ENGINE

EM
A

EM
SECTION
ENGINE MECHANICAL C

E
CONTENTS
VQ40DE AIR CLEANER FILTER ..................................... 16 F
Exploded View .........................................................16
PRECAUTION ............................................... 4 Removal and Installation .........................................16
G
PRECAUTIONS ................................................... 4 SPARK PLUG ................................................... 17
Precaution for Supplemental Restraint System Exploded View .........................................................17
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Removal and Installation .........................................17
SIONER" ................................................................... 4 H
Precaution Necessary for Steering Wheel Rota- CAMSHAFT VALVE CLEARANCE .................. 19
tion After Battery Disconnect ..................................... 4 Valve Clearance ......................................................19
Precaution for Drain Engine Coolant ......................... 5 I
Precaution for Disconnecting Fuel Piping ................. 5
COMPRESSION PRESSURE ........................... 23
Compression Pressure ............................................23
Precaution for Removal and Disassembly ................ 5
Precaution for Inspection, Repair and Replace- ON-VEHICLE REPAIR ................................. 25 J
ment .......................................................................... 5
Precaution for Assembly and Installation .................. 5 ENGINE ROOM COVER ................................... 25
Parts Requiring Angle Tightening ............................. 5 Removal and Installation .........................................25
Precaution for Liquid Gasket ..................................... 6 K
AIR CLEANER AND AIR DUCT ....................... 26
PREPARATION ............................................ 7 Exploded View .........................................................26
Removal and Installation .........................................26 L
PREPARATION ................................................... 7
Special Service Tool ................................................. 7 INTAKE MANIFOLD COLLECTOR .................. 27
Commercial Service Tool .......................................... 9 Exploded View .........................................................27
Removal and Installation .........................................27 M
FUNCTION DIAGNOSIS .............................. 12
INTAKE MANIFOLD ......................................... 30
NOISE, VIBRATION AND HARSHNESS Exploded View .........................................................30 N
(NVH) TROUBLESHOOTING ............................12 Removal and Installation .........................................30
NVH Troubleshooting - Engine Noise ..................... 12
Use the Chart Below to Help You Find the Cause EXHAUST MANIFOLD AND THREE WAY
of the Symptom ....................................................... 12 CATALYST ........................................................ 32 O
Exploded View .........................................................32
ON-VEHICLE MAINTENANCE .................... 14 Removal and Installation (Three Way Catalyst) ......32
Removal and Installation (Exhaust Manifold) ..........33 P
DRIVE BELTS ....................................................14
Exploded View ........................................................ 14 OIL PAN AND OIL STRAINER ......................... 36
Checking Drive Belts ............................................... 14 Exploded View .........................................................36
Adjustment .............................................................. 14 Removal and Installation .........................................36
Removal and Installation ......................................... 14
Drive Belt Auto Tensioner and Idler Pulley ............. 15 IGNITION COIL ................................................. 41
Exploded View .........................................................41

Revision: July 2009 EM-1 2010 Pathfinder

 Removal and Installation ........................................ 41 PRECAUTION ........................................... 139
ROCKER COVER .............................................. 42 PRECAUTIONS ................................................ 139
Exploded View ........................................................ 42 Precaution for Supplemental Restraint System
Removal and Installation ........................................ 42 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................... 139
FUEL INJECTOR AND FUEL TUBE ................. 46 Precaution Necessary for Steering Wheel Rota-
Exploded View ........................................................ 46
tion After Battery Disconnect ................................ 139
Removal and Installation ........................................ 46
Precaution for Drain Engine Coolant .................... 140
FRONT TIMING CHAIN CASE .......................... 51 Precaution for Disconnecting Fuel Piping ............. 140
Exploded View ........................................................ 51 Precaution for Removal and Disassembly ............ 140
Removal and Installation ........................................ 51 Precaution for Inspection, Repair and Replace-
ment ...................................................................... 140
TIMING CHAIN .................................................. 60 Precaution for Assembly and Installation .............. 140
Exploded View ........................................................ 60 Parts Requiring Angular Tightening ...................... 140
Removal and Installation ........................................ 60 Precaution for Liquid Gasket ................................. 141

REAR TIMING CHAIN CASE ............................ 68 PREPARATION ......................................... 142

Exploded View ........................................................ 68
Removal and Installation ........................................ 68 PREPARATION ................................................ 142
Special Service Tool ............................................. 142
CAMSHAFT ....................................................... 73 Commercial Service Tool ...................................... 144
Exploded View ........................................................ 73
Removal and Installation ........................................ 74 FUNCTION DIAGNOSIS ........................... 146
OIL SEAL ........................................................... 83 NOISE, VIBRATION, AND HARSHNESS
Removal and Installation of Valve Oil Seal ............. 83 (NVH) TROUBLESHOOTING ........................... 146
Removal and Installation of Front Oil Seal ............. 83 NVH Troubleshooting - Engine Noise ................... 146
Removal and Installation of Rear Oil Seal .............. 84 Use the Chart Below to Help You Find the Cause
of the Symptom ..................................................... 147
CYLINDER HEAD .............................................. 86
Exploded View ........................................................ 86 ON-VEHICLE MAINTENANCE ................. 149
Removal and Installation ........................................ 86
Exploded View ........................................................ 90 DRIVE BELTS .................................................. 149
Disassembly and Assembly .................................... 90 Exploded View ...................................................... 149
Inspection After Disassembly ................................. 92 Checking Drive Belts ............................................. 149
Adjustment ............................................................ 149
REMOVAL AND INSTALLATION ............... 97 Removal and Installation ....................................... 149
Drive Belt Auto Tensioner and Idler Pulley ........... 150
ENGINE ASSEMBLY ......................................... 97
Exploded View ........................................................ 97 AIR CLEANER FILTER .................................... 151
Removal and Installation ........................................ 97 Exploded View ...................................................... 151
Removal and Installation ....................................... 151
DISASSEMBLY AND ASSEMBLY ............ 101
SPARK PLUG ................................................... 152
ENGINE UNIT .................................................. 101 Exploded View ...................................................... 152
Exploded View .......................................................101 Removal and Installation ....................................... 152
Disassembly and Assembly ...................................102
Inspection After Disassembly ................................112 CAMSHAFT VALVE CLEARANCE ................. 154
Dowel Pin Alignment .............................................121 Valve Clearance .................................................... 154

HOW TO SELECT PISTON AND BEARING ... 123 COMPRESSION PRESSURE .......................... 159
How to Select Piston and Bearing .........................123 Compression Pressure ......................................... 159

SERVICE DATA AND SPECIFICATIONS ON-VEHICLE REPAIR .............................. 160

(SDS) .......................................................... 128 ENGINE ROOM COVER .................................. 160
SERVICE DATA AND SPECIFICATIONS Removal and Installation ....................................... 160
(SDS) ................................................................ 128 AIR CLEANER AND AIR DUCT ....................... 161
Standard and Limit ................................................128 Exploded View ...................................................... 161
VK56DE Removal and Installation ....................................... 161
Revision: July 2009 EM-2 2010 Pathfinder
INTAKE MANIFOLD ......................................... 162 OIL SEAL ........................................................ 200
Exploded View ...................................................... 162 Removal and Installation of Valve Oil Seal ............ 200 A
Removal and Installation ....................................... 162 Removal and Installation of Front Oil Seal ............ 200
Removal and Installation of Rear Oil Seal ............. 202
EXHAUST MANIFOLD AND THREE WAY
CATALYST ....................................................... 166 CYLINDER HEAD ........................................... 204 EM
Exploded View ...................................................... 166 Exploded View ....................................................... 204
Removal and Installation ....................................... 166 Removal and Installation ....................................... 204
Exploded View ....................................................... 206 C
OIL PAN AND OIL STRAINER ........................ 169 Disassembly and Assembly ................................... 206
Exploded View ...................................................... 169 Inspection After Disassembly ................................ 208
Removal and Installation ....................................... 169 D
REMOVAL AND INSTALLATION ............. 214
IGNITION COIL ................................................ 173
Exploded View ...................................................... 173 ENGINE ASSEMBLY ...................................... 214
Removal and Installation ....................................... 173 Exploded View ....................................................... 214 E
Removal and Installation ....................................... 214
ROCKER COVER ............................................. 174
Exploded View ...................................................... 174 DISASSEMBLY AND ASSEMBLY ............ 218 F
Removal and Installation ....................................... 174
ENGINE UNIT .................................................. 218
FUEL INJECTOR AND FUEL TUBE ............... 176 Exploded View ....................................................... 218
Exploded View ...................................................... 176 Disassembly and Assembly ................................... 219 G
Removal and Installation ....................................... 176 Inspection After Disassembly ................................ 226
TIMING CHAIN ................................................. 180 HOW TO SELECT PISTON AND BEARING .. 237
H
Exploded View ...................................................... 180 How to Select Piston and Bearing ......................... 237
Removal and Installation ....................................... 181
SERVICE DATA AND SPECIFICATIONS
CAMSHAFT ...................................................... 189 (SDS) .......................................................... 244 I
Exploded View ...................................................... 189
Removal and Installation ....................................... 189 SERVICE DATA AND SPECIFICATIONS
Inspection after Installation ................................... 198 (SDS) ............................................................... 244 J
Standard and Limit ................................................ 244

Revision: July 2009 EM-3 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VQ40DE]

PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000005531974

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005260419

NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.

Revision: July 2009 EM-4 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VQ40DE]
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.) A
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for Drain Engine Coolant INFOID:0000000005260420
EM
Drain engine coolant when engine is cooled.
Precaution for Disconnecting Fuel Piping INFOID:0000000005260421
C
• Before starting work, make sure no fire or spark producing items are in the work area.
• Release fuel pressure before disconnecting and disassembly.
• After disconnecting pipes, plug openings to stop fuel leakage. D

Precaution for Removal and Disassembly INFOID:0000000005260422

• When instructed to use special service tools, use the specified tools. Always be careful to work safely, avoid E
forceful or uninstructed operations.
• Exercise maximum care to avoid damage to mating or sliding surfaces.
• Cover openings of engine system with tape or equivalent, if necessary, to seal out foreign materials. F
• Mark and arrange disassembly parts in an organized way for easy troubleshooting and re-assembly.
• When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be used
in the step. G

Precaution for Inspection, Repair and Replacement INFOID:0000000005260423

H
Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precaution for Assembly and Installation INFOID:0000000005260424 I

• Use torque wrench to tighten bolts or nuts to specification.

• When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is specified, J
do exactly as specified.
• Replace with new gasket, packing, oil seal or O-ring.
• Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for K
any restriction and blockage.
• Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
L
• Release air within route when refilling after draining engine coolant.
• Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine stopped).
Then make sure that there are no leaks at fuel line connections.
• After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and M
exhaust gasses for leakage.
Parts Requiring Angle Tightening INFOID:0000000005260425
N
• For the final tightening of the following engine parts use Tool:

Tool number : KV10112100 (BT-8653-A) O

- Cylinder head bolts
- Lower cylinder block bolts
- Connecting rod cap bolts P
- Crankshaft pulley bolt (No angle wrench is required as bolt flange is provided with notches for angle tighten-
ing)
• Do not use a torque value for final tightening.
• The torque value for these parts are for a preliminary step.
• Ensure thread and seat surfaces are clean and coated with engine oil.

Revision: July 2009 EM-5 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VQ40DE]
Precaution for Liquid Gasket INFOID:0000000005260426

REMOVAL OF LIQUID GASKET SEALING

• After removing nuts and bolts, separate the mating surface and
remove old liquid gasket sealing using Tool.

Tool number : KV10111100 (J-37228)

CAUTION:
Be careful not to damage the mating surfaces.
• Tap seal cutter to insert it (1), and then slide it by tapping on the
side (2) as shown.
• In areas where Tool is difficult to use, use plastic hammer to lightly
tap the part, to remove it.
CAUTION: WBIA0566E

If for some unavoidable reason tool such as screwdriver is

used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.
• Remove liquid gasket completely from the groove of the gas-
ket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.

PBIC0003E

3. Attach liquid gasket tube to the Tool.

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
4. Apply the liquid gasket without breaks to the specified location
with the specified dimensions.

WBIA0567E

• If there is a groove for the liquid gasket application, apply the

liquid gasket to the groove.
• As for bolt holes, normally apply the liquid gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.
• Within five minutes of liquid gasket application, install the mat-
ing component.
• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
• Wait 30 minutes or more after installation, before refilling the
engine with engine oil and engine coolant.
SEM159F
CAUTION:
If there are specific instructions in this manual, observe them.

