ICP – Injector Control Pressure
MSG – Micro Strain Gauge
ID – Inside Diameter
MSM – Multiplex System Module
IDM – Injector Drive Module
MY – Model Year
IGN – Ignition
ILO – Injector Leak Off NC – Normally closed (electrical)
in – Inch NETS – Navistar Electronics Technical Support
inHg – Inch of mercury Nm – Newton meter
inH2O – Inch of water NO – Normally Open (electrical)
INJ – Injector NOX – Nitrogen Oxides
IPR – Injection Pressure Regulator
OAT – Organic Acid Technology
ISIS – International® Service Information System
OCC – Output Circuit Check
IST – Idle Shutdown Timer
OCP – Overcrank Protection
ITP – Internal Transfer Pump
OD – Outside Diameter
ITV – Intake Throttle Valve
OL – Over Limit
ITVH – Intake Throttle Valve High control
 ABBREVIATIONS AND ACRONYMS 359

ORH – Out-of-Range High SIG GRD – Signal Ground

ORL – Out-of-Range Low S/N – Serial Number
OSHA – Occupational Safety and Health SW – Switch (electrical)
Administration SYNC – Synchronization
OWL – Oil/Water Lamp
TACH – Tachometer output signal
PID – Parameter Identifier TBD – To Be Determined
P/N – Part Number TCAPE – Truck Computer Analysis of Performance
ppm – Parts per million and Economy
PROM – Programmable Read Only Memory TDC – Top Dead Center
psi – Pounds per square inch TCM – Transmission Control Module
psia – Pounds per square inch absolute TTS – Transmission Tailshaft Speed
psig – Pounds per square inch gauge
ULSD – Ultra Low Sulfur Diesel
pt – Pint
UVC – Under Valve Cover
PTO – Power Takeoff
PWM – Pulse Width Modulate V – Volt
PWR – Power (voltage) VBAT or B+ – Battery Voltage
VC – Volume Control
qt – Quart
VEPS – Vehicle Electronics Programming System
RAM – Random Access Memory VGT – Variable Geometry Turbocharger
RAS – Resume / Accelerate Switch (speed control) VIGN – Ignition Voltage
REPTO – Rear Engine Power Takeoff VIN – Vehicle Identification Number
RFI – Radio Frequency Interference VOP – Valve Opening Pressure
rev – Revolution VRE – Vehicle Retarder Enable
rpm – Revolutions per minute VREF – Reference Voltage
RPRE – Remote Preset VSO – Vehicle Speed Output
RSE – Radiator Shutter Enable VSS – Vehicle Speed Sensor
RVAR – Remote Variable
WEL – Warn Engine Lamp
SAE – Society of Automotive Engineers® WIF – Water In Fuel
SCA – Supplemental Cooling Additive WTEC – World Transmission Electronically Controlled
SCCS – Speed Control Command Switches automatic transmissions (Allison)
SCS – Speed Control Switch
XMSN – Transmission
SHD – Shield (electrical)
SID – Subsystem Identifier
360 ABBREVIATIONS AND ACRONYMS
 TERMINOLOGY 361

Table of Contents

Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .363
362 TERMINOLOGY
 TERMINOLOGY 363

Terminology output of an engine, sometimes-called flywheel

horsepower is less than the indicated horsepower by
Terms
the amount of friction horsepower consumed in the
Accessory work – The work per cycle required engine.
to drive engine accessories (normally, only those
Brake Horsepower (bhp) net – Net brake
essential to engine operation).
horsepower is measured with all engine components.
Actuator – A device that performs work in response The power of an engine when configured as a fully
to an input signal. equipped engine. (SAE J1349 JUN90)
Aeration – The entrainment of air or combustion gas Calibration – The data values used by the strategy
in coolant, lubricant, or fuel. to solve equations and make decisions. Calibration
values are stored in ROM and put into the processor
Aftercooler (Charge Air Cooler) – A heat exchanger
during programming to allow the engine to operate
mounted in the charge air path between the
within certain parameters.
turbocharger and engine intake manifold. The
aftercooler reduces the charge air temperature by Catalyst – A substance that produces a chemical
transferring heat from the charge air to a cooling reaction without undergoing a chemical change itself.
medium (usually air).
Catalytic converter – An antipollution device in the
Ambient temperature – The environmental air exhaust system that contains a catalyst for chemically
temperature in which a unit is operating. In general, converting some pollutants in the exhaust gases
the temperature is measured in the shade (no solar (carbon monoxide, unburned hydrocarbons, and
radiation) and represents the air temperature for other oxides of nitrogen) into harmless compounds.
engine cooling performance measurement purposes.
Cavitation – A dynamic condition in a fluid system that
Air entering the radiator may or may not be the same
forms gas-filled bubbles (cavities) in the fluid.
ambient due to possible heating from other sources
or recirculation. (SAE J1004 SEP81) Cetane number – 1. The auto-ignition quality of
diesel fuel.
Ampere (amp) – The standard unit for measuring the
strength of an electrical current. The flow rate of a 2. A rating applied to diesel fuel similar to octane
charge in a conductor or conducting medium of one rating for gasoline.
coulomb per second. (SAE J1213 NOV82)
3. A measure of how readily diesel fuel starts to burn
Analog – A continuously variable voltage. (self-ignites) at high compression temperature.
Analog to digital converter (A/D) – A circuit in the Diesel fuel with a high cetane number self-ignites
ECM processing section that converts an analog shortly after injection into the combustion chamber.
signal (DC or AC) to a usable digital signal for the Therefore, it has a short ignition delay time. Diesel
microprocessor. fuel with a low cetane number resists self-ignition.
Therefore, it has a longer ignition delay time.
American Trucking Association (ATA) Datalink –
A serial datalink specified by the American Trucking Charge air – Dense, pressurized, heated air
Association and the SAE. discharged from the turbocharger.
Boost pressure – 1. The pressure of the charge air Charge Air Cooler (CAC) – See Aftercooler.
leaving the turbocharger.
Closed crankcase – A crankcase ventilation that
2. Inlet manifold pressure that is greater than recycles crankcase gases through a breather, then
atmospheric pressure. Obtained by turbocharging. back to the clean air intake.
Bottom Dead Center (BDC) – The lowest position of Closed loop operation – A system that uses a sensor
the piston during the stroke. to provide feedback to the ECM. The ECM uses the
sensor to continuously monitor variables and adjust
Brake Horsepower (bhp) – The power output from
to match engine requirements.
an engine, not the indicated horsepower. The power
364 TERMINOLOGY