Revision: July 2009 EM-6 2010 Pathfinder

 PREPARATION
< PREPARATION > [VQ40DE]

PREPARATION A
PREPARATION
Special Service Tool INFOID:0000000005260427
EM
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.) C
Tool name
ST0501S000 Disassembling and assembling engine
( — ) D
Engine stand assembly
1. ST05011000
( — )
Engine stand E
2. ST05012000
( — )
Base NT042
F
— Removing fuel tube quick connectors in en-
(J-45488) gine room
Quick connector release (Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210) G

H
PBIC0198E

KV10111100 Removing oil pan (lower and upper), front and

(J-37228) rear timing chain case, etc.
I
Seal cutter

NT046

WS39930000 Pressing the tube of liquid gasket K

( — )
Tube presser

NT052 M
KV991J0050 Loosening or tightening air fuel ratio A/F sen-
(J-44626) sor
Air fuel sensor Socket a: 22 mm (0.87 in) N

O
LBIA0444E

KV10114400 Loosening or tightening heated oxygen sen-

(J-38365) sor 1 P
Heated oxygen sensor wrench a: 22 mm (0.87 in)

NT636

Revision: July 2009 EM-7 2010 Pathfinder

 PREPARATION
< PREPARATION > [VQ40DE]
Tool number Description
(Kent-Moore No.)
Tool name
KV10116200 Disassembling valve mechanism
(J-26336-B) Part (1) is a component of KV10116200 (J-
Valve spring compressor 26336-B), but Part (2) is not so.
1. KV10115900
(J-26336-20)
Attachment
2.KV10109220
( — )
Adapter PBIC1650E

KV10107902 Replacing valve oil seal

(J-38959)
Valve oil seal puller

NT011

— Installing valve oil seal

(J-39386)
Valve oil seal drift

NT024

EM03470000 Installing piston assembly into cylinder bore

(J-8037)
Piston ring compressor

NT044

KV10112100 Tightening bolts for bearing cap, cylinder

(BT-8653-A) head, etc. in angle
Angle wrench

NT014

ST16610001 Removing pilot converter

(J-23907)
Pilot bushing puller

NT045

Revision: July 2009 EM-8 2010 Pathfinder

 PREPARATION
< PREPARATION > [VQ40DE]
Tool number Description
(Kent-Moore No.) A
Tool name
— Installing rear main seal
1. (J-49815) EM
2. (J-8092)
Seal installer and driver handle

AWBIA0862ZZ

— Removing and installing crankshaft pulley D

(J-48761)
Ring gear stopper
E

ALBIA0523ZZ F

Commercial Service Tool INFOID:0000000005260428

G

Tool number
(Kent-Moore No.) Description H
Tool name
1. Crowfoot Installing exhaust manifold nuts
2. Torque wrench a: 14 mm (0.55 in)
I

S-NT360

( — ) Loosening nuts and bolts K

Power tool

PBIC0190E M
KV991J0100 Removing and installing flywheel
(J-46531) Size: T55
TORX socket
N

O
PBIC1113E

( — ) Removing and installing spark plug

Spark plug wrench P

NT047

Revision: July 2009 EM-9 2010 Pathfinder

 PREPARATION
< PREPARATION > [VQ40DE]
Tool number
(Kent-Moore No.) Description
Tool name
(J-24239-01) Loosening and tightening cylinder head bolt,
Cylinder head bolt wrench and used with angle wrench [SST:
KV10112100 (BT8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
NT583

( — ) Finishing valve seat dimensions

Valve seat cutter set

NT048

( — ) Removing and installing piston ring

Piston ring expander

NT030

( — ) Removing and installing valve guide

Valve guide drift Intake and Exhaust:
a: 9.5 mm (0.374 in) dia.
b: 5.5 mm (0.217 in) dia.

NT015

( — ) (1): Reaming valve guide inner hole

Valve guide reamer (2): Reaming hole for oversize valve guide
Intake and Exhaust:
d1: 6.0 mm (0.236 in) dia.
d2: 10.175 - 10.196 mm (0.4006 - 0.4014 in)
dia.

NT016

(J-43897-18) Reconditioning the exhaust system threads

(J-43897-12) before installing a new heated oxygen sensor
Oxygen sensor thread cleaner (Use with anti-seize lubricant shown below.)
a: J-43897-18 [18 mm (0.71 in) dia.] for zir-
conia heated oxygen sensor
b: J-43897-12 [12 mm (0.47 in) dia.] for tita-
nia heated oxygen sensor
AEM488

Revision: July 2009 EM-10 2010 Pathfinder

 PREPARATION
< PREPARATION > [VQ40DE]
Tool number
(Kent-Moore No.) Description A
Tool name
( — ) Lubricating oxygen sensor thread cleaning
Anti-seize lubricant (Permatex 133AR tool when reconditioning exhaust system EM
or equivalent meeting MIL specifica- threads
tion MIL-A-907)

AEM489

( — ) Removing and installing engine D

Manual lift table caddy

ZZA1210D F

Revision: July 2009 EM-11 2010 Pathfinder

 NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
< FUNCTION DIAGNOSIS > [VQ40DE]

FUNCTION DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine Noise INFOID:0000000005260429

PBIC2873E

Use the Chart Below to Help You Find the Cause of the Symptom INFOID:0000000005260430

1. Locate the area where noise occurs.

Revision: July 2009 EM-12 2010 Pathfinder
 NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
< FUNCTION DIAGNOSIS > [VQ40DE]
2. Confirm the type of noise.
3. Specify the operating condition of engine. A
4. Check specified noise source.
If necessary, repair or replace these parts.
EM
Operating condition of engine
Location Type of Before After When Source of Refer-
When When While Check item
of noise noise warm- warm- start- noise ence page C
idling racing driving
up up ing
Top of en- Ticking or Tappet
C A — A B — Valve clearance EM-19
gine clicking noise D
Rocker
cover Camshaft Camshaft runout
EM-74
Cylinder Rattle C A — A B C bearing Camshaft journal oil
EM-74
head noise clearance E
Piston to piston pin oil
Slap or Piston pin clearance EM-112
— A — B B —
knock noise Connecting rod bushing EM-112 F
oil clearance
Piston to cylinder bore
Crank- clearance
Piston ring side clear-
EM-112 G
shaft pul- Slap or Piston EM-112
ley A — — B B A ance
rap slap noise EM-112
Cylinder Piston ring end gap
EM-112
block Connecting rod bend H
(Side of and torsion
engine) Connect- Connecting rod bushing
Oil pan ing rod oil clearance EM-112
Knock A B C B B B I
bearing Connecting rod bearing EM-112
noise oil clearance
Main bearing oil clear-
Main bear- EM-112
Knock A B — A B C ance J
ing noise EM-112
Crankshaft runout
Timing
Front of Timing chain cracks
chain and K
engine Tapping or and wear EM-60
A A — B B B chain ten-
Timing ticking Timing chain tensioner EM-60
sioner
chain case operation
noise
Drive belts
L
Squeak-
(Sticking
ing or fizz- A B — B — C Drive belts deflection
or slip-
ing EM-14
ping) M
Front of Drive belts Idler pulley bearing op-
engine Creaking A B A B A B
(Slipping) eration
Water N
Squall
A B — B A B pump Water pump operation CO-22
Creak
noise
Rattle — — A — — — VTC VTC lock pin clearance EM-60
O
A: Closely related B: Related C: Sometimes related —: Not related

Revision: July 2009 EM-13 2010 Pathfinder

 DRIVE BELTS
< ON-VEHICLE MAINTENANCE > [VQ40DE]

ON-VEHICLE MAINTENANCE
DRIVE BELTS
Exploded View INFOID:0000000005260431

LBIA0427E

1. Drive belt 2. Power steering oil pump pulley 3. Generator pulley

4. Crankshaft pulley 5. A/C compressor 6. Cooling fan pulley
7. Idler pulley 8. Drive belt tensioner

Checking Drive Belts INFOID:0000000005260432

WARNING:
Be sure to perform when the engine is stopped.
1. Remove air duct and resonator assembly when inspecting drive belt. Refer to EM-26, "Removal and
Installation".
2. Make sure that the auto tensioner indicator is within the allow-
able working range (A) as shown.
3. Visually check entire belt for wear, damage or cracks.
4. If the indicator is out of the allowable range or drive belt is dam-
aged, replace the drive belt. Refer to EM-14, "Removal and
Installation".

AWBIA0723ZZ

Adjustment INFOID:0000000005260433

There is no manual drive belt tension adjustment. The drive belt tension is automatically adjusted by the drive
belt auto tensioner.
Removal and Installation INFOID:0000000005260434

REMOVAL
1. Remove the engine room cover. Refer to EM-25, "Removal and Installation".
2. Remove air duct and resonator assembly. Refer to EM-26, "Removal and Installation".

Revision: July 2009 EM-14 2010 Pathfinder

 DRIVE BELTS
< ON-VEHICLE MAINTENANCE > [VQ40DE]
3. Rotate the drive belt auto tensioner in the direction of arrow
(loosening direction of tensioner) as shown, using suitable tool. A
WARNING:
Avoid placing hand in a location where pinching may occur
if the tool accidentally comes off. EM
4. Remove the drive belt.

LBIA0428E

D
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys. E

Drive Belt Auto Tensioner and Idler Pulley INFOID:0000000005260435

F

AWBIA0861GB

L
1. Idler pulley 2. Drive belt auto tensioner

REMOVAL
M
1. Remove the engine room cover. Refer to EM-25, "Removal and Installation".
2. Remove air duct and resonator assembly. Refer to EM-26, "Removal and Installation".
3. Remove drive belt. Refer to EM-14, "Removal and Installation". N
4. Remove drive belt auto tensioner and idler pulley.
INSTALLATION
Installation is in the reverse order of removal. O

Revision: July 2009 EM-15 2010 Pathfinder

 AIR CLEANER FILTER
< ON-VEHICLE MAINTENANCE > [VQ40DE]
AIR CLEANER FILTER
Exploded View INFOID:0000000005260436

AWBIA0133GB

1. Air cleaner case (lower) 2. Air cleaner filter 3. Air cleaner case (upper)
4. Air duct and resonator Front

Removal and Installation INFOID:0000000005260437

REMOVAL
1. Unhook clips, and lift air cleaner case (upper).
2. Remove air cleaner filter.
INSTALLATION
Installation is in the reverse order of removal.

Revision: July 2009 EM-16 2010 Pathfinder

 SPARK PLUG
< ON-VEHICLE MAINTENANCE > [VQ40DE]
SPARK PLUG
A
Exploded View INFOID:0000000005260438

EM

G
PBIC2901E

1. Ignition coil 2. Spark plug

H
Removal and Installation INFOID:0000000005260439

REMOVAL I
1. Remove engine room cover. Refer to EM-25, "Removal and Installation".
2. Remove ignition coil. Refer to EM-41, "Removal and Installation".
3. Remove spark plug using suitable tool. J
CAUTION:
Do not drop or shock it.
K

M
SEM294A

INSPECTION AFTER REMOVAL

• Do not use a wire brush for cleaning. N

SMA773C

• If the spark plug tip is covered with carbon, a spark plug cleaner may be used.

Revision: July 2009 EM-17 2010 Pathfinder

 SPARK PLUG
< ON-VEHICLE MAINTENANCE > [VQ40DE]

Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/cm2, 85 psi)
Cleaning time : Less than 20 seconds
• Checking and adjusting spark plug gap is not required between
change intervals.

SMA806CA

INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not drop or shock spark plug.

Application United States and Canada Mexico

Make NGK
Standard type DILFR5A-11 PLFR5A-11
Gap (nominal) 1.1 mm (0.043 in)

Revision: July 2009 EM-18 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VQ40DE]
CAMSHAFT VALVE CLEARANCE
A
Valve Clearance INFOID:0000000005260440

INSPECTION EM
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or C
noise).
1. Remove the engine room cover. Refer to EM-25, "Removal and Installation".
2. Remove the air cleaner and air duct assembly. Refer to EM-26, "Exploded View". D
3. Remove rocker covers (RH and LH banks). Refer to EM-42, "Removal and Installation".
4. Measure the valve clearance as follows:
a. Set No. 1 cylinder at TDC of its compression stroke. E
• Rotate crankshaft pulley clockwise to align timing mark (A)
(grooved line without color) with timing indicator (B).
F

H
AWBIA0719ZZ

• Make sure that intake and exhaust cam noses on No. 1 cylin- I
der (engine front side of RH bank) are located as shown.
• If not, rotate crankshaft one revolution (360°) and align as
shown. J

SEM418G
L

b. Use feeler gauge, measure the clearance between valve lifter

and camshaft. M

SEM139D

Valve clearance: P
Unit: mm (in)

Cold Hot * (reference data)

Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)
*: Approximately 80°C (176°F)

Revision: July 2009 EM-19 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VQ40DE]
• Measure the valve clearances at locations marked “×” as
shown in the table below (locations indicated in the illustration)
with feeler gauge.
• No. 1 cylinder at compression TDC

Measuring position (RH bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.

No. 1 cylinder at EXH ×

compression TDC INT ×
Measuring position (LH bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.

No. 1 cylinder at INT ×

compression TDC EXH ×

PBIC2054E

c. Rotate crankshaft by 240° clockwise (when viewed from engine

front) to align No. 3 cylinder at TDC of its compression stroke.
NOTE:
Crankshaft pulley bolt flange has a stamped line every 60°. They
can be used as a guide to rotation angle.

PBIC2916E

• Measure the valve clearances at locations marked “×” as

shown in the table below (locations indicated in the illustration)
with feeler gauge.
• No. 3 cylinder at compression TDC

Measuring position (RH bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.

No. 3 cylinder at EXH ×

compression TDC INT ×
Measuring position (LH bank) No. 2 CYL. No. 4 CYL. No. 6 CYL.

No. 3 cylinder at INT ×

compression TDC EXH ×

PBIC2055E

Revision: July 2009 EM-20 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VQ40DE]
d. Rotate crankshaft by 240° clockwise (when viewed from engine
front) to align No. 5 cylinder at TDC of compression stroke. A

EM

PBIC2916E

D
• Measure the valve clearances at locations marked “×” as
shown in the table below (locations indicated in the illustration)
with feeler gauge. E
• No. 5 cylinder at compression TDC

Measuring position (RH bank) No. 1 CYL. No. 3 CYL. No. 5 CYL.
F
No. 5 cylinder at EXH ×
compression TDC INT ×
Measuring position (LH bank) No. 2 CYL. No. 4 CYL. No. 6 CYL. G
No. 5 cylinder at INT ×
compression TDC EXH ×
H

PBIC2056E
K
5. For the measured value out of the standard, perform adjustment.
ADJUSTMENT L
• Perform adjustment depending on selected head thickness of valve lifter.
1. Measure the valve clearance.
2. Remove camshaft. Refer to EM-74, "Removal and Installation". M
3. Remove valve lifters at the locations that are out of the standard.
4. Measure the center thickness of removed valve lifters with
micrometer. N

KBIA0057E

5. Use the equation below to calculate valve lifter thickness for replacement.

Revision: July 2009 EM-21 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VQ40DE]

Valve lifter thickness calculation: t = t1+ (C1– C2)

t = Valve lifter thickness to be replaced
t1 = Removed valve lifter thickness
C1 = Measured valve clearance
C2 = Standard valve clearance:
Intake : 0.26 - 0.34 mm (0.010 - 0.013 in)*
Exhaust : 0.29 - 0.37 mm (0.011 - 0.015 in)*
*: Approximately 20°C (68°F)
• Thickness of new valve lifter can be identified by stamp marks
on the reverse side (inside the cylinder).

KBIA0119E

Intake
Stamp mark Thickness
788U 7.88 mm (0.3102 in)
790U 7.90 mm (0.3110 in)
· ·
· ·
840U 8.40 mm (0.3307 in)
Available thickness of valve lifter: 27 sizes with range 7.88 to 8.40 mm (0.3102 to 0.3307 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to EM-128, "Standard and Limit".
Exhaust
Stamp mark Thickness
N788 7.88 mm (0.3102 in)
N790 7.90 mm (0.3110 in)
· ·
· ·
N836 8.36 mm (0.3291 in)
Available thickness of valve lifter: 25 sizes with range 7.88 to 8.36 mm (0.3102 to 0.3291 in) in steps of
0.02 mm (0.0008 in) (when manufactured at factory). Refer to EM-128, "Standard and Limit".
CAUTION:
Install identification letter at the end and top, “U” and “N”, at each of proper positions. (Be care-
ful of mis-installation between intake and exhaust.)
6. Install selected valve lifter.
7. Install camshaft. Refer to EM-74, "Removal and Installation".
8. Manually turn crankshaft pulley a few turns.
9. Make sure that the valve clearances for cold engine are within the specifications by referring to the speci-
fied values.
10. Installation of the remaining components is in the reverse order of removal.
11. Start the engine, and check for unusual noise and vibration.

Revision: July 2009 EM-22 2010 Pathfinder

 COMPRESSION PRESSURE
< ON-VEHICLE MAINTENANCE > [VQ40DE]
COMPRESSION PRESSURE
A
Compression Pressure INFOID:0000000005260441

CHECKING COMPRESSION PRESSURE EM

1. Warm up engine thoroughly.
2. Release fuel pressure. Refer to EC-495, "Fuel Pressure Check".
C
3. Disconnect fuel pump fuse to avoid fuel injection during mea-
surement.

F
BBIA0534E

4. Remove intake manifold collector. Refer to EM-27, "Removal and Installation".

5. Remove spark plug from each cylinder. Refer to EM-17, "Removal and Installation". G
6. Connect engine tachometer (not required in use of CONSULT-III).
7. Install compression tester with adapter onto spark plug hole.
H

PBIC0900E
K

• Use compression gauge whose pick up end inserted to spark

plug hole is smaller than 20 mm (0.79 in) in diameter. Other-
wise, it may be caught by cylinder head during removal. L

SBIA0533E

8. Turn ignition switch to “START” for cranking. When the gauge pointer stabilizes, read the compression O
pressure and engine rpm. Perform these steps to check each cylinder.
Compression pressure:
Unit: kPa (kg/cm2, psi) /rpm P

Standard Minimum Differential limit between cylinders

1,275 (13.0, 185) / 300 981 (10.0, 142) / 300 98 (1.0, 14) / 300
CAUTION:
Always use a fully charged battery to obtain specified engine speed.
• If the engine speed is out of the specified range, check the battery liquid for proper gravity. Check the
engine speed again with normal battery gravity.
Revision: July 2009 EM-23 2010 Pathfinder
 COMPRESSION PRESSURE
< ON-VEHICLE MAINTENANCE > [VQ40DE]
• If the compression pressure is below the minimum value, check the valve clearances and parts associ-
ated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head,
cylinder head gasket). After checking, measure the compression pressure again.
• If some cylinders have low compression pressure, pour a small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression.
• If the added engine oil improves the compression, piston rings may be worn out or damaged. Check the
piston rings and replace if necessary.
• If the compression pressure remains at low level despite the addition of engine oil, the valves may be
malfunctioning. Check the valves for damage. Replace the valve or valve seat accordingly.
• If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets may be leaking, or a valve in adjacent
cylinders may be damaged. Inspect and repair as required.
9. Install the components in the reverse order of removal.
10. Start the engine, and confirm that it runs smoothly.
11. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-89, "Description".

Revision: July 2009 EM-24 2010 Pathfinder

 ENGINE ROOM COVER
< ON-VEHICLE REPAIR > [VQ40DE]

ON-VEHICLE REPAIR A
ENGINE ROOM COVER
Removal and Installation INFOID:0000000005260442
EM
CAUTION:
Do not damage or scratch cover when installing or removing.
C
REMOVAL
1. Remove the engine room cover bolts using power tool.
2. Lift up on engine cover firmly to dislodge snap fit mounts. D

WBIA0622E

INSTALLATION G
Installation is in the reverse order of removal.

Revision: July 2009 EM-25 2010 Pathfinder

 AIR CLEANER AND AIR DUCT
< ON-VEHICLE REPAIR > [VQ40DE]
AIR CLEANER AND AIR DUCT
Exploded View INFOID:0000000005260443

AWBIA0133GB

1. Air cleaner case (lower) 2. Air cleaner filter 3. Air cleaner case (upper)
4. Air duct and resonator assembly Front

Removal and Installation INFOID:0000000005260444

CAUTION:
Handle mass air flow sensor with care.
• Do not shock it.
• Do not disassemble it.
• Do not touch its sensor.
NOTE:
Add marks as necessary for easier installation.
REMOVAL
1. Remove the engine room cover using power tool. Refer to EM-160, "Removal and Installation".
2. Disconnect the harness connector from air cleaner case (upper).
3. Remove the air duct and resonator assembly and air cleaner case (upper).
4. Remove air cleaner filter and air cleaner case (lower).
INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for cracks or tears.
• If anything found, replace air duct and resonator assembly.
INSTALLATION
Installation is in the reverse order of removal.

Revision: July 2009 EM-26 2010 Pathfinder

 INTAKE MANIFOLD COLLECTOR
< ON-VEHICLE REPAIR > [VQ40DE]
INTAKE MANIFOLD COLLECTOR
A
Exploded View INFOID:0000000005260445

EM

I
WBIA0731E

1. Vacuum tank 2. VIAS control solenoid valve 3. Vacuum hose J

4. Intake manifold collector support 5. Water hose 6. Electric throttle control actuator
7. Water hose 8. EVAP hose 9. Bracket
10. EVAP hose 11. EVAP canister purge volume control 12. Gasket K
solenoid valve
13. Gasket 14. Intake manifold collector 15. Clip
16. PCV hose 17. Connector 18. PCV hose L
a. To intake manifold collector b. To power valve c. To throttle body
d. To cylinder head (RH bank)
M
Removal and Installation INFOID:0000000005260446

REMOVAL
N
1. Remove the engine under cover. Refer to EXT-14, "Removal and Installation".
2. Remove engine room cover. Refer to EM-25, "Removal and Installation".
3. Remove air duct and resonator assembly. Refer to EM-26, "Removal and Installation". O
4. Remove electric throttle control actuator as follows:
a. Partially drain engine coolant. Refer to CO-12, "Changing Engine Coolant".
WARNING: P
To avoid the danger of being scalded, never drain engine coolant when engine is hot.
CAUTION:
• Perform when engine is cold.
• Do not spill engine coolant on drive belt.
b. Disconnect water hoses from electric throttle control actuator.
c. Disconnect harness connector.

Revision: July 2009 EM-27 2010 Pathfinder

 INTAKE MANIFOLD COLLECTOR
< ON-VEHICLE REPAIR > [VQ40DE]
d. Loosen bolts in reverse order as shown.
CAUTION:
• Handle carefully to avoid any shock to electric throttle
control actuator.
• Do not disassemble.

PBIC2875E

5. Remove the following parts:

• Vacuum hose (to brake booster)
• PCV hose
6. Loosen bolts in reverse order as shown to remove intake mani-
fold collector support.

PBIC2876E

7. Disconnect EVAP hoses and harness connector from EVAP canister purge volume control solenoid valve.
8. Remove EVAP canister purge volume control solenoid valve.
9. Remove VIAS control solenoid valve and vacuum tank.
• Add mating marks as necessary for easier installation.
10. Loosen nuts and bolts in reverse order as shown with power
tool, and remove intake manifold collector.
CAUTION:
Cover engine openings to avoid entry of foreign materials.

PBIC2877E

INSTALLATION
Installation is in the reverse order of removal. Note the following:
Intake Manifold Collector
• If stud bolts were removed from intake manifold, install them and tighten to the specified torque.
• Tighten nuts and bolts in numerical order as shown.

Intake manifold collector : 11.0 N·m (1.1 kg-m, 8 ft-lb)

bolts and nuts

Stud bolts : 6.9 N·m (7.0kg-m, 61 in-lb)

PBIC2877E

Revision: July 2009 EM-28 2010 Pathfinder

 INTAKE MANIFOLD COLLECTOR
< ON-VEHICLE REPAIR > [VQ40DE]
Electric Throttle Control Actuator
• Tighten bolts in numerical order as shown. A
• Perform the “Throttle Valve Closed Position Learning” when har-
ness connector of electric throttle control actuator is disconnected.
Refer to EC-25, "Throttle Valve Closed Position Learning".
EM
• Perform the “Idle Air Volume Learning” and “Throttle Valve Closed
Position Learning” when electric throttle control actuator is
replaced. Refer to EC-25, "Idle Air Volume Learning".
C

PBIC2875E D

Revision: July 2009 EM-29 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VQ40DE]
INTAKE MANIFOLD
Exploded View INFOID:0000000005260447

PBIC2878E

1. Intake manifold 2. Gasket

Removal and Installation INFOID:0000000005260448

REMOVAL
1. Release fuel pressure. Refer to EC-495, "Fuel Pressure Check".
2. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
3. Remove fuel tube and fuel injector assembly. Refer to EM-46, "Removal and Installation".
4. Loosen nuts and bolts with power tool in reverse order as shown
to remove intake manifold.

PBIC2879E

5. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Revision: July 2009 EM-30 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VQ40DE]
• Check the surface distortion of the intake manifold mating surface
with straightedge and feeler gauge. A

Limit : 0.1 mm (0.004 in)

• If it exceeds the limit, replace intake manifold. EM

PBIC0870E

D
INSTALLATION
Installation is in the reverse order of removal. Note the following:
Intake Manifold E
• If stud bolts were removed from cylinder head, install them and tighten to the specified torque.

Intake manifold studs : 11.0 N·m (1.1kg-m, 8 ft-lb)

F
• Tighten all nuts and bolts to the specified torque in two or more
steps in numerical order as shown.
G
Intake manifold bolt and nuts
1st step : 7.4 N·m (0.75 kg-m, 65 in-lb)
2nd step and after : 29.0 N·m (3.0 kg-m, 21 ft-lb) H

I
PBIC2879E

Revision: July 2009 EM-31 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VQ40DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded View INFOID:0000000005260449

ALBIA0654GB

1. Cylinder head (LH) 2. Cylinder head (RH) 3. Exhaust manifold studs (RH)
4. Gasket 5. Exhaust manifold nuts (RH) 6. Exhaust manifold (RH)
7. Exhaust manifold cover (RH) 8. Three way catalyst (RH) 9. Three way catalyst studs (RH)
10. Seal ring 11. Three way catalyst nuts (RH) 12. Three way catalyst nuts (LH)
13. Seal ring 14. Three way catalyst studs (LH) 15. Three way catalyst (LH)
16. Exhaust manifold cover (LH) 17. Exhaust manifold (LH) 18. Exhaust manifold nuts (LH)
19. Gasket 20. Exhaust manifold studs (LH)

Removal and Installation (Three Way Catalyst) INFOID:0000000005568713

WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
REMOVAL
1. Remove the front wheel and tire. Refer to WT-49, "Rotation".
2. Remove the front fender protector. Refer toEXT-23, "Removal and Installation of Front Fender Protector".
3. Remove the exhaust manifold cover bolts.
4. Remove the center exhaust tube, main muffler and front exhaust tube. Refer to EX-6, "Exploded View".
5. Disconnect the air fuel ratio sensor 1 harness connector.
6. Remove the three way catalyst nuts and remove the three way catalyst.
7. Remove the air fuel ratio sensor 1 using Tool, if necessary.

Revision: July 2009 EM-32 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VQ40DE]

Tool number : KV991J0050 (J-44626) A

CAUTION:
• Be careful not to damage air fuel ratio sensor 1.
• Discard any air fuel ratio sensor 1 which has been dropped from a height of more than 0.5 m EM
(19.7 in) onto a hard surface such as a concrete floor; replace with a new sensor.
INSTALLATION
Installation is in the reverse order of removal. C
• Tighten air fuel ratio sensor 1 to specification, if removed.