Cloud point – The point when wax crystals occur in Disable – A computer decision that deactivates a
fuel, making fuel cloudy or hazy. Usually below -12 °C system and prevents operation of the system.
(10 °F).
Displacement – The stroke of the piston multiplied by
Cold cranking ampere rating (battery rating) – The the area of the cylinder bore multiplied by the number
sustained constant current (in amperes) needed to of cylinders in the engine.
produce a minimum terminal voltage under a load of
Driver (high side) – A transistor within an electronic
7.2 volts per battery after 30 seconds.
module that controls the power to an actuator circuit.
Continuous Monitor Test – An ECM function that
Driver (low side) – A transistor within an electronic
continuously monitors the inputs and outputs to
module that controls the ground to an actuator circuit.
ensure that readings are within set limits.
Duty cycle – A control signal that has a controlled
Coolant – A fluid used to transport heat from one point
on/off time measurement from 0 to 100%. Normally
to another.
used to control solenoids.
Coolant level switch – A switch sensor used to
Engine lamp – An instrument panel lamp that comes
indicate low coolant level.
on when DTCs are set. DTCs can be read as flash
Crankcase – The housing that encloses the codes (red and amber instrument panel lamps).
crankshaft, connecting rods, and allied parts.
Engine OFF tests – Tests that are done with the
Crankcase breather – A vent for the crankcase to ignition switch ON and the engine OFF.
release excess interior air pressure.
Engine rating – Engine rating includes Rated hp and
Crankcase pressure – The force of air inside the Rated rpm.
crankcase against the crankcase housing.
Engine RUNNING tests – Tests done with the engine
Current – The flow of electrons passing through a running.
conductor. Measured in amperes.
Exhaust brake – A brake device using engine
Damper – A device that reduces the amplitude of exhaust back pressure as a retarding medium.
torsional vibration. (SAE J1479 JAN85)
Exhaust manifold – Exhaust gases flow through the
Deaeration – The removal or purging of gases (air or exhaust manifold to the turbocharger exhaust inlet and
combustion gas) entrained in coolant or lubricating oil. are directed to the EGR cooler.
Deaeration tank – A separate tank in the cooling Fault detection/management – An alternate control
system used for one or more of the following functions: strategy that reduces adverse effects that can be
caused by a system failure. If a sensor fails, the ECM
• Deaeration
substitutes a good sensor signal or assumed sensor
• Coolant reservoir (fluid expansion and afterboil) value in its place. A lit amber instrument panel lamp
signals that the vehicle needs service.
• Coolant retention
Filter restriction – A blockage, usually from
• Filling
contaminants, that prevents the flow of fluid through
• Fluid level indication (visible) a filter.
Diagnostic Trouble Code (DTC) – Formerly called Flash code – See Diagnostic Trouble Code (DTC).
a Fault Code or Flash Code. A DTC is a three digit
Fuel inlet restriction – A blockage, usually from
numeric code used for troubleshooting.
contaminants, that prevents the flow of fluid through
Digital Multimeter (DMM) – An electronic meter that the fuel inlet line.
uses a digital display to indicate a measured value.
Fuel pressure – The force that the fuel exerts on the
Preferred for use on microprocessor systems because
fuel system as it is pumped through the fuel system.
it has a very high internal impedance and will not load
down the circuit being measured.
 TERMINOLOGY 365

Fuel strainer – A pre-filter in the fuel system that • High idle is maximum rpm at no load.
keeps larger contaminants from entering the fuel
Intake manifold – A collection of tubes through which
system.
the fuel-air mixture flows from the fuel injector to the
Fully equipped engine – A fully equipped engine intake valves of the cylinders.
is an engine equipped with only those accessories
International NGV Tool Utilized for Next
necessary to perform its intended service. A fully
Generation Electronics (INTUNE) – The diagnostics
equipped engine does not include components
software for chassis related components and
that are used to power auxiliary systems. If these
systems.
components are integral with the engine or for any
reason are included on the test engine, the power Low speed digital inputs – Switched sensor inputs
absorbed may be determined and added to the net that generate an on/off (high/low) signal to the ECM.
brake power. (SAE J1995 JUN90) The input to the ECM from the sensor could be from
a high input source switch (usually 5 or 12 volts) or
Fusible link (fuse link) – A fusible link is a special
from a grounding switch that grounds the signal from
section of low tension cable designed to open the
a current limiting resistor in the ECM that creates a low
circuit when subjected to an extreme current overload.
signal (0 volts).
(SAE J1156 APR86)
Lubricity – Lubricity is the ability of a substance
Gradeability – The maximum percent grade which
to reduce friction between solid surfaces in relative
the vehicle can transverse for a specified time at a
motion under loaded conditions.
specified speed. The gradeability limit is the grade
upon which the vehicle can just move forward. (SAE Lug (engine) – A condition when the engine is
J227a) operating at or below maximum torque speed.
Gross Combined Weight Rating (GCWR) – Manometer – A double-leg liquid-column gauge, or a
Maximum combined weight of towing vehicle single inclined gauge, used to measure the difference
(including passengers and cargo) and the trailer. The between two fluid pressures. Typically, a manometer
GCWR indicates the maximum loaded weight that the records in inches of water.
vehicle is allowed to tow.
MasterDiagnostics® (MD) – The diagnostics
Gross brake horsepower – The power of a complete software for engine related components and systems.
basic engine, with air cleaner, without fan, and
Microprocessor – An integrated circuit in a
alternator and air compressor not charging.
microcomputer that controls information flow.
Hall effect – The development of a transverse electric
Nitrogen Oxides (NOx) – Nitrogen oxides form by
potential gradient in a current-carrying conductor or
a reaction between nitrogen and oxygen at high
semiconductor when a magnetic field is applied.
temperatures and pressures in the combustion
Hall effect sensor – Generates a digital on/off signal chamber.
that indicates speed and timing.
Normally closed – Refers to a switch that remains
High speed digital inputs – Inputs to the ECM from closed when no control force is acting on it.
a sensor that generates varying frequencies (engine
Normally open – Refers to a switch that remains open
speed and vehicle speed sensors).
when no control force is acting on it.
Horsepower (hp) – Horsepower is the unit of work
Ohm (Ω) – The unit of resistance. One ohm is the
done in a given period of time, equal to 33,000 pounds
value of resistance through which a potential of one
multiplied by one foot per minute. 1hp = 33,000 lb x
volt will maintain a current of one ampere. (SAE J1213
1 ft /1 min.
NOV82)
Hydrocarbons – Unburned or partially burned fuel
On demand test – A self test that the technician
molecules.
initiates using the EST and is run from a program in
Idle speed – the processor.
• Low idle is minimum rpm at no load.
366 TERMINOLOGY