Air fuel ratio sensor : 50.0 N·m (5.1 kg-m, 37 ft-lb) D

CAUTION:
• Do not over tighten air fuel ratio sensor 1. Doing so may cause damage to air fuel ratio sensor 1,
resulting in the “MIL” coming on. E
• Before installing a new air fuel ratio sensor 1, clean exhaust system threads using oxygen sensor
thread cleaner and apply anti-seize lubricant.
F
Oxygen sensor thread cleaner : — (J-43897-12)
Oxygen sensor thread cleaner : — (J-43897 18)
G
Removal and Installation (Exhaust Manifold) INFOID:0000000005260450

REMOVAL (LH)
H
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Remove engine room cover. Refer to EM-25, "Removal and Installation".
I
2. Remove air cleaner case (upper) and air duct and resonator assembly. Refer to EM-26, "Removal and
Installation".
3. Remove engine under cover. Refer to EXT-14, "Removal and Installation". J
4. Partially drain engine coolant. Refer to CO-12, "Changing Engine Coolant".
5. Remove three way catalyst (LH). Refer to EM-32, "Removal and Installation (Three Way Catalyst)".
6. Remove exhaust manifold cover (LH). K
7. Remove oil level gauge and oil level gauge guide. Refer to EM-36, "Exploded View".
8. Disconnect water hoses at heater pipe. Refer to CO-29, "Exploded View".
9. Remove heater pipe from cylinder head (LH). Refer to CO-29, "Exploded View". L
10. Loosen nuts in reverse order as shown.
• : Front
NOTE: M
Disregard the numerical order No. 7 and 8 in removal.

O
AWBIA0725ZZ

11. Remove exhaust manifold (LH). P

12. Remove gaskets.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
Surface Distortion

Revision: July 2009 EM-33 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VQ40DE]
• Check the surface distortion of the exhaust manifold mating sur-
face with straightedge and feeler gauge.

Limit : 0.3 mm (0.012 in)

• If it exceeds the limit, replace exhaust manifold.

PBIC1096E

INSTALLATION (LH)
Installation is in the reverse order of removal.
Exhaust Manifold Gasket
Install the exhaust manifold gasket in direction as shown.
• : Front
• A: Identification hole

AWBIA0726ZZ

Exhaust Manifold
• If exhaust manifold studs were removed, install them and tighten to specification.
• Install exhaust manifold and tighten nuts in numerical order as
shown.
CAUTION:
Use new exhaust manifold nuts for installation.
NOTE:
Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7
and 8 show second step.
- : Front

AWBIA0725ZZ

REMOVAL (RH)
1. Remove three way catalyst (RH). Refer to EM-32, "Removal and Installation (Three Way Catalyst)".
2. Remove heat shield from lower dash panel.
3. Remove support bolts from A/T fluid charging pipe. Refer to TM-194, "4WD : Exploded View".
4. Loosen nuts in reverse order as shown.
• : Front
NOTE:
Disregard the numerical order No. 7 and 8 in removal.

AWBIA0727ZZ

5. Remove exhaust manifold (RH) and exhaust manifold cover (RH) together.
6. Remove gaskets.
Revision: July 2009 EM-34 2010 Pathfinder
 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VQ40DE]
CAUTION:
Cover engine openings to avoid entry of foreign materials. A
INSPECTION AFTER REMOVAL
Surface Distortion EM
• Check the surface distortion of the exhaust manifold mating sur-
face with straightedge and feeler gauge.

Limit : 0.3 mm (0.012 in) C

• If it exceeds the limit, replace exhaust manifold.

D

E
PBIC1096E

INSTALLATION (RH)
Installation is in the reverse order of removal. F
NOTE:
If necessary, a crowfoot may be used to tighten the exhaust manifold nuts.
Exhaust Manifold Gasket G
Install the exhaust manifold gasket in direction as shown.
• : Front
• A: Identification hole H

J
AWBIA0728ZZ

Exhaust Manifold
• If exhaust manifold studs were removed, install them and tighten to specification. K
• Install exhaust manifold and tighten nuts in numerical order as
shown.
CAUTION: L
Use new exhaust manifold nuts for installation.
NOTE:
Tighten nuts No. 1 and 2 in two steps. The numerical order No. 7
and 8 show second step. M
- : Front

N
AWBIA0727ZZ

Revision: July 2009 EM-35 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VQ40DE]
OIL PAN AND OIL STRAINER
Exploded View INFOID:0000000005260451

PBIC2883E

1. Oil pan (upper) 2. Oil pressure switch 3. O-ring

4. Relief valve 5. O-ring 6. Oil cooler
7. Connector bolt 8. Oil filter 9. Drain plug
10. Drain plug washer 11. Oil pan (lower) 12. Rear cover plate
13. Oil strainer 14 O-ring 15. Oil level gauge guide
16. Oil level gauge

Removal and Installation INFOID:0000000005260452

REMOVAL (LOWER)
WARNING:
To avoid the danger of being scalded, do not drain engine oil when engine is hot.
1. Drain engine oil. Refer to LU-9, "Changing Engine Oil".
2. Remove the oil pan (lower) using the following steps.

Revision: July 2009 EM-36 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VQ40DE]
a. Remove the oil pan (lower) bolts using power tool in reverse
order as shown. A

EM

PBIC2890E

D
b. Insert Tool between the oil pan (lower) and the oil pan (upper).

Tool number : KV10111100 (J-37228) E

CAUTION:
• Be careful not to damage the mating surfaces.
• Do not insert screwdriver, this will damage the mating F
surfaces.
NOTE:
Tap (1) Tool to insert it and then slide (2) it by tapping on the side
of the Tool as shown. G
WBIA0566E

INSPECTION AFTER REMOVAL

Clean oil strainer if any object attached. H

INSTALLATION (LOWER)
1. Install oil pan (lower) as follows: I
a. Use scraper to remove old liquid gasket from mating surfaces.
• Also remove old liquid gasket from mating surface of oil pan
(upper). J
• Remove old liquid gasket from the bolt holes and thread.
CAUTION:
Do not scratch or damage the mating surfaces when clean-
ing off old liquid gasket. K

L
PBIC2888E

b. Apply a continuous bead of liquid gasket using Tool to the oil M

pan (lower) as shown.

Tool number : WS39930000 ( — )

N
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
CAUTION:
Attaching should be done within 5 minutes after coating. O

PBIC2889E
P
c. Install oil pan (lower).

Revision: July 2009 EM-37 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VQ40DE]
• Tighten oil pan (lower) bolts in numerical order as shown.

PBIC2890E

2. Install oil pan drain plug. Refer to EM-36, "Removal and Installation".
3. After 30 minutes fill with engine oil and inspect for leaks. Refer to LU-9, "Changing Engine Oil".
CAUTION:
Do not fill the engine with oil for at least 30 minutes after oil pan is installed.
INSPECTION AFTER INSTALLATION
1. Start engine, and check for leaks of engine oil.
2. Stop engine and wait for 10 minutes.
3. Check engine oil level. Refer to LU-8, "Inspection".
REMOVAL (UPPER)
WARNING:
To avoid the danger of being scalded, do not drain engine oil when engine is hot.
CAUTION:
• Perform this procedure when engine is cold.
• Do not spill engine oil on drive belts.
• Do not spill engine coolant on drive belts.
1. Remove engine under covers (front) and (rear). Refer to EXT-14, "Removal and Installation".
2. Drain engine oil. Refer to LU-9, "Changing Engine Oil".
3. Drain engine coolant. Refer to CO-12, "Changing Engine Coolant".
4. Remove oil level gauge and oil level gauge guide.
5. Remove front final drive (4WD models). Refer to DLN-353, "Removal and Installation".
6. Remove front frame crossmember.
7. Disconnect steering gear lower joint shaft bolt and steering gear nuts and bolts, position out of the way.
Refer to ST-22, "Removal and Installation".
8. Remove stabilizer bar brackets and position stabilizer bar out of the way. Refer to FSU-13, "Component".
9. Disconnect A/T fluid cooler tube brackets and position out of the way. Refer to TM-191, "2WD : Exploded
View" (2WD models), TM-194, "4WD : Exploded View" (4WD models).
10. Remove oil filter, if necessary. Refer to LU-11, "Removal and Installation".
11. Disconnect oil cooler hoses and remove oil cooler, if necessary. Refer to LU-12, "Removal and Installa-
tion".
12. Disconnect oil pressure switch and remove, if necessary.
13. Remove oil pan (lower).
14. Remove oil strainer.
15. Remove transmission joint bolts which pierce oil pan (upper). Refer to TM-191, "2WD : Exploded View"
(2WD models), TM-194, "4WD : Exploded View" (4WD models).
16. Remove rear cover plate.

Revision: July 2009 EM-38 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VQ40DE]
17. Loosen oil pan (upper) bolts with power tool in reverse order as
shown. A

EM

PBIC2887E

D
• Insert Tool between oil pan (upper) and lower cylinder block.
Tap (1) Tool to insert it and then slide (2) it by tapping on the
side as shown. E

Tool number : KV10111100 (J-37228)

CAUTION: F
Be careful not to damage mating surfaces.

G
WBIA0566E

18. Remove O-rings from bottom of lower cylinder block and oil H
pump.

PBIC2885E K
INSPECTION AFTER REMOVAL
Clean oil strainer if any object attached.
L
INSTALLATION (UPPER)
1. Install oil pan (upper) as follows:
a. Use scraper to remove old liquid gasket from mating surfaces. M
• Also remove the old liquid gasket from mating surface of lower
cylinder block.
• Remove old liquid gasket from the bolt holes and threads. N
CAUTION:
Do not scratch or damage the mating surfaces when clean-
ing off old liquid gasket.
O

PBIC2884E P

Revision: July 2009 EM-39 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VQ40DE]
b. Install new O-rings on the bottom of lower cylinder block and oil
pump.

PBIC2885E

c. Apply a continuous bead of liquid gasket using Tool to the lower

cylinder block mating surfaces of oil pan (upper) as shown.

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
CAUTION:
• For bolt holes with mark, apply liquid gasket outside
the hole.
• Apply a bead of 4.5 to 5.5 mm (0.177 to 0.217 in) in diame-
ter to area (A). PBIC2886E

• Attaching should be done within 5 minutes after coating.

d. Install oil pan (upper).

CAUTION:
Install avoiding misalignment of both oil pan gaskets and O-rings.
• Tighten oil pan (upper) bolts in numerical order as shown.
• There are two types of bolts.

M8 × 100 mm (3.97 in) : 7, 11, 12, 13

M8 × 25 mm (0.98 in) : Except the above

PBIC2887E

e. Tighten transmission joint bolts. Refer to TM-191, "2WD : Exploded View" (2WD models), TM-194, "4WD
: Exploded View" (4WD models).
2. Install oil strainer to oil pan (upper).
3. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
1. Check engine oil level and adjust as needed. Refer to LU-8, "Inspection".
2. Start engine, and check for leaks of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level again. Refer to LU-8, "Inspection".

Revision: July 2009 EM-40 2010 Pathfinder

 IGNITION COIL
< ON-VEHICLE REPAIR > [VQ40DE]
IGNITION COIL
A
Exploded View INFOID:0000000005260453

EM

G
PBIC2901E

1. Ignition coil 2. Spark plug

H
Removal and Installation INFOID:0000000005260454

REMOVAL (LH) I
1. Remove engine room cover. Refer to EM-25, "Removal and Installation".
2. Move aside harness, harness bracket, and hoses located above ignition coil.
3. Disconnect the harness connector from the ignition coil. J
4. Remove the ignition coil.
CAUTION:
Do not shock ignition coil. K

INSTALLATION (LH)
Installation is in the reverse order of removal.
L
REMOVAL (RH)
1. Remove intake manifold collector. Refer to EM-27, "Removal and Installation".
2. Move aside harness, harness bracket, and hoses located above ignition coil. M
3. Disconnect the harness connector from the ignition coil.
4. Remove the ignition coil.
CAUTION: N
Do not shock ignition coil.
INSTALLATION (RH)
O
Installation is in the reverse order of removal.

Revision: July 2009 EM-41 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VQ40DE]
ROCKER COVER
Exploded View INFOID:0000000005260455

PBIC2905E

1. Oil filler cap 2. PCV hose 3. PCV valve

4. O-ring 5. Rocker cover (RH) 6. PCV hose
7. Rocker cover gasket (RH) 8. Rocker cover gasket (LH) 9. Rocker cover (LH)
10. PCV hose

Removal and Installation INFOID:0000000005260456

REMOVAL (LH)
1. Remove the engine room cover. Refer to EM-25, "Removal and Installation".
2. Remove air duct and resonator assembly. Refer to EM-26, "Exploded View".
3. Separate engine harness removing their brackets from rocker covers.
4. Remove harness bracket from cylinder head, if necessary.
5. Disconnect and remove the intake valve timing control solenoid valve (LH bank). Refer to EM-73,
"Exploded View".
6. Remove the ignition coils. Refer to EM-41, "Removal and Installation".
7. Remove the PCV hoses from rocker covers.
8. Remove the oil filler cap from rocker cover (LH), if necessary.

Revision: July 2009 EM-42 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VQ40DE]
9. Loosen the rocker cover bolts with power tool in reverse order
as shown. A
• : Front

EM

AWBIA0729ZZ

D
10. Remove rocker cover gaskets from rocker covers.
11. Use scraper to remove all traces of liquid gasket from cylinder head and camshaft bracket (No. 1).
CAUTION: E
Do not scratch or damage the mating surface when cleaning off old liquid gasket.
INSTALLATION (LH)
1. Apply liquid gasket using Tool to joint part among rocker cover, F
cylinder head and camshaft bracket (No. 1) as follows:

Tool number : WS39930000 ( — ) G

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
NOTE: H
The figure shows an example of LH side [zoomed in shows
camshaft bracket (No. 1)].
a. Apply liquid gasket to joint part of camshaft bracket (a) (No. 1) I
and cylinder head.
b. Apply liquid gasket (b) to the figure (a) squarely.
J

PBIC2474E

M
2. Install new rocker cover gasket to rocker cover.
3. Install the rocker cover.
• Check to be sure rocker cover gasket is not dropped from installation groove of rocker cover.
N
4. Tighten the rocker cover bolts in two steps in numerical order as
shown.
• : Front
O
1st step : 1.96 N·m (0.20 kg-m, 17 in-lb)
2nd step : 8.33 N·m (0.85 kg-m, 74 in-lb)
P

AWBIA0729ZZ

5. Install the oil filler cap to rocker cover (LH), if removed.

6. Install the PCV hose.

Revision: July 2009 EM-43 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VQ40DE]
• Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end.
• When installing, be careful not to twist or come in contact with other parts.
7. Installation of the remaining components is in the reverse order of removal.
• Check engine oil level and adjust as necessary. Refer to LU-8, "Inspection".

REMOVAL (RH)
1. Remove the intake manifold collector. Refer to EM-27, "Removal and Installation".
CAUTION:
Perform this step when engine is cold.
2. Separate engine harness removing their brackets from rocker covers.
3. Remove harness bracket from cylinder head (RH). Refer to EM-86, "Removal and Installation".
4. Disconnect and remove the intake valve timing control solenoid valve (RH bank). Refer to EM-73,
"Exploded View".
5. Remove the ignition coils. Refer to EM-41, "Removal and Installation".
6. Remove the PCV hoses from rocker cover.
7. Remove the PCV valve and O-ring from rocker cover (RH), if necessary.
8. Loosen the rocker cover bolts with power tool in reverse order
as shown.
• : Front

AWBIA0730ZZ

9. Remove rocker cover gaskets from rocker covers.

10. Use scraper to remove all traces of liquid gasket from cylinder head and camshaft bracket (No. 1).
CAUTION:
Do not scratch or damage the mating surface when cleaning off old liquid gasket.
INSTALLATION (RH)
1. Apply liquid gasket using Tool to joint part among rocker cover,
cylinder head and camshaft bracket (No. 1) as follows:

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
NOTE:
The figure shows an example of LH side [zoomed in shows
camshaft bracket (No. 1)].
a. Apply liquid gasket to joint part of camshaft bracket (a) (No. 1)
and cylinder head.
b. Apply liquid gasket (b) to the figure (a) squarely.

PBIC2474E

Revision: July 2009 EM-44 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VQ40DE]
2. Install new rocker cover gasket to rocker cover.
3. Install the rocker cover. A
• Check to be sure rocker cover gasket is not dropped from installation groove of rocker cover.
4. Tighten the rocker cover bolts in two steps in numerical order as
shown. EM
• : Front

1st step : 1.96 N·m (0.20 kg-m, 17 in-lb) C

2nd step : 8.33 N·m (0.85 kg-m, 74 in-lb)

AWBIA0730ZZ
E
5. Install new O-ring and PCV valve to rocker cover (RH), if removed.
6. Install the PCV hose.
• Insert PCV hose by 25 to 30 mm (0.98 to 1.18 in) from connector end. F
• When installing, be careful not to twist or come in contact with other parts.
7. Installation of the remaining components is in the reverse order of removal.
G

Revision: July 2009 EM-45 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VQ40DE]
FUEL INJECTOR AND FUEL TUBE
Exploded View INFOID:0000000005260457

PBIC2957E

1. Fuel tube (RH) 2. O-ring 3. Fuel tube (LH)

4. Clip 5. O-ring (blue) 6. Fuel injector
7. O-ring (brown) 8. O-ring 9. Spacer
10. Fuel damper 11. Fuel damper cap 12. Quick connector cap
13. Fuel feed hose

Removal and Installation INFOID:0000000005260458

CAUTION:
Do not remove or disassemble parts unless instructed as shown.
REMOVAL
WARNING:
• Put a “CAUTION FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
• To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
1. Release the fuel pressure. Refer to EC-495, "Fuel Pressure Check".
2. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
3. Remove the intake manifold collector. Refer to EM-27, "Removal and Installation".
CAUTION:
Perform this step when engine is cold.

Revision: July 2009 EM-46 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VQ40DE]
4. Disconnect the fuel quick connector on the engine side.
a. Remove quick connector cap. A

EM

LBIA0090E

D
b. With the sleeve side of Tool facing quick connector, install Tool
onto fuel tube.
E
Tool number : — (J-45488)
c. Insert Tool into quick connector until sleeve contacts and goes
no further. Hold the Tool on that position. F
CAUTION:
Inserting the Tool hard will not disconnect quick connector.
Hold Tool where it contacts and goes no further.
G
d. Pull the quick connector straight out from the fuel tube. WBIA0295E
CAUTION:
• Pull quick connector holding it at the (A) position, as shown.
• Do not pull with lateral force applied. O-ring inside quick connector may be damaged. H
• Prepare container and cloth beforehand as fuel will leak out.
• Avoid fire and sparks.
• Be sure to cover openings of disconnected pipes with I
plug or plastic bag to avoid fuel leakage and entry of for-
eign materials.
J

PBIC1899E L

5. Remove PCV hose between rocker covers (right and left banks).
6. Disconnect harness connector from fuel injector. M
7. Loosen bolts in reverse order as shown, and remove fuel tube
and fuel injector assembly.
CAUTION:
N
Do not tilt it, or remaining fuel in pipes may flow out from
pipes.

P
PBIC2902E

8. Remove bolts which connects fuel tube (RH) and fuel tube (LH).

Revision: July 2009 EM-47 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VQ40DE]
9. Remove fuel injector from fuel tube as follows:
a. Carefully open and remove clip.
b. Remove fuel injector from fuel tube by pulling straight.
CAUTION:
• Be careful with remaining fuel that may leak out from fuel
tube.
• Do not damage injector nozzles during removal.
• Do not bump or drop fuel injectors.
• Do not disassemble fuel injectors.

PBIC2999E

10. Disconnect fuel tube (RH) from fuel tube (LH).

11. Loosen bolts, to remove fuel damper cap and fuel damper, if necessary.
INSTALLATION
1. Install fuel damper as follows:
a. Install new O-ring to fuel tube as shown.
• When handling new O-rings, be careful of the following cau-
tion:
CAUTION:
• Handle O-ring with bare hands. Never wear gloves.
• Lubricate new O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of for-
eign material.
• When installing O-ring, do not scratch it with tool or fin-
gernails.
• Do not twist or stretch O-ring. If O-ring was stretched
while it was being attached, allow it to retract before
inserting it into fuel tube.
• Insert new O-ring straight into fuel tube. Do not angle or
twist it.
b. Install spacer to fuel damper.
c. Insert fuel damper straight into fuel tube.
CAUTION:
• Insert straight, making sure that the axis is lined up.
• Do not pressure-fit with excessive force.
PBIC2903E

Reference value : 130 N (13.3 kg, 29.2 lb)

• Insert fuel damper until (B) is touching (A) of fuel tube.
d. Tighten bolts evenly in turn.
• After tightening bolts, make sure that there is no gap between fuel damper cap and fuel tube.
2. Install new O-rings to fuel injector, paying attention to the following.
CAUTION:
• Do not reuse O-rings.
• Upper and lower O-ring are different colors.
Revision: July 2009 EM-48 2010 Pathfinder
 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VQ40DE]

Fuel tube side : Blue A

Nozzle side : Brown
• Handle O-ring with bare hands. Never wear gloves.
• Lubricate new O-ring with new engine oil. EM
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of foreign material.
• When installing O-ring, be careful not to scratch it with tool or fingernails. C
• Do not twist or stretch O-ring. If O-ring was stretched while it was being attached, allow it to
retract before inserting it into fuel tube.
• Insert O-ring straight into fuel injector. Do not angle or twist it.
D
3. Install fuel injector to fuel tube.
a. Insert clip into clip mounting groove on the fuel injector.
• Insert new clip so that protrusion of fuel injector matches cut-
E
out of clip.
CAUTION:
• Do not reuse clip. Replace it with a new one.
• Do not allow the clip to interfere with the O-ring. If inter- F
ference occurs, replace O-ring.
b. Insert the fuel injector into the fuel tube with the clip attached.
• Insert it while matching it to the axial center. G
• Insert fuel injector so that protrusion of fuel tube matches cut-
out of clip.
• Make sure that fuel tube flange is securely fixed in flange fixing
groove on clip. H
c. Make sure that the installation is complete by checking that the
fuel injector does not rotate or come off.
• Make sure that protrusions of the fuel injectors are aligned I
with cutouts of clips after installation.

PBIC3000E

K
4. Connect the fuel tube (RH) to the fuel tube (LH), and tighten bolts temporarily.
• Tighten bolts to the specified torque after installing fuel tube and fuel injector assembly.
CAUTION:
L
• Handle O-ring with bare hands. Do not wear gloves.
• Lubricate O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of foreign material. M
• When installing O-ring, be careful not to scratch it with tool or fingernails.
• Do not twist or stretch O-ring. If O-ring was stretched while it was being attached, allow it to
retract before inserting it into fuel tube. N
• Insert new O-ring straight into fuel tube. Do not angle or twist it.
5. Install fuel tube and fuel injector assembly to intake manifold.
CAUTION:
Do not let the tip of the injector nozzle come in contact with other parts. O

Revision: July 2009 EM-49 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VQ40DE]
• Tighten bolts in two steps in numerical order as shown.

Fuel injector tube assembly bolts

1st step : 10.1 N·m (1.0 kg-m, 7 ft-lb)
2nd step : 22.0 N·m (2.2 kg-m, 16 ft-lb)

PBIC2902E

6. Tighten bolts which connects fuel tube (RH) and fuel tube (LH) to the specified torque.
7. Connect fuel injector harness connector.
8. Install intake manifold collector. Refer to EM-27, "Removal and Installation".
9. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
After installing the fuel tubes, make sure there are no fuel leaks at the connections using the following steps.
1. Apply fuel pressure to the fuel lines by turning ignition switch ON (with engine stopped). Then check for
fuel leaks at the connections.
2. Start the engine and rev it up and check for fuel leaks at the connections.
WARNING:
Do not touch engine immediately after stopping, as engine becomes extremely hot.
NOTE:
Use mirrors for checking on hidden points.

Revision: July 2009 EM-50 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
FRONT TIMING CHAIN CASE
A
Exploded View INFOID:0000000005260459

EM

I
AWBIA0858GB

1. O-ring 2. Collared O-ring 3. Intake valve timing control cover (RH) J

4. Idler pulley 5. Drive belt auto tensioner 6. Intake valve timing control cover (LH)
7. Collared O-ring 8. O-ring 9. Chain tensioner cover
10. Cooling fan bracket 11. Crankshaft pulley 12. Front oil seal K
13. Water pump cover 14. Front timing chain case 15. O-ring
A. Refer to EM-51
L
Removal and Installation INFOID:0000000005260460

REMOVAL
M
1. Remove engine room cover. Refer to EM-25, "Removal and Installation".
2. Drain engine oil. Refer to LU-9, "Changing Engine Oil".
CAUTION: N
• Perform this step when engine is cold.
• Do not spill engine oil on drive belts.
3. Drain engine coolant from radiator. Refer to CO-12, "Changing Engine Coolant".
CAUTION: O
• Perform this step when engine is cold.
• Do not spill engine coolant on drive belts.
4. Remove radiator cooling fan assembly. Refer to CO-19, "Removal and Installation (Crankshaft driven P
type)".
5. Disconnect engine harnesses removing their brackets from front timing chain case.
6. Remove EVAP canister purge volume control solenoid valve, if necessary.
7. Remove drive belts. Refer to EM-14, "Removal and Installation".
8. Remove power steering oil pump from bracket with piping connected, and temporarily secure it aside.
Refer to ST-24, "Removal and Installation".

Revision: July 2009 EM-51 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
9. Remove power steering oil pump bracket. Refer to ST-24, "Removal and Installation".
10. Remove generator. Refer to CHG-21, "Removal and Installation".
11. Remove water bypass hoses and water hose clamp.
12. Remove cooling fan (crankshaft driven type) and fan bracket. Refer to CO-19, "Removal and Installation
(Crankshaft driven type)".
13. Remove water hose at oil cooler.
14. Remove oil cooler water bypass pipe from front timing chain case. Refer to LU-12, "Exploded View".
15. Remove right and left intake valve timing control covers.
• Loosen bolts in reverse order as shown.
• Cut liquid gasket for removal using Tool.

Tool number : KV10111100 (J-37228)

CAUTION:
Shaft is internally jointed with camshaft sprocket (INT) cen-
ter hole. When removing, keep it horizontal until it is com-
pletely disconnected.

SEM728G

16. Remove collared O-rings from front timing chain case (left and
right side).

PBIC2631E

17. Obtain No. 1 cylinder at TDC of its compression stroke as follows:

NOTE:
When timing chain is not removed/installed, this step is not required.
a. Rotate crankshaft pulley clockwise to align timing mark (A)
(grooved line without color) with timing indicator (B).