Output Circuit Check (OCC) – An On demand test Reference voltage (VREF) – A 5 volt reference supplied
done during an Engine OFF self test to check the by the ECM to operate the engine sensors.
continuity of selected actuators.
Reserve capacity – Time in minutes that a fully
pH – A measure of the acidity or alkalinity of a solution. charged battery can be discharged to 10.5 volts at 25
amperes.
Particulate matter – Particulate matter includes
mostly burned particles of fuel and engine oil. Signal ground – The common ground wire to the
ECM for the sensors.
Piezometer – An instrument for measuring fluid
pressure. Speed Control Command Switches (SCCS) – A set
of switches used for cruise control, Power TakeOff
Power – Power is a measure of the rate at which work
(PTO), and remote hand throttle system.
is done. Compare with Torque.
Steady state condition – An engine operating
Power TakeOff (PTO) – Accessory output, usually
at a constant speed and load and at stabilized
from the transmission, used to power a hydraulic
temperatures and pressures. (SAE J215 JAN80)
pump for a special auxiliary feature (garbage packing,
lift equipment, etc). Strategy – A plan or set of operating instructions
that the microprocessor follows for a desired goal.
Pulse Width Modulate (PWM) – The time that an
Strategy is the computer program itself, including
actuator, such as an injector, remains energized.
all equations and decision making logic. Strategy is
Random Access Memory (RAM) – Computer always stored in ROM and cannot be changed during
memory that stores information. Information can calibration.
be written to and read from RAM. Input information
Stroke – Stroke is the movement of the piston from
(current engine speed or temperature) can be stored
Top Dead Center (TDC) to Bottom Dead Center
in RAM to be compared to values stored in Read Only
(BDC).
Memory (ROM). All memory in RAM is lost when the
ignition switch is turned off. Substrate – Material that supports the washcoating
or catalytic materials.
Rated gross horsepower – Engine gross
horsepower at rated speed as declared by the System restriction (air) – The static pressure
manufacturer. (SAE J1995 JUN90) differential that occurs at a given air flow from air
entrance through air exit in a system. Usually
Rated horsepower – Maximum brake horsepower
measured in inches (millimeters) of water. (SAE
output of an engine as certified by the engine
J1004 SEP81)
manufacturer. The power of an engine when
configured as a basic engine. (SAE J1995 JUN90) Tachometer output signal – Engine speed signal for
remote tachometers.
Rated net horsepower – Engine net horsepower at
rated speed as declared by the manufacturer. (SAE Thermistor – A semiconductor device. A sensing
J1349 JUN90) element that changes resistance as the temperature
changes.
Rated speed – The speed, as determined by the
manufacturer, at which the engine is rated. (SAE Thrust load – A thrust load pushes or reacts through
J1995 JUN90) a bearing in a direction parallel to the shaft.
Rated torque – Maximum torque produced by an Top Dead Center (TDC) – The uppermost position of
engine as certified by the manufacturer. the piston during the stroke.
Ratiometric Voltage – In a Micro Strain Gauge Torque – A force having a twisting or turning effect.
(MSG) sensor pressure to be measured exerts force For a single force, the cross product of a vector from
on a pressure vessel that stretches and compresses some reference point to the point of application of the
to change resistance of strain gauges bonded to force within the force itself. Also known as moment of
the surface of the pressure vessel. Internal sensor force or rotation moment. Torque is a measure of the
electronics convert the changes in resistance to a ability of an engine to do work.
ratiometric voltage output.
 TERMINOLOGY 367

Truck Computer Analysis of Performance and Viscosity – The internal resistance to the flow of any
Economy (TCAPE) – Truck Computer Analysis of fluid.
Performance and Economy is a computer program
Viscous fan – A fan drive that is activated when a
that simulates the performance and fuel economy of
thermostat, sensing high air temperature, forces fluid
trucks.
through a special coupling. The fluid activates the fan.
Turbocharger – A turbine driven compressor
Volt (v) – A unit of electromotive force that will move
mounted to the exhaust manifold. The turbocharger
a current of one ampere through a resistance of one
increases the pressure, temperature and density of
Ohm.
intake air to charge air.
Voltage – Electrical potential expressed in volts.
Variable capacitance sensor – A variable
capacitance sensor is measures pressure. The Voltage drop – Reduction in applied voltage from the
pressure forces a ceramic material closer to a thin current flowing through a circuit or portion of the circuit
metal disc in the sensor, changing the capacitance of current multiplied by resistance.
the sensor.
Voltage ignition – Voltage supplied by the ignition
Vehicle Electronic System Programming System – switch when the key is ON.
The computer system used to program electronically
Washcoat – A layer of alumina applied to the
controlled vehicles.
substrate in a monolith-type converter.
Vehicle Retarder Enable/Engage – Output from the
ECM to a vehicle retarder.
Vehicle Speed Sensor (VSS) – Normally a magnetic
pickup sensor mounted in the tailshaft housing of the
transmission, used to indicate ground speed.
368 TERMINOLOGY
 APPENDIX A – SPECIFICATIONS 369

Table of Contents

Variable Geometry Turbocharger (VGT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371

Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371
Intake and Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371
Front Cover, Cooling System, and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .372
Cylinder Head and Valve Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .372
Oil Cooler and Filter Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .374
Flywheel and Flywheel Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .374
Crankcase, Crankshaft, and Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376
370 APPENDIX A – SPECIFICATIONS
 APPENDIX A – SPECIFICATIONS 371

Variable Geometry Turbocharger (VGT)

Table 35 Variable Geometry Turbocharger (VGT) Shaft

Turbine shaft axial end play 0.05 - 0.10 mm (0.002 - 0.004 in).

Fuel System

Table 36 Fuel Filter

Fuel Filter

Primary fuel filter type 10 micron with water separation

Secondary fuel filter type 4 micron with water separation
Normal fuel pressure (after secondary fuel
48 - 69 kPa (7 - 10 psi)
filter)

Intake and Exhaust Manifolds

Table 37 Intake, Inlet, and Exhaust Manifolds

Exhaust Manifold
Maximum allowable warpage 0.08 mm (0.003 in)
372 APPENDIX A – SPECIFICATIONS

Front Cover, Cooling System, and Related

Components

Table 38 Front Cover, Cooling System, and Related Components

Vibration Damper
Face runout (maximum) 0.635 mm (0.025 in)
Rubber bulging (maximum) 1.5 mm (0.060 in)
Lubricating Oil Pump
Type Gerotor
Drive Crankshaft
Location Oil pump housing assembly
Pressure Regulating Valve:
Engine oil pressure, low idle (min. @ 110 °C
69 kPa (10 psi)
(230 °F) oil temp.)
Engine oil pressure, high idle (min. @ 110 °C
276 kPa (40 psi)
(230 °F) oil temp.)
Oil pump discharge pressure (2,500 rpm) 483 to 621 kPa (70 to 90 psi)
End clearance (inner and outer oil pump gerotor to oil
0.025 to 0.095 mm (0.001 to 0.004 in)
pump housing assembly)
Radial clearance (between outer oil pump gerotor
0.15 to 0.28 mm (0.006 to 0.011 in)
and oil pump housing assembly)
Thermostat Assembly With Bypass
Type Balanced pressure, wax pellet
Minimum recommended coolant operating
71° C (160° F)
temperature
Start-to-open temperature, 0.20 mm (0.009 in) stroke 92 to 96° C (198 to 205° F)
Full-open temperature, 10 mm (0.394 in) stroke 106° C (222.8° F)
Thermostat Assembly Without Bypass
Type Balanced pressure, wax pellet
Minimum recommended coolant operating
71° C (160° F)
temperature
Start-to-open temperature, 0.20 mm (0.009 in) stroke 86.7 to 91° C (188 to 196° F)
Full-open temperature, 10 mm (0.394 in) stroke 104° C (219.1° F)

Cylinder Head and Valve Train

Table 39 Cylinder Head and Valve Train

Exhaust Valves
Stem diameter 6.946 to 6.964 mm (0.2735 to 0.2742 in)
 APPENDIX A – SPECIFICATIONS 373

Table 39 Cylinder Head and Valve Train (cont.)

Stem to guide running clearance (max.
0.1846 mm (0.00727 in)
allowable before replacement) diametrically
Valve face angle from center line 50.5 – 50.75°
Valve margin (minimum) 1.53 mm (0.060 in)
Valve recession in head 0.37 – 0.73 mm (0.0146 – 0.0287 in)
Intake Valves
Stem diameter 6.946 to 6.964 mm (0.2735 to 0.2742 in)
Stem to guide running clearance (max.
0.1846 mm (0.00727 in)
allowable before replacement)

Valve face angle from center line 53.0 – 53.25°

Valve margin (minimum) 1.40 mm (0.055 in)

Valve recession in head 0.37 – 0.73 mm (0.0146 – 0.0287 in)
Cylinder Heads
Valve guide inside diameter 7.003 to 7.029 mm (0.276 to 0.277 in)
Valve guide bore runout 0.06 mm (0.00236 in)
Valve guide taper (maximum) 0.10 mm (0.004 in)
Valve seat width (intake) 1.80 to 2.56 mm (0.071 to 0.101 in)
Valve seat width (exhaust) 1.48 to 2.24 mm (0.058 to 0.088 in)
Valve seat angle (intake) from center line of
52.5 – 52.75°
valve guide
Valve seat angle (exhaust) from center line of
50.0 – 50.25°
valve guide
0.025 mm per 25 x 25 mm
Gasket surface flatness
Maximum 0.10 mm (0.004 in) per total surface area
Overall thickness of cylinder head
95 ± 0.48 mm (3.74 ± 0.018 in)
(deck-to-deck)
Valve Spring:
Solid height 36.1 mm (1.42 in)
Compressed* 46.50 mm @ 340 ± 17 N (1.83 in @ 76.5 ± 3.8 lbf)
Compressed* 38.30 mm @ 850 ± 43 N (1.51 in @ 191.1 ± 9.7 lbf)
* Spring must be compressed to a solid height before checking test loads.
Push Rods
Runout (maximum) 0.5 mm (0.02 in)
374 APPENDIX A – SPECIFICATIONS

Oil Cooler and Filter Housing

Table 40 Oil Cooler and Oil Filter

Oil Cooler
Type Full flow, fin
Location Engine valley (forward)
Oil Filter
Type Cartridge, full flow - disposable
Location Front, oil cooler mounted
Filter bypass location Oil filter return tube assembly

Flywheel and Flywheel Housing

Table 41 Flywheel and Flywheel Housing

Flywheel Assembly
Flywheel assembly surface maximum runout
0.25 mm (0.010 in)
(manual)
Power Steering Idler Shaft
Power steering idler shaft height 34.6 ± 0.15 mm (1.4 ± 0.01 in)
Crankcase Rear Cover
Crankcase rear cover maximum runout 0.51 mm (0.020 in)
Crankshaft Flange and Power Steering Idler Gear Assembly
Face runout:
Crankshaft flange 0.050 mm (0.002 in) maximum
Backlash:
Power steering idler gear assembly 0.066 to 0.290 mm (0.0026 to 0.0114 in)

Table 42 Power Cylinders

Connecting Rods
Connecting rod length (center to center) 176 mm (6.929 in)
Piston pin bore inside diameter 38.542 to 38.849 mm (1.5174 to 1.5295 in)
Material I-Beam section - powdered metal
Bearing bore diameter (crankshaft end) 75.987 to 76.013 mm (2.9916 to 2.9926 in)
Bearing bore maximum out-of-round 0.013 mm (0.0005 in)
Connecting rod bearing inside diameter 72.031 to 72.073 mm (2.8359 to 2.8375 in)
Connecting rod bearing running clearance
0.015 to 0.089 mm (0.0006 to 0.0035 in)
(diameter)
Connecting rod side clearance 0.230 to 0.730 mm (0.0091 to 0.0287 in)
 APPENDIX A – SPECIFICATIONS 375

Table 42 Power Cylinders (cont.)

Weight (complete rod without bearing) 1274.89 to 1295.89 g (2.811 to 2.857 lb)
Pistons
Material Aluminum Alloy
1
Skirt diameter 98.114 to 98.146 mm (3.863 to 3.864 in)
1
Measure 15.5 mm (0.610 in) from bottom, at 90° to the piston pin. Measure only at room temperature
of 19 to 21 °C (66 to 70 °F).
Service Piston:
Standard size 98.114 to 98.146 mm (3.863 to 3.864 in)
0.254 mm (0.010 in) oversize 98.368 to 98.400 mm (3.873 to 3.874 in)
0.508 mm (0.020 in) oversize 98.622 to 98.654 mm (3.883 to 3.884 in)
0.762 mm (0.030 in) oversize 98.876 to 98.908 mm (3.893 to 3.894 in)
Top compression ring groove width (measured over 2.10 mm (0.082 in) gauge pins):
Upper limit 96.606 mm (3.8033 in)
Replacement limit 96.406 mm (3.7955 in)
Ring groove (side clearance):
Intermediate compression 0.050 to 0.096 mm (0.0020 to 0.0038 in)
Oil control 0.040 to 0.095 mm (0.00157 to 0.00374 in)
Piston height above crankcase deck (protrusion) 0.609 to 0.863 mm (0.0240 to 0.0340 in)
Piston skirt clearance 0.045 to 0.095 mm (0.0018 to 0.0037 in)
Piston Pins
Length 74.6 to 75.0 mm (2.9371 to 2.9528 in)
Diameter 38.491 to 38.501 mm (1.5154 to 1.5158 in)
Pin fit at room temperature of 19 to 21 °C (66 to 70 °F):
Clearance in connecting rod (piston pin
0.041 to 0.058 mm (0.0016 to 0.0022 in)
bore)
Clearance in piston (piston pin bore) 0.011 to 0.027 mm (0.0004 to 0.0011 in)
End clearance 0.84 mm (0.0331 in)
Piston Rings
Ring diameter (standard): 98.2 mm (3.866 in)
Ring gap in bore:
Top compression 0.29 to 0.55 mm (0.011 to 0.021 in)
Intermediate compression 1.42 to 1.68 mm (0.0559 to 0.0661 in)
Oil control 0.24 to 0.50 mm (0.009 to 0.019 in)
376 APPENDIX A – SPECIFICATIONS