AWBIA0719ZZ

b. Make sure that intake and exhaust cam noses on No. 1 cylinder
(engine front side of right bank) are located as shown.
• If not, turn crankshaft one revolution (360°) and align as
shown.
NOTE:
When only timing chain (primary) is removed, rocker cover does
not need to be removed. To make sure that No. 1 cylinder is at
its compression TDC, remove front timing chain case first. Then
check mating marks on camshaft sprockets. Refer to EM-60,
"Removal and Installation".
SEM418G

Revision: July 2009 EM-52 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
18. Remove A/C compressor bolts and temporarily secure A/C compressor aside. Refer to HA-39, "Removal
and Installation for Compressor". A
19. Remove crankshaft pulley as follows:
a. Remove starter motor and set Tool. Refer to STR-24, "Removal
and Installation". EM

Tool number : — (J-48761)

C

WBIA0580E
E
b. Loosen crankshaft pulley bolt and locate bolt seating surface as
10 mm (0.39 in) from its original position.
CAUTION:
F
Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect the crankshaft pul-
ley from dropping.
G

H
PBIC2918E

c. Pull crankshaft pulley with both hands to remove it. I

20. Loosen two bolts in front of oil pan (upper) in reverse order as
shown.
J

L
PBIC2907E

21. Remove front timing chain case as follows:

M
a. Loosen bolts with power tool in reverse order as shown.

P
PBIC2908E

Revision: July 2009 EM-53 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
b. Insert suitable tool into the notch at the top of the front timing
chain case as shown (1).
c. Pry off case by moving tool as shown (2).
• Cut liquid gasket for removal using Tool.

Tool number : KV10111100 (J-37228)

CAUTION:
• Do not use screwdriver or something similar.
• After removal, handle front timing chain case carefully so
it does not twist, bend, or warp under a load.
SEM156F

22. Remove O-rings from rear timing chain case.

PBIC2548E

23. Remove water pump cover and chain tensioner cover from front timing chain case, if necessary.
• Cut liquid gasket for removal using Tool.

Tool number : KV10111100 (J-37228)

24. Remove front oil seal from front timing chain case using suitable
tool.
CAUTION:
Be careful not to damage front timing chain case.

PBIC2909E

25. Remove idler pulley, if necessary. Refer to EM-51, "Exploded View".

26. Use a scraper to remove all traces of old liquid gasket from front
and rear timing chain cases and oil pan (upper), and liquid gas-
ket mating surfaces.
CAUTION:
Be careful not to allow gasket fragments to enter oil pan.

PBIC2910E

Revision: July 2009 EM-54 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
• Remove old liquid gasket from bolt hole and thread.
A

EM

PBIC2084E

D
27. Use a scraper to remove all traces of old liquid gasket from
water pump cover, chain tensioner cover, if necessary and
intake valve timing control covers.
E

G
SEM926E

INSTALLATION
H
1. Hammer dowel pins (right and left) into front timing chain case
up to a point close to taper in order to shorten protrusion length.

K
PBIC2615E

2. Install new front oil seal on the front timing chain case.
• Apply new engine oil to both oil seal lip and dust seal lip. L
• Install it so that each seal lip is oriented as shown.

O
SEM715A

Revision: July 2009 EM-55 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
• Press-fit oil seal until it becomes flush with front timing chain
case end face using suitable drift [outer diameter: 60 mm (2.36
in)].
• Make sure the garter spring is in position and seal lip is not
inverted.
CAUTION:
• Be careful not to damage front timing chain case and
crankshaft.
• Press-fit straight and avoid causing burrs or tilting oil
seal.
PBIC2911E

3. Install water pump cover and chain tensioner cover to front timing chain case, if removed.
• Apply a continuous bead of liquid gasket using Tool to front
timing chain case as shown.

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

PBIC2912E

4. Install idler pulley, if removed.

5. Install front timing chain case as follows:
a. Apply a continuous bead of liquid gasket using Tool to front tim-
ing chain case back side as shown.

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

PBIC2913E

Revision: July 2009 EM-56 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
b. Install new O-rings on rear timing chain case.
c. Assemble front timing chain case as follows: A

EM

PBIC2548E

D
i. Fit lower end of front timing chain case tightly onto top face of oil
pan (upper). From the fitting point, make entire front timing chain
case contact rear timing chain case completely. E

G
PBIC1100E

ii. Since front timing chain case is offset for difference of bolt holes, H
tighten bolts temporarily while holding front timing chain case
from front and top as shown.
iii. Same as the previous step, insert dowel pin while holding front I
timing chain case from front and top completely.

PBIC2915E K

d. Tighten bolts to the specified torque in numerical order as

shown. L
e. After all bolts are tightened, retighten them to the specified
torque in numerical order as shown.
• There are four type of bolts.
M
Bolt position Bolt diameter
1-5 : 10 mm (0.39 in)
N
6 – 25 : 6 mm (0.24 in)
PBIC2908E

Bolt position Tightening specification O

1-5 : 55.0 N·m (5.6 kg-m, 41 ft-lb)
6 – 25 : 12.7 N·m (1.3 kg-m, 9 ft-lb)
P

Revision: July 2009 EM-57 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
6. Install two bolts in front of oil pan (upper) in numerical order as
shown.

Front oil pan bolt torque : 22.0 N·m (2.2 kg-m, 16 ft-lb)

PBIC2907E

7. Install right and left intake valve timing control covers as follows:
a. Install new seal rings in shaft grooves.
b. Apply a continuous bead of liquid gasket using Tool to intake
valve timing control covers as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

Tool number : WS39930000 ( — )

SBIA0492E

c. Install new collared O-rings in front timing chain case oil hole
(left and right sides).

PBIC2631E

d. Being careful not to move seal ring from the installation groove, align dowel pins on front timing chain
case with the holes to install intake valve timing control covers.
e. Tighten bolts in numerical order as shown.

PBIC0918E

8. Install crankshaft pulley as follows:

a. Install crankshaft pulley, taking care not to damage front oil seal.
• When press-fitting crankshaft pulley with plastic hammer, tap on its center portion (not circumference).
b. Tighten crankshaft pulley bolt in two steps.

Revision: July 2009 EM-58 2010 Pathfinder

 FRONT TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]

Step 1 : 44.1 N·m (4.5 kg-m, 33 ft-lb) A

Step 2 : 84° - 90° degrees clockwise
c. Remove Tool. EM
Tool number : — (J-48761)
C

WBIA0580E
E
9. Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns
smoothly.
10. Installation of the remaining components is in the reverse order of removal. F
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America". G
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide H
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant. I
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary. J
• Summary of the inspection items:

Item Before starting engine Engine running After engine stopped K

Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level L
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —
M
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Revision: July 2009 EM-59 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
TIMING CHAIN
Exploded View INFOID:0000000005260461

AWBIA0859GB

1. Internal chain guide 2. O-ring 3. Timing chain tensioner (secondary) (RH)

4. Camshaft sprocket (EXH) 5. Timing chain (secondary) 6. Timing chain (primary)
7. Camshaft sprocket RH (INT) 8. Camshaft sprocket LH (INT) 9. Slack guide
10. Timing chain tensioner (primary) 11. Crankshaft sprocket 12. Timing chain tensioner (secondary) (LH)
13. O-ring 14. Tension guide

Removal and Installation INFOID:0000000005260462

CAUTION:
• After removing timing chains, do not turn the crankshaft and camshaft separately, or the valves will
strike the pistons.
• When installing camshafts, chain tensioners, oil seals, or other sliding parts, lubricate contacting
surfaces with new engine oil.
• Apply new engine oil to bolt threads and seat surfaces when installing camshaft sprockets, camshaft
brackets, and crankshaft pulley.
REMOVAL
1. Remove front timing chain case. Refer to EM-51, "Removal and Installation".
2. Remove timing chain tensioner (primary) as follows:

Revision: July 2009 EM-60 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
a. Loosen clip of timing chain tensioner (primary), and release
plunger stopper (1). A
b. Insert plunger into tensioner body by pressing slack guide (2).
c. Keep slack guide pressed and hold plunger in by pushing stop-
per pin through the tensioner body hole and plunger groove (3). EM

PBIC2919E

D
d. Remove bolts and remove timing chain tensioner (primary).
3. Remove internal chain guide, tension guide and slack guide.
NOTE: E
Tension guide can be removed after removing timing chain (pri-
mary).
F

K
PBIC2266E

4. Remove timing chain (primary).

CAUTION: L
After removing timing chain (primary), do not turn crankshaft and camshaft separately, or valves
will strike the piston heads.
5. Remove crankshaft sprocket, if necessary. M
6. Remove timing chain (secondary) and camshaft sprockets as follows:
a. Attach suitable stopper pin to the right and left timing chain ten-
sioners (secondary). N
NOTE:
• Use approximately 0.5 mm (0.02 in) dia. hard metal pin as a
stopper pin.
O
• For removal of timing chain tensioner (secondary), refer to
EM-74. [Removing camshaft bracket (No. 1) is required.]

PBIC2047E

Revision: July 2009 EM-61 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
b. Remove camshaft sprocket (INT and EXH) bolts.
• Secure the hexagonal portion of camshaft using wrench to
loosen bolts.
CAUTION:
Do not loosen bolts by securing anything other than the
camshaft hexagonal portion.

KBIA1698J

c. Remove timing chain (secondary) together with camshaft sprockets.

• Turn camshaft slightly to secure slackness of timing chain on timing chain tensioner (secondary) side.
• Insert 0.5 mm (0.020 in)-thick metal or resin plate between tim-
ing chain and timing chain tensioner plunger (guide). Remove
timing chain (secondary) together with camshaft sprockets
with timing chain loose from guide groove.
CAUTION:
Be careful of plunger coming off when removing timing
chain (secondary).
NOTE:
Camshaft sprocket (INT) is a one piece integrated design
sprockets for timing chain (primary) and for timing chain (sec-
ondary).
PBIC1978E

• When handling camshaft sprocket (INT), be careful of the fol-

lowing:
CAUTION:
• Handle carefully to avoid any shock to camshaft
sprocket.
• Do not disassemble. (Do not loosen bolts (A) as shown).

PBIC2920E

7. Remove timing chain tensioners (secondary) from cylinder head if necessary.

a. Remove camshaft brackets (No. 1). Refer to EM-74, "Removal and Installation".
b. Remove timing chain tensioners (secondary) with stopper pin attached.
INSPECTION AFTER REMOVAL
Check for cracks and any excessive wear at link plates. Replace
chain if necessary.
• In the same way as for the LH bank, inspect the timing chain and
associated parts on the RH bank.

PBIC0282E

Revision: July 2009 EM-62 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
INSTALLATION
A

EM

H
WBIA0716E

1. Internal chain guide 2. Camshaft sprocket (intake) 3. Mating mark (blue link)
4. Mating mark (punched) 5. Secondary timing chain tensioner 6. Mating mark (copper link) I
7. Secondary timing chain 8. Camshaft sprocket (exhaust) 9. Tensioner guide
10. Water pump 11. Crankshaft sprocket 12. Mating mark (notched)
13. Primary timing chain 14. Slack guide 15. Primary timing chain tensioner J
16. Mating mark (back side) 17. Crankshaft key

NOTE: K
The figure above shows the relationship between the mating mark on each timing chain and that on the corre-
sponding sprocket, with the components installed.
1. Install timing chain tensioners (secondary) to cylinder head if removed.
L
a. Install timing chain tensioners (secondary) with stopper pin attached and new O-ring.
b. Install camshaft brackets (No. 1). Refer to EM-74, "Removal and Installation".
2. Make sure that dowel pin hole, dowel pin of camshaft and crank- M
shaft key are located as shown. (No. 1 cylinder at compression
TDC)
• NOTE:
Though camshaft does not stop at the position as shown, for N
the placement of cam nose, it is generally accepted camshaft
is placed for the same direction of the figure.
O
Camshaft dowel pin hole (intake side)
: At cylinder head upper face side in each bank.
Camshaft dowel pin (exhaust side) KBIA1073E P
: At cylinder head upper face side in each bank.
Crankshaft key
: At cylinder head side of right bank.
CAUTION:
Hole on small dia. side must be used for intake side dowel pin hole. Do not misidentify (ignore big
dia. side).
Revision: July 2009 EM-63 2010 Pathfinder
 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
3. Install timing chains (secondary) and camshaft sprockets as follows:
CAUTION:
Mating marks between timing chain and sprockets slip easily. Confirm all mating mark positions
repeatedly during the installation process.
a. Push plunger of timing chain tensioner (secondary) and keep it
pressed in with stopper pin.

SEM430G

b. Install timing chains (secondary) (8) and camshaft sprockets

(INT (1) and EXH (9)).
• Left bank mating marks (6)
• Align the timing chain mating marks (secondary) (2) (blue
color link) with the ones on camshaft sprockets (INT and EXH)
(4), (5), (7) and (10) (punched), and install them.
NOTE:
• Mating marks for camshaft sprocket (INT) are on the back
side of camshaft sprocket (secondary).
• There are two types of mating marks, circle (7), (10) and
oval (4), (5) types. They should be used for the right and left
banks, respectively.

Right bank : Use circle type (7) and (10).

Left bank : Use oval type (4) and (5).
• Align dowel pin (3) and pin hole on camshafts with the groove
(11) and dowel pin on sprockets, and install them.
• On the intake side, align pin hole on the small diameter side of
the camshaft front end with dowel pin (3) on the back side of
camshaft sprocket, and install them.
• On the exhaust side, align dowel pin on camshaft front end
with pin groove (11) on camshaft sprocket, and install them.
WBIA0689E
• In case that positions of each mating mark and each dowel pin
do not fit on mating parts, make fine adjustment to the position holding the hexagonal portion on cam-
shaft with wrench or equivalent.
• Bolts for camshaft sprockets must be tightened in the next step. Tightening them by hand is enough to
prevent the dislocation of dowel pins.
• It may be difficult to visually check the dislocation of mating
marks during and after installation. To make the matching eas-
ier, make a mating mark on the top of sprocket teeth and its
extended line in advance with paint.