Crankcase, Crankshaft, and Camshaft

Table 43 Crankcase, Crankshaft, and Camshaft

Upper Crankcase Assembly
Maximum firing deck gap 0.130 mm (0.005 in)
Maximum cylinder bore out-of round allowance 0.0125 mm (0.005 in)
Cylinder bore diameter:
Standard size 98.200 mm (3.8661 in)
0.254 mm (0.010 in) over size 98.454 mm (3.8761 in)
0.508 mm (0.020 in) over size 98.708 mm (3.8861 in)
0.762 mm (0.030 in) over size 98.962 mm (3.8961 in)
Crankshaft Assembly
Main Bearing Journal Diameter:
Standard size 80.9873 to 81.0127 mm (3.188 to 3.1895 in)
0.254 mm (0.010 in) under size 80.7333 to 80.7587 mm (3.178 to 3.1795 in)
0.508 mm (0.020 in) under size 80.4793 to 80.5047 mm (3.168 to 3.1695 in)
0.762 mm (0.030 in) under size 80.2253 to 80.2507 mm (3.158 to 3.1595 in)

Main bearing thrust face maximum runout 0.050 mm (0.002 in)

Main bearing to crankshaft running clearance 0.020 to 0.086 mm (0.0008 to 0.0034 in)
Connecting Rod Journal Diameter:
Standard size 71.987 to 72.013 mm (2.834 to 2.835 in)
0.254 mm (0.010 in) under size 71.733 to 71.759 mm (2.824 to 2.825 in)
0.508 mm (0.020 in) under size 71.479 to 71.505 mm (2.814 to 2.815 in)
0.762 mm (0.030 in) under size 71.225 to 71.251 mm (2.804 to 2.805 in)
Crankshaft end play:
Nominal new 0.203 mm (0.008 in)
Maximum service 0.508 mm (0.020 in)
Camshaft Assembly
Bearing journal diameter (all journals) 61.987 to 62.013 mm (2.440 to 2.441 in)
Bearing inside diameter (installed) 62.05 to 62.14 mm (2.443 to 2.446 in)
Camshaft journal and bushing running clearance 0.037 to 0.153 mm (0.0015 to 0.0060 in)
Camshaft end play 0.051 to 0.211 mm (0.002 to 0.008 in)
Camshaft gear backlash 0.179 to 0.315 mm (0.007 to 0.012 in)
Maximum permissible cam lobe wear 0.51 mm (0.02 in)
Camshaft thrust plate thickness 3.589 to 3.649 mm (0.1413 to 0.1436 in)
 APPENDIX A – SPECIFICATIONS 377

Table 43 Crankcase, Crankshaft, and Camshaft (cont.)

Camshaft lobe lift (maximum):
Intake 5.820 mm (0.2291 in)
Exhaust 5.906 mm (0.2325 in)
378 APPENDIX A – SPECIFICATIONS
 APPENDIX B – TORQUES 379

Table of Contents

General Torque. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .381

Bolt Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .381
General Torque Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .382
Standard Torque Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .383
Using a Torque Wrench Extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .384

Special Torques. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385

Mounting Engine on Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
Engine Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
Exhaust Gas Recirculation (EGR) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .385
Variable Geometry Turbocharger (VGT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
Air Compressor and Power Steering/Fuel Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .386
Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .387
Intake and Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .388
Front Cover, Cooling System, and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .390
Cylinder Head and Valve Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .391
Oil Cooler and Filter Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393
Flywheel and Flywheel Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .393
Lower Oil Pan, Upper Oil Pan, and Oil Pickup Tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .394
Power Cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .394
Crankcase, Crankshaft, and Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .395
380 APPENDIX B – TORQUES
 APPENDIX B – TORQUES 381

General Torque
Bolt Identification

Figure 593 Metric fasteners – Classification and identification

Figure 594 Special fasteners – Classification and identification

382 APPENDIX B – TORQUES

General Torque Guidelines coated) do require oil lubrication to threads and under
head area for correct torque application.
CAUTION: To prevent engine damage, do not
substitute fasteners. All original equipment fasteners Threads that are dry, excessively rough, battered,
are hardened and phosphate coated. or filled with dirt require considerable effort just to
rotate. Then when the clamping load is developed or
NOTE: Inspect parts for cleanliness and defects
the bolt tension is applied, the torque reading mounts
before assembly.
rapidly (due to thread friction) to the specified torque
Many conditions affect torque and the results of value. However, the desired bolt tension and correct
torque applications. The major purpose in tightening clamping load is not achieved. This condition can
a fastener to a specified torque is to obtain a clamping lead to failure of the fastener to maintain component
load which exceeds any possible loading imposed on integrity. The correct bolt tension and clamping effect
parts. can never be attained if the fastener is dry. Fastener
threads must be new condition phosphate coated
New phosphate coated fasteners do not require oil
or have a film of clean lubricant (engine oil) to be
lubrication during assembly and torque application.
considered lubricated.
Reused fasteners (even if originally phosphate
 APPENDIX B – TORQUES 383

Standard Torque Charts

Standard torque chart provides tightening values for
all hardware that do not require special torque.

Standard Torque Values - Class 10.9 Metric Flange Head Bolts and Studs
Thread Diameter (mm) Thread Pitch (mm) Torque
6 1 13 N·m (115 lbf·in)
8 1.25 31 N·m (23 lbf·ft)
10 1.5 62 N·m (45 lbf·ft)
12 1.75 107 N·m (79 lbf·ft)
14 2 172 N·m (127 lbf·ft)
15 2 216 N·m (159 lbf·ft)

16 2 266 N·m (196 lbf·ft)

18 2.5 368 N·m (272 lbf·ft)
20 2.5 520 N·m (384 lbf·ft)

Example: Tighten four M6 x 12 pulley bolts to standard To find the standard torque for a M6 x 12 bolt look at
torque. What is the size and standard torque for these the torque chart above. We see the standard torque
four bolts? for a 6 mm thread diameter class 10.9 bolt should be
13 N·m (115 lbf·in).
M6 x 12 refers to the bolts thread diameter and length.
These bolts have a thread diameter of 6 mm and are
12 mm long.
384 APPENDIX B – TORQUES

Using a Torque Wrench Extension

Occasionally an extension, crowfoot, or other adapter
is necessary to use with a torque wrench to torque a
bolt or line fitting. Adding adapters or extensions will
alter the torque on the fastener from what the torque
wrench reads. Use the following formula to calculate
the correct torque wrench setting to achieve a specific
torque value.

Figure 595 Torque wrench and extension

• F - Force applied by technician reach it. What should the torque wrench setting (TS)
be to compensate for the extension?
• L - Total length through which force is applied to
fastener • Torque specified at fastener (TE) = 65 lbf·ft
• TW - Torque applied at end of torque wrench • Length of torque wrench (LW) = 12 inches
TS = TE (LW / (LW + LE)) • Length of extension (LE) = 6 inches
• TS - Torque wrench setting TS = TE (LW / (LW + LE))
• TE - Torque specified at fastener TS = 65 lbf·ft (12 inches / (12 inches + 6 inches)
• LW - Length of torque wrench TS = 65 lbf·ft (12 inches / (18 inches)
• LE - Length of extension TS = 65 lbf·ft (0.666)
Example: A component requires a specified torque TS = 43.33 lbf·ft
value of 65 lbf·ft and a 6 inch extension is required to
 APPENDIX B – TORQUES 385

Special Torques
Mounting Engine on Stand

Table 44 Mounting Engine on Stand

Oil pan drain plug 25 N·m (18 lbf·ft)

Engine Electrical

Table 45 Engine Electrical

Crankshaft Position sensor (CKP) bolt 10 N·m (89 lbf·in)
Camshaft Position sensor (CMP) bolt 10 N·m (89 lbf·in)
Engine Coolant Temperature (ECT) sensor 18 N·m (159 lbf·in)
Fuel Temperature Sensor (FTS) 18 N·m (159 lbf·in)
Engine Oil Pressure (EOP) sensor 12 N·m (106 lbf·in)
Engine Oil Temperature (EOT) sensor 18 N·m (159 lbf·in)
Fuel Pressure Sensor (FPS) 12 N·m (106 lbf·in)
Rail Fuel Pressure (RFP) sensor 2 N·m (18 lbf·in), then turn one hex flat (60 degrees)
Manifold Air Temperature (MAT) sensor 18 N·m (159 lbf·in)
Manifold Absolute Pressure (MAP) sensor 12 N·m (106 lbf·in)
Exhaust Back Pressure (EBP) sensor 20 N·m (177 lbf·ft)
Electronic Control Module (ECM) bolts 13 N·m (115 lbf·in)
ECM support nuts 13 N·m (115 lbf·in)

Exhaust Gas Recirculation (EGR) System

Table 46 Exhaust Gas Recirculation (EGR) System

EGR cooler outlet bolts 25 N·m (18 lbf·ft)
EGR cooler clamps See tightening step in procedure.

Coolant hose clamps 4 N·m (35 lbf·in)

EGR top bracket nuts 57 N·m (42 lbf·ft)

EGR valve assembly bolts 11 N·m (97 lbf·in)

Intake Throttle Valve (ITV) bolts 11 N·m (97 lbf·in)

386 APPENDIX B – TORQUES

Variable Geometry Turbocharger (VGT)

Table 47 Turbocharger Assembly Bolts and Clamps

Turbo air inlet duct clamp 5 N·m (48 lbf·in)
Exhaust tube to exhaust manifold nuts 31 N·m (23 lbf·ft)
Exhaust tube to turbocharger assembly bolts 31 N·m (23 lbf·ft)
Turbo oil supply tube assembly to turbocharger bolt and stud bolt 31 N·m (23 lbf·ft)

Turbo oil supply tube assembly to oil filter base assembly bolt 13 N·m (115 lbf·in)

Turbocharger assembly exhaust outlet V-clamp 10 N·m (89 lbf·in)

Turbo support bolts 50 N·m (37 lbf·ft)

Turbocharger assembly bolts and stud bolts 72 N·m (53 lbf·ft)

Turbo heat shield bolts 10 N·m (89 lbf·in)

Exhaust Back Pressure (EBP) sensor tube fitting nut 20 N·m (177 lbf·in)
EBP sensor tube fitting 27 N·m (239 lbf·in)

Air Compressor and Power Steering/Fuel Pump

Table 48 Air Compressor and Power Steering/Fuel Pump

Air compressor to bracket bolts 72 N·m (53 lbf·ft)
Air compressor bracket to cylinder head bolts 61 N·m (45 lbf·ft)
Air compressor belt tensioner bolt 61 N·m (45 lbf·ft)
Air compressor idler bolts 61 N·m (45 lbf·ft)

Air compressor oil supply hose fitting nut 20 N·m (177 lbf·in)

Suction power steering tube flared tube nut 166 N·m (122 lbf·ft)
Pressure power steering tube flared tube nut 87 N·m (64 lbf·ft)
Tube clamp saddle stud bolts (front) 31 N·m (23 lbf·ft)
Air compressor pulley nut 120 N·m (88 lbf·ft)
 APPENDIX B – TORQUES 387

Fuel System

Table 49 Fuel System Components

High-pressure Fuel Pump (HPFP) assembly bolts 61 N·m (45 lbf·ft)
Pump right tube assembly nuts See tightening step in procedure.
Pump left tube assembly nuts See tightening step in procedure.
Fuel pump cover bolts 13 N·m (116 lbf·in)
Injector leak off check valve 45 N·m (33 lbf·ft)
High-pressure pump to cooler tube assembly cap nut 38 N·m (28 lbf·ft)
Banjo bolts 38 N·m (28 lbf·ft)
Filter to pump tube assembly cap nut 38 N·m (28 lbf·ft)

Hose clamps 3 N·m (26 lbf·in)

3/8” O-ring face seal nuts 41 N·m (30 lbf·ft)

Fuel filter cap (secondary) 27 N·m (20 lbf·ft)
388 APPENDIX B – TORQUES

Intake and Exhaust Manifolds

Figure 596 Torque sequence for intake manifold mounting bolts

 APPENDIX B – TORQUES 389

Figure 597 Torque sequence for right exhaust

manifold mounting bolts

Figure 598 Torque sequence for left exhaust

manifold mounting bolts

Table 50 Intake, Inlet, and Exhaust Manifolds

Intake manifold bolts and stud bolts (use special
11 N·m (100 lbf·in)
torque sequence)
Exhaust manifold heat shield nuts, bolts, and spacers 30 N·m (22 lbf·ft)
Exhaust manifold bolts and stud bolts (use special
30 N·m (22 lbf·ft)
torque sequence)
390 APPENDIX B – TORQUES