SEM811G

Revision: July 2009 EM-64 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
c. After confirming the mating marks are aligned, tighten camshaft
sprocket bolts. A
• Secure camshaft using wrench at the hexagonal portion to
tighten bolts.
EM

KBIA1698J

D
d. Pull stopper pins out from timing chain tensioners (secondary).

G
PBIC2110E

4. Install tension guide.

H
5. Install timing chain (primary) as follows:
a. Install crankshaft sprocket.
• Make sure the mating marks on crankshaft sprocket face the I
front of engine.

SEM929E

Revision: July 2009 EM-65 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
b. Install the primary timing chain.
• Water pump (G).
• Install primary timing chain so the mating mark punched (B) on
camshaft sprocket is aligned with the blue link (A) on the tim-
ing chain, while the mating mark notched (E) on the crankshaft
sprocket (D) is aligned with the copper link (F) on the timing
chain, as shown.
• When it is difficult to align mating marks (A) with (B) and (E)
with (F) of the primary timing chain with each sprocket, gradu-
ally turn the camshaft using a wrench on the hexagonal por-
tion to align it with the mating marks.
• During alignment, be careful to prevent dislocation of mating
mark alignments of the secondary timing chains.

WBIA0721E

6. Install internal chain guide, slack guide and timing chain ten-
sioner (primary).

PBIC2109E

CAUTION:

Revision: July 2009 EM-66 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VQ40DE]
Do not overtighten slack guide bolts. It is normal for a gap
to exist under the bolt seats when bolts are tightened to A
specification.

EM

PBIC2633E

D
• When installing timing chain tensioner (primary), push in plunger and keep it pressed in with stopper pin.
• Remove any dirt and foreign materials completely from the back and the mounting surfaces of timing
chain tensioner (primary). E
• After installation, pull out stopper pin.

7. Make sure again that the mating marks on camshaft sprockets and timing chain have not slipped out of
alignment. F
8. Install front timing chain case. Refer to EM-51, "Removal and Installation".
INSPECTION AFTER INSTALLATION G
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Run engine to check for unusual noise and vibration.
H
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises. I
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system. J
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
K
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
L
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage M
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
N

Revision: July 2009 EM-67 2010 Pathfinder

 REAR TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
REAR TIMING CHAIN CASE
Exploded View INFOID:0000000005568764

AWBIA0860GB

1. Rear timing chain case 2. Water drain plug (front) 3. O-rings

4. Cylinder block A. Refer to installation

Removal and Installation INFOID:0000000005568765

CAUTION:
• After removing timing chain, do not turn the crankshaft and camshaft separately, or the valves will
strike the pistons.
• Before removing the upper oil pan, remove the crankshaft position sensor (POS).
• Be careful not to damage sensor edges.
REMOVAL
1. Remove oil pan (lower) and (upper). Refer to EM-36, "Removal and Installation".
2. Remove front timing chain case. Refer to EM-51, "Removal and Installation".
3. Remove timing chains and related components. Refer to EM-60, "Removal and Installation".
4. Remove water pump, if necessary. Refer to CO-22, "Exploded View".
5. Remove rear timing chain case as follows:

Revision: July 2009 EM-68 2010 Pathfinder

 REAR TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
a. Loosen and remove bolts using power tool in reverse order as
shown. A
b. Cut liquid gasket using Tool and remove rear timing chain case.

Tool number : KV10111100 (J-37228) EM

PBIC2921E

D
CAUTION:
• Do not remove plate metal cover of oil passage.
• After removal, handle rear timing chain case carefully so E
it does not twist, bend, or warp under a load.

PBIC2922E

H
6. Remove O-rings from cylinder head and camshaft bracket (No.
1).
I

K
SBIA0496E

7. Remove O-rings from cylinder block.

L

PBIC0788E
O

Revision: July 2009 EM-69 2010 Pathfinder

 REAR TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
8. Use scraper to remove all traces of old liquid gasket from rear
timing chain case, and opposite mating surfaces.

PBIC2910E

• Remove old liquid gasket from bolt hole and thread.

PBIC2084E

INSTALLATION
1. Install rear timing chain case as follows:
a. Install new O-rings onto cylinder block.

PBIC0788E

b. Install new O-rings to cylinder head and camshaft bracket

(No. 1).

SBIA0496E

c. Apply liquid gasket using Tool to rear timing chain case back side as shown.

Tool number : WS39930000 ( — )

Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-14, "Recommended Chemical Prod-
ucts and Sealants".
CAUTION:
• For “A”, completely wipe off liquid gasket covering the area shown.

Revision: July 2009 EM-70 2010 Pathfinder

 REAR TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
• Apply liquid gasket on installation position of water pump and cylinder head very completely.
A

EM

I
PBIC2924E

d. Align rear timing chain case with dowel pins (right and left) on cylinder block and install rear timing chain
case. J
• Make sure O-rings stay in place during installation to cylinder block, cylinder head and camshaft bracket
(No. 1).
e. Tighten bolts in numerical order as shown.
• There are two type of bolts with different torque specifications. K
Refer to the following for installing bolts.

Bolt length Bolt position Torque specification L

20 mm 1, 2, 3, 6, 7, 8, : 12.7 N·m (1.3 kg-m, 9 ft-lb)

(0.79 in) 9, 10
M
16 mm 4, 5, 11 : 12.7 N·m (1.3 kg-m, 9 ft-lb)
(0.63 in)
16 mm 12 through 26 : 15.0 N·m (1.5 kg-m, 11 ft-lb) PBIC2921E
N
(0.63 in)
f. After all bolts are tightened, retighten them to the specified torque in numerical order as shown.
• If liquid gasket protrudes, wipe it off immediately. O

Revision: July 2009 EM-71 2010 Pathfinder

 REAR TIMING CHAIN CASE
< ON-VEHICLE REPAIR > [VQ40DE]
g. After installing rear timing chain case, check the surface height
difference between following parts on oil pan (upper) mounting
surface.

Standard
Rear timing chain case to lower cylinder block:
–0.24 to 0.14 mm (–0.0094 to 0.0055 in)
• If not within the standard, repeat the installation procedure.

PBIC2925E

2. Install water pump with new O-rings, if removed. Refer to CO-22, "Removal and Installation".
3. Install timing chains and related components. Refer to EM-60, "Removal and Installation".
4. Install front timing chain case. Refer to EM-51, "Removal and Installation".
5. Install oil pan (upper) and (lower). Refer to EM-36, "Removal and Installation".
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluid leaks, lubricant leaks and exhaust gases leaks.
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to MA-16, "For North America", MA-17, "For Mexico: Fluids and
Lubricants".
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal/installation, slack in the guide may
generate a pounding noise during and just after engine start. However, this is normal. Noise will stop after
hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids includ-
ing engine oil and engine coolant.
• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
* Transmission fluid, power steering fluid, brake fluid, etc.

Revision: July 2009 EM-72 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
CAMSHAFT
A
Exploded View INFOID:0000000005260463

EM

PBIC2930E

N
Intake valve timing control solenoid
1. 2. Gasket 3. Camshaft bracket (No. 2 to 4)
valve (RH bank)
4. Camshaft (EXH) 5. Camshaft (INT) 6. Camshaft bracket (No. 1)
O
7. Dowel pin 8. Valve lifter 9. O-ring
Timing chain tensioner (secondary)
10. 11. Spring 12. Plunger
(RH bank)
Timing chain tensioner (secondary)
P
13. 14. Cylinder head (RH bank) 15. Cylinder head (LH bank)
(LH bank)
Camshaft position sensor (PHASE) Camshaft position sensor (PHASE)
16. O-ring 17. 18.
(RH bank) (LH bank)
19. Intake valve timing control solenoid
valve (LH bank)

Revision: July 2009 EM-73 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
Removal and Installation INFOID:0000000005260464

REMOVAL
1. Release the fuel pressure (LH only). Refer to EC-495, "Fuel Pressure Check".
2. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
3. Remove front wheels and tires. Refer to WT-49, "Rotation".
4. Remove front fender protectors. Refer to EXT-23, "Removal and Installation of Front Fender Protector".
5. Remove front timing chain case, camshaft sprockets, timing chains and rear timing chain case. Refer to
EM-68, "Removal and Installation".
6. Remove camshaft position sensor (PHASE) (right and left
banks) from cylinder head back side.
CAUTION:
• Handle carefully to avoid dropping and shocks.
• Do not disassemble.
• Do not allow metal powder to adhere to magnetic part at
sensor tip.
• Do not place sensors in a location where they are
exposed to magnetism.

KBIA1046E

7. Remove intake valve timing control solenoid valves.

• Discard intake valve timing control solenoid valve gaskets and
use new gaskets for installation.

WBIA0169E

8. Remove camshaft brackets.

• Mark camshafts, camshaft brackets and bolts so they are placed in the same position and direction for
installation.

Revision: July 2009 EM-74 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
• Equally loosen camshaft bracket bolts in several steps in
reverse order as shown. A

EM

G
PBIC2050E

9. Remove camshafts.
H
10. Remove valve lifters, if necessary.
• Identify installation positions, and store them without mixing them up.
11. Remove timing chain tensioner (secondary) from cylinder head.
• Remove timing chain tensioner (secondary) with its stopper I
pin attached.
NOTE:
Stopper pin was attached when timing chain (secondary) was J
removed.

PBIC2111E
L
INSPECTION AFTER REMOVAL
Camshaft Runout M
1. Put V-block on precise flat table, and support No. 2 and 4 journal
of camshaft.
CAUTION: N
Do not support journal No. 1 (on the side of camshaft
sprocket) because it has a different diameter from the other
three locations.
O
2. Set dial indicator vertically to No. 3 journal.
3. Turn camshaft to one direction with hands, and measure the
camshaft runout on dial indicator. (Total indicator reading)
P
PBIC0929E
Standard : Less than 0.02 mm (0.0008 in)
Limit : 0.05 mm (0.0020 in)
4. If it exceeds the limit, replace camshaft.
Camshaft Cam Height

Revision: July 2009 EM-75 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
1. Measure the camshaft cam height with micrometer.

Standard:
Intake : 45.465 - 45.655 mm (1.7900 - 1.7974 in)
Exhaust : 45.075 - 45.265 mm (1.7746 - 1.7821 in)
Limit:
Intake : 45.265 mm (1.7821 in)
Exhaust : 44.875 mm (1.7667 in)
2. If wear exceeds the limit, replace camshaft. EMQ0072D

Camshaft Journal Oil Clearance

CAMSHAFT JOURNAL DIAMETER

• Measure the outer diameter of camshaft journal with micrometer.

Standard:
No. 1 : 25.935 - 25.955 mm (1.0211 - 1.0218 in)
No. 2, 3, 4 : 23.445 - 23.465 mm (0.9230 - 0.9238 in)

PBIC0040E

CAMSHAFT BRACKET INNER DIAMETER

• Tighten camshaft bracket bolt with the specified torque.
• Measure the inner diameter “A” of camshaft bracket with bore
gauge.

Standard:
No. 1 : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
No. 2, 3, 4 : 23.500 - 23.521 mm (0.9252 - 0.9260 in)

PBIC1645E

CAMSHAFT JOURNAL OIL CLEARANCE

• (Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter).

Standard:
No. 1 : 0.045 - 0.086 mm (0.0018 - 0.0034 in)
No. 2, 3, 4 : 0.035 - 0.076 mm (0.0014 - 0.0030 in)
Limit : 0.15 mm (0.0059 in)
• If the calculated value exceeds the limit, replace either or both camshaft and cylinder head.
NOTE:
Camshaft bracket cannot be replaced as a single part, because it is machined together with cylinder head.
Replace whole cylinder head assembly.
Camshaft End Play

Revision: July 2009 EM-76 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
• Install dial indicator in thrust direction on front end of camshaft.
Measure the end play of dial indicator when camshaft is moved for- A
ward/backward (in direction to axis).

Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in) EM

Limit : 0.24 mm (0.0094 in)

SEM864E

D
• Measure the following parts if out of the limit.
- Dimension “A” for camshaft No. 1 journal
E
Standard : 27.500 - 27.548 mm (1.0827 - 1.0846 in)
- Dimension “B” for cylinder head No. 1 journal bearing
F
Standard : 27.360 - 27.385 mm (1.0772 - 1.0781 in)
• Following the standards above, replace camshaft and/or cylinder
head. G
KBIA2404J

Camshaft Sprocket Runout

H
1. Put V-block on precise flat table, and support No. 2 and 4 journal of camshaft.
CAUTION:
Do not support journal No. 1 (on the side of camshaft sprocket) because it has a different diameter
from the other three locations. I
2. Measure the camshaft sprocket runout with dial indicator. (Total
indicator reading)
J
Limit : 0.15 mm (0.0059 in)
• If it exceeds the limit, replace camshaft sprocket.
K

L
PBIC0930E

Valve Lifter
M
Check if surface of valve lifter has any wear or cracks.
• If anything above is found, replace valve lifter. Refer to EM-128,
"Standard and Limit".
N

P
KBIA0182E

Valve Lifter Clearance

VALVE LIFTER OUTER DIAMETER

Revision: July 2009 EM-77 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
• Measure the outer diameter at 1/2 height of valve lifter with
micrometer since valve lifter is in barrel shape.