Front Cover, Cooling System, and Related

Components

Figure 599 Torque sequence for vibration

damper bolts

Table 51 Front Cover, Cooling System, and Related Components

Alternator and Freon® mounting bracket cap
72 N·m (53 lbf·ft)
screws
Belt tensioner bolt 61 N·m (45 lbf·ft)
Fan and pulley mounting hub bolts 31 N·m (23 lbf·ft)
Fan pulley bolts 31 N·m (23 lbf·ft)
Front crankcase cover bolts 31 N·m (23 lbf·ft)
Front engine mount bracket bolts 107 N·m (79 lbf·ft)
Oil pump housing assembly bolts 22 N·m (16 lbf·ft)
Front Power Takeoff (PTO) pulley bolts 61 N·m (45 lbf·ft)
Thermostat housing stud bolt and bolts 13 N·m (115 lbf·in)
Vibration damper bolts 68 N·m (50 lbf·ft) + 90° rotation
Water pump assembly bolts 31 N·m (23 lbf·ft)
 APPENDIX B – TORQUES 391

Cylinder Head and Valve Train

Figure 600 Cylinder head bolts tightening sequence

392 APPENDIX B – TORQUES

Figure 601 Fuel rail to injector tube assemblies

tightening sequence (typical)

Table 52 Cylinder Head and Valve Train

Lifting eye flat countersunk screws (left cylinder head) 41 N·m (30 lbf·ft)

Lifting eye bolts (right cylinder head) 61 N·m (45 lbf·ft)

Breather inlet adapter 14 N·m (124 lbf·in)
Exhaust Back Pressure (EBP) tube assembly nut 9 N·m (80 lbf·in)
Cylinder head bolt See tightening steps in procedure
Injector clamp bolt See tightening steps in procedure
Dual fulcrum plate assembly bolts See tightening steps in procedure
Rail assembly bolts See tightening steps in procedure
Fuel rail to injector tubes See tightening steps in procedure
Glow plugs 18 N·m (159 lbf·in)
Breather oil drain assembly to crankcase M12 fitting 25 N·m (18 lbf·ft)
Breather support nuts 13 N·m (115 lbf·in)
Valve cover bolt and stud bolt assemblies 9 N·m (80 lbf·in)
Oil fill extension 14 N·m (126 lbf·in)
Lifter guide bolts with washer assembly 13 N·m (115 lbf·in)
Valve cover base assembly bolts 13 N·m (115 lbf·in)
Fuel rail plug assembly 27 N·m (20 lbf·ft)
 APPENDIX B – TORQUES 393

Oil Cooler and Filter Housing

Table 53 Oil Cooler Cover and Oil Filter Housing

Oil cooler cover assembly bolts 31 N·m (23 lbf·ft)
Oil filter cap 26 N·m (18 lbf·ft)
Oil filter return tube assembly screw – with
7 N·m (62 lbf·in)
new oil filter base assembly
Oil filter return tube assembly screw – with
5 N·m (44 lbf·in)
reinstalled oil filter base assembly
Oil filter housing bolts 22 N·m (125 lbf·in)
Oil filter base assembly screws – with new
10 N·m (89 lbf·in)
oil cooler cover assembly
Oil filter base assembly screws – with
7 N·m (62 lbf·in)
reinstalled oil cooler cover assembly

Flywheel and Flywheel Housing

Figure 603 Torque sequence for flexplate

assembly
Figure 602 Crankshaft flange torque sequence
394 APPENDIX B – TORQUES

Figure 604 Torque sequence for flywheel

assembly

Table 54 Flywheel and Flywheel Housing

Crankshaft flange bolts See tightening steps in procedure.
Flexplate assembly bolts See tightening steps in procedure.
Flywheel assembly bolts See tightening steps in procedure.

Lower Oil Pan, Upper Oil Pan, and Oil Pickup

Tube

Table 55 Lower Oil Pan

Oil pan drain plug 25 N·m (18 lbf·ft)
Lower oil pan bolts and stud bolts 13 N·m (115 lbf·in)

Power Cylinders

Table 56 Power Cylinders

Initial 45 N·m (33 lbf·ft)
Connecting rod bolts
Final 68 N·m (50 lbf·ft)
 APPENDIX B – TORQUES 395

Crankcase, Crankshaft, and Camshaft

Figure 605 Torque sequence for main bearing

bolts

Table 57 Crankcase, Crankshaft, and Camshaft

Main bearing bolts See tightening procedure and sequence
Coolant heater 41 N·m (30 lbf·ft)
396 APPENDIX B – TORQUES
 APPENDIX C – SPECIAL SERVICE TOOLS 397

Table of Contents

Special Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399

Mounting Engine on Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399
Engine Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399
Exhaust Gas Recirculation (EGR) System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399
Variable Geometry Turbocharger (VGT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399
Air Compressor and Power Steering/Fuel Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .399
Fuel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400
Intake and Exhaust Manifolds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400
Front Cover, Cooling System, and Related Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400
Cylinder Head and Valve Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .401
Oil Cooler and Filter Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402
Flywheel and Flywheel Housing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402
Power Cylinders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .402
Crankcase, Crankshaft, and Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .403

Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .404

Essential Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .404
398 APPENDIX C – SPECIAL SERVICE TOOLS
 APPENDIX C – SPECIAL SERVICE TOOLS 399

Special Tools
Special tools for the MaxxForce® 7 engine can be
ordered from the SPX Corporation, 1-800-520-2584.

Mounting Engine on Stand

Table 58 Mounting Engine on Stand

Description Tool Number
Engine Stand Mounting Bracket ZTSE4507

Engine Electrical

Table 59 Engine Electrical

Description Tool Number
Fuel Injector Electrical Connector Release Tool ZTSE4820

Exhaust Gas Recirculation (EGR) System

Table 60 Exhaust Gas Recirculation (EGR) System

Description Tool Number
EGR Valve Bore Cleaning Brush ZTSE4753
EGR Valve Puller ZTSE4743
EGR Cooler Test Plates ZTSE4707

Variable Geometry Turbocharger (VGT)

Table 61 Turbocharger
Description Tool Number
Cap Kit (All) Obtain locally
Dial indicator with magnetic base Obtain locally
Turbo Oil Supply Block Off Plug Kit ZTSE4785

Air Compressor and Power Steering/Fuel Pump

Table 62 Power Steering/Fuel Pump

Description Tool Number
Cap Kit (All) Obtain locally
400 APPENDIX C – SPECIAL SERVICE TOOLS

Fuel System

Table 63 Fuel System

Description Tool Number
Fuel System Caps ZTSE4710
Spring lock coupling disconnect tool Obtain locally

Liquid Gasket (RTV) (6 oz. tube) 1830858C1

Intake and Exhaust Manifolds

Table 64 Intake, Inlet, and Exhaust Manifolds

Description Tool Number
Feeler Gauge Obtain locally
Straightedge Obtain locally
Intake Port Covers (cylinder heads) ZTSE4559

Front Cover, Cooling System, and Related

Components

Table 65 Front Cover, Cooling System, and Related Components

Description Tool Number
Dial indicator with magnetic base Obtain locally

Feeler gauge Obtain locally

Front Seal (wear sleeve) Installer ZTSE4691

Front Wear Sleeve Remover ZTSE4705

Liquid Gasket (RTV) (6 oz. tube) 1830858C1

Loctite® 569 hydraulic sealant or equivalent Obtain locally

Slide hammer Obtain locally

Straightedge Obtain locally

 APPENDIX C – SPECIAL SERVICE TOOLS 401

Cylinder Head and Valve Train

Table 66 Cylinder Head and Valve Train

Description Tool Number
Cylinder Head Bolt Tap ZTSE4744
Cylinder Head Lifting Bracket ZTSE4535
Cylinder Head Pressure Test Plate ZTSE4534
Dye Penetrant Kit PT-7191
Fuel Gallery Cleaning Brush ZTSE4541
Injector Cup ZTSE4709
Fuel Injector Rack Holder ZTSE4299B
Fuel Injector Tip Cleaning Brush ZTSE4301
Fuel System Caps ZTSE4710
Glow Plug Sleeve Brush (nylon) ZTSE4533
Glow Plug Sleeve Installer ZTSE4532
Glow Plug Sleeve Remover ZTSE4531
Glow Plug Sleeve Seat Wire Brush ZTSE4589
Injector Sleeve Brushes ZTSE4751
Injector Sleeve Installer ZTSE4733
Injector Sleeve Remover ZTSE4732
Lithium Grease Obtain locally
Loctite® 620 Retaining Compound Obtain locally
P-80® Rubber Lubricant or equivalent Obtain locally
Slide Hammer Kit ZTSE4398
Straightedge Obtain locally
Valve Guide Gauge Tool ZTSE4577
C Type Valve Spring Compressor ZTSE1846
Valve Spring Tester ZTSE2241
Dial Caliper Obtain locally
Feeler Gauge Obtain locally
Pressure Test Regulator and Gauge Obtain locally
0-1 inch Micrometer Obtain locally
3-4 inch Micrometer Obtain locally
Inspection Mirror Obtain locally
402 APPENDIX C – SPECIAL SERVICE TOOLS

Oil Cooler and Filter Housing

Table 67 Oil Cooler

Description Tool Number
Air Pressure Regulator Obtain locally
Oil Cooler Pressure Test Plate ZTSE4730

Flywheel and Flywheel Housing

Table 68 Flywheel and Flywheel Housing

Description Tool Number
Dial caliper Obtain locally
Dial indicator with magnetic base Obtain locally
Gear puller (bar type) Obtain locally
Liquid Gasket (RTV) (6 oz. tube) 1830858C1
Loctite® 569 hydraulic sealant or equivalent Obtain locally
Power Steering Idler Shaft Installation Tool ZTSE4719
Rear Wear Sleeve Installer ZTSE4515-2C
Rear Wear Sleeve Remover ZTSE4889
Slide hammer Obtain locally

Power Cylinders

Table 69 Power Cylinders

Description Tool Number
1–2 inch micrometer Obtain locally
2–3 inch micrometer Obtain locally
3–4 inch micrometer Obtain locally
Dial indicator with magnetic base Obtain locally
Feeler gauge Obtain locally
Glaze breaker brush Obtain locally
Piston Gauge Pins (2.0828 mm [0.082 in]) ZTSE4513
Piston Ring Compressor ZTSE4714
Piston ring expansion pliers Obtain locally
Telescoping gauge set Obtain locally
 APPENDIX C – SPECIAL SERVICE TOOLS 403

Crankcase, Crankshaft, and Camshaft

Table 70 Crankcase, Crankshaft, and Camshaft

Description Tool Number
0–1 inch micrometer Obtain locally
2–3 inch micrometer Obtain locally
3–4 inch micrometer Obtain locally
Camshaft Bushing Service Set ZTSE2893B
Camshaft Bushing Remover/Installer (expanding collet) ZTSE4489
Cylinder bore gauge Obtain locally
Deglazing hone (four inch) Obtain locally
Dial indicator with magnetic base Obtain locally
Feeler gauge Obtain locally
Cylinder Head Bolt Tap ZTSE4744
Lifting sling Obtain locally
Liquid Gasket (RTV) (6 oz. tube) 1830858C1
Oil Gallery Cleaning Brush ZTSE4511
Oil Gallery Plug Driver ZTSE4512
Straightedge Obtain locally
Telescoping gauge set Obtain locally
404 APPENDIX C – SPECIAL SERVICE TOOLS

Special Tools
Essential Tools

Figure 608 ZTSE4707 EGR Cooler Test Plates

Figure 606 ZTSE4785 Turbo Oil Supply Block

Off Plug Kit

Figure 609 ZTSE4710 Fuel System Caps

Figure 607 ZTSE4515–2C Rear SeaI Installer w/
40 mm Cap Screws
 APPENDIX C – SPECIAL SERVICE TOOLS 405

Figure 610 ZTSE4691 Front Seal Installer Figure 612 ZTSE4709 Injector Cups for
ZTSE4299 (8)

Figure 611 ZTSE4705 Front Wear Sleeve

Remover Figure 613 ZTSE4714 Piston Ring Compressor
406 APPENDIX C – SPECIAL SERVICE TOOLS

Figure 614 ZTSE4730 Oil Cooler pressure Test Figure 616 ZTSE473 Injector Sleeve Installer
Plate

Figure 617 ZTSE4743 EGR Valve Puller

Figure 615 ZTSE4732 Injector Sleeve Remover
 APPENDIX C – SPECIAL SERVICE TOOLS 407

Figure 618 ZTSE4744 Cylinder Head Bolt Tap Figure 620 ZTSE4753 EGR Valve Bore Cleaning
Brush

Figure 619 ZTSE4751 Injector Sleeve Brushes

Figure 621 ZTSE4783 Glow Plug Installer Sleeve
408 APPENDIX C – SPECIAL SERVICE TOOLS

Figure 622 ZTSE4723 Glow Plug Socket

Figure 623 ZTSE4889 Rear Wear Sleeve

Remover