Standard (Intake and exhaust)

: 33.977 - 33.987 mm (1.3377 - 1.3381 in)

JEM798G

VALVE LIFTER HOLE DIAMETER

• Measure the inner diameter of valve lifter hole of cylinder head with
inside micrometer.

Standard (Intake and exhaust)

: 34.000 - 34.016 mm (1.3386 - 1.3392 in)

SEM867E

VALVE LIFTER CLEARANCE

• (Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter outer diameter), Refer to EM-19, "Valve
Clearance".

Standard (Intake and exhaust)

: 0.013 - 0.039 mm (0.0005 - 0.0015 in)
• If the calculated value is out of the standard, referring to each standard of valve lifter outer diameter and
valve lifter hole diameter, replace either or both valve lifter and cylinder head.
INSTALLATION
1. Install timing chain tensioners (secondary) on both sides of cyl-
inder head.
• Install timing chain tensioner with its stopper pin attached.
• Install timing chain tensioner with sliding part facing downward
on right-side cylinder head, and with sliding part facing upward
on left-side cylinder head.
• Install new O-rings as shown.

PBIC2111E

2. Install valve lifters.

• Install it in the original position.
3. Install camshafts.

Revision: July 2009 EM-78 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
• Install camshaft with dowel pin attached to its front end face on
the exhaust side. A

EM

KBIA1071E

D
• Follow your identification marks made during removal, or fol-
low the identification marks that are present on new camshafts
for proper placement and direction. E

Paint marks Identification

Bank INT/EXH Dowel pin
M1 M2 mark F
INT No Green No RE
RH
EXH Yes No White RE
G
INT No Green No LH
LH KBIA1009E
EXH Yes No White LH
H
• Install camshaft so that dowel pin hole and dowel pin on front
end face are positioned as shown. (No. 1 cylinder TDC on its
compression stroke) I
NOTE:
• Large and small pin holes are located on front end face of
camshaft (INT), at intervals of 180°. Face small dia. side pin
hole upward (in cylinder head upper face direction). J
• Though camshaft does not stop at the portion as shown, for
the placement of cam nose, it is generally accepted cam-
shaft is placed for the same direction as shown. K
PBIC2478E

Revision: July 2009 EM-79 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
4. Install camshaft brackets.
• Remove foreign material completely from camshaft bracket
backside and from cylinder head installation face.
• Install camshaft bracket in original position and direction as
shown.

PBIC2051E

• Install camshaft brackets (No. 2 to 4) aligning the stamp marks

as shown.
NOTE:
There are no identification marks indicating left and right for
camshaft bracket (No. 1).

PBIC2052E

• Apply liquid gasket to mating surface of camshaft bracket (No.

1) as shown on right and left banks.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

PBIC2660E

Revision: July 2009 EM-80 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
5. Tighten camshaft bracket bolts in the following steps, in numeri-
cal order as shown. A

Camshaft bracket bolts

Step 1 (bolts 7 - 10) : 1.96 N·m (0.2 kg-m, 17 in-lb) EM
Step 2 (bolts 1 - 6) : 1.96 N·m (0.2 kg-m, 17 in-lb)
Step 3 : 5.88 N·m (0.6 kg-m, 52 in-lb)
C
Step 4 : 10.4 N·m (1.1 kg-m, 92 in-lb)

G
PBIC2050E

6. Measure the difference in levels between front end faces of

camshaft bracket (No. 1) and cylinder head. H

Standard : –0.14 to 0.14 mm (–0.0055 to 0.0055 in)

• Measure two positions (both intake and exhaust side) for a I
single bank.
• If the measured value is out of the standard, re-install cam-
shaft bracket (No. 1). J

EMQ0044D
K
7. Check and adjust the valve clearance. Refer to EM-19, "Valve Clearance".
8. Installation of the remaining components is in the reverse order of removal.
L
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT) Oil Groove
WARNING: M
• Check when engine is cold so as to prevent burns from any splashing engine oil.
CAUTION:
• Perform this inspection only when DTC P0011 or P0021 are detected in self-diagnostic results of N
CONSULT-III and it is directed according to inspection procedure of EC section. Refer to EC-103,
"DTC Confirmation Procedure".
1. Check the engine oil level. Refer to LU-8, "Inspection".
O
2. Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a. Release fuel pressure. Refer to EC-495, "Fuel Pressure Check".
P
b. Disconnect ignition coil and injector harness connectors.
3. Remove intake valve timing control solenoid valve. Refer to EM-51, "Removal and Installation".

Revision: July 2009 EM-81 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VQ40DE]
4. Crank the engine, and then make sure that engine oil comes out
from camshaft bracket (No. 1) oil hole. End cranking after check-
ing.
WARNING:
• Be careful not to touch rotating parts (drive belts, idler
pulley, and crankshaft pulley, etc.).
CAUTION:
• Engine oil may squirt from intake valve timing control
solenoid valve installation hole during cranking. Use a
shop cloth to prevent the engine components and the
vehicle. PBIC2869E
• Do not allow engine oil to get on rubber components such
as drive belt or engine mount insulators. Immediately wipe off any splashed engine oil.
• Clean oil groove between oil strainer and intake valve timing control solenoid valve if engine oil does not
come out from camshaft bracket (No. 1) oil hole. Refer to LU-7, "Lubrication Circuit", LU-7, "System Chart".
5. Remove components between intake valve timing control solenoid valve and camshaft sprocket (INT),
and then check each oil groove for clogging.
• Clean oil groove if necessary. Refer to LU-7, "Lubrication Circuit", LU-7, "System Chart".
6. After inspection, installation of the remaining components is in the reverse order of removal.
Inspection for Leaks
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:

Item Before starting engine Engine running After engine stopped

Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Revision: July 2009 EM-82 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VQ40DE]
OIL SEAL
A
Removal and Installation of Valve Oil Seal INFOID:0000000005260465

REMOVAL EM
1. Turn crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent valve from dropping
into cylinder.
2. Remove camshaft relating to valve oil seal to be removed. Refer to EM-74, "Removal and Installation". C
3. Remove valve lifters. Refer to EM-74, "Removal and Installation".
4. Remove valve collet, valve spring retainer and valve spring
using Tool. D
CAUTION:
When working, take care not to damage valve lifter holes.
E
Tool numbers : KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — ) F
• Compress valve spring using Tool attachment, adapter.
Remove valve collet with magnet hand. WBIA0578E
G

5. Remove valve oil seal using Tool.

H
Tool number : KV10107902 (J-38959)

WBIA0489E

K
INSTALLATION
1. Apply new engine oil to new valve oil seal joint surface and seal lip.
2. Press in valve oil seal to specified height "H" using Tool. L

Tool number : — (J-39386)

NOTE: M
Dimension "H": height measured before valve spring seat instal-
lation.
N
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
3. Installation of the remaining components is in the reverse order
of removal. WBIA0490E O
Removal and Installation of Front Oil Seal INFOID:0000000005260466

P
REMOVAL
1. Remove engine under cover. Refer to EXT-14, "Removal and Installation".
2. Remove drive belt. Refer to EM-14, "Removal and Installation".
3. Remove engine cooling fan assembly. Refer to CO-19, "Removal and Installation (Crankshaft driven
type)".
4. Remove crankshaft pulley. Refer to EM-60, "Removal and Installation".

Revision: July 2009 EM-83 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VQ40DE]
5. Remove front oil seal using suitable tool.
CAUTION:
Be careful not to damage front timing chain case and crank-
shaft.

PBIC2931E

INSTALLATION
1. Apply new engine oil to both oil seal lip and dust seal lip of new front oil seal.
2. Install front oil seal.
• Install front oil seal so that each seal lip is oriented as shown.

SEM715A

• Press-fit until the height of front oil seal is level with the mount-
ing surface using suitable tool.
- Suitable drift: outer diameter 60 mm (2.36 in), inner diameter
50 mm (1.97 in).
CAUTION:
• Be careful not to damage front timing chain case and
crankshaft.
• Press-fit straight and avoid causing burrs or tilting oil
seal.

PBIC2931E

3. Installation is in the reverse order of removal after this step.

Removal and Installation of Rear Oil Seal INFOID:0000000005260467

REMOVAL
1. Remove transmission assembly. Refer to TM-191, "2WD : Removal and Installation" (2WD models), TM-
195, "4WD : Removal and Installation" (4WD models).
2. Remove driveplate. Refer to EM-101, "Exploded View".
3. Remove rear oil seal with a suitable tool.
CAUTION:
Be careful not to damage crankshaft and cylinder block.

PBIC2932E

Revision: July 2009 EM-84 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VQ40DE]
INSTALLATION
1. Apply new engine oil to new rear oil seal joint surface and seal lip. A
2. Install rear oil seal so that each seal lip is oriented as shown.

EM

D
SEM715A

E
• Install new rear oil seal using Tool.

Tool number : — (J-49815)

F
: — (J-8092)
CAUTION:
• Be careful not to damage crankshaft and cylinder block. G
• Press-fit oil seal straight to avoid causing burrs or tilt-
ing.
• Do not touch grease applied onto oil seal lip.
H
PBIC2933E

• Press in rear oil seal to the position as shown. I

SBIA0281E L
3. Installation of the remaining components is in the reverse order of removal.
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed cor- M
rectly during reassembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of
drivetrain components. N

Revision: July 2009 EM-85 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
CYLINDER HEAD
Exploded View INFOID:0000000005260468

PBIC2934E

1. Rubber plug 2. Cylinder head (left bank) 3. Cylinder head bolt

4. Cylinder head (right bank) 5. Harness bracket 6. Cylinder head gasket (right bank)
7. Cylinder head gasket (left bank)

Removal and Installation INFOID:0000000005260469

REMOVAL
1. Remove camshaft. Refer to EM-74, "Removal and Installation".
2. Remove intake manifold. Refer to EM-30, "Removal and Installation".
3. Remove exhaust manifold. Refer to EM-33, "Removal and Installation (Exhaust Manifold)".
4. Remove water inlet and thermostat assembly. Refer to CO-27, "Removal and Installation".
5. Remove water outlet, water pipe and heater pipe. Refer to CO-29, "Removal and Installation".

Revision: July 2009 EM-86 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
6. Remove cylinder head bolts in reverse order as shown using
suitable tool and power tool to remove cylinder heads (right and A
left banks).

EM

G
PBIC2057E

7. Remove cylinder head gaskets.

H
INSPECTION AFTER REMOVAL
Cylinder Head Bolts Outer Diameter
• Cylinder head bolts are tightened by plastic zone tightening I
method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace the bolt with a new one.
J
Limit (“d1” – “d2”) : 0.11 mm (0.0043 in)
• If reduction of outer diameter appears in a position other than “d2”,
use it as “d2” point. K

PBIC2480E L
Cylinder Head Distortion
NOTE:
When performing this inspection, cylinder block distortion should be also checked. Refer to EM-112, "Inspec- M
tion After Disassembly".
1. Using suitable tool, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.
CAUTION: N
Do not allow gasket fragments to enter engine oil or engine coolant passages.
2. At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions. O

Limit : 0.1 mm (0.004 in)

• If it exceeds the limit, replace cylinder head. P

SEM861E

INSTALLATION

Revision: July 2009 EM-87 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
1. Install new cylinder head gasket.
2. Turn crankshaft until No. 1 piston is set at TDC.
• Crankshaft key should line up with the right bank cylinder cen-
ter line as shown.

SEM532G

3. Install cylinder head follow the steps below to tighten cylinder

head bolts in numerical order as shown.
CAUTION:
If cylinder head bolts re-used, check their outer diameters
before installation. Refer to EM-86, "Removal and Installa-
tion" (Cylinder Head Bolts Outer Diameter).

Step a : 98 N·m (10 kg-m, 72 ft-lb)

Step b : Loosen to 0 N·m in the reverse order of tight-
ening.
Step c : 39.2 N·m (4.0 kg-m, 29 ft-lb)

PBIC2057E

Measure the tightening angle using Tool.

Tool number : KV10112100 (BT-8653-A)

Step d : 90° clockwise

Step e : 90° clockwise

WBIA0581E

Revision: July 2009 EM-88 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
4. After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (left and right A
banks).

Standard : 14.1 - 14.9 mm (0.555 - 0.587 in) EM

• If the measured value is out of the standard, re-install cylinder
head.
C

EMQ0662D

D
5. Installation of the remaining parts is in the reverse order of removal.

INSPECTION AFTER INSTALLATION E

• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage. F
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration. G
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop H
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system. I
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items: J

Item Before starting engine Engine running After engine stopped

Engine coolant Level Leakage Level K
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
L

Exhaust gas — Leakage —

* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
M

Revision: July 2009 EM-89 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
Exploded View INFOID:0000000005260470

PBIC2637E

1. Valve lifter 2. Valve collet 3. Valve spring retainer

4. Valve spring 5. Valve oil seal 6. Valve spring seat
7. Valve guide 8. Spark plug 9. Spark plug tube
10. Cylinder head (right bank) 11. Valve seat 12. Valve (EXH)
13. Valve (INT) 14. Cylinder head (left bank)

Disassembly and Assembly INFOID:0000000005260471

DISASSEMBLY
1. Remove spark plug.
2. Remove valve lifter.
• Identify installation positions, and store them without mixing them up.
3. Remove valve collet.
• Compress valve spring and remove valve collet with magnet
hand using Tool.
CAUTION:
When working, take care not to damage valve lifter holes.

Tool numbers : KV10109220 ( — )

: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
WBIA0578E

4. Remove valve spring retainer, valve spring and valve spring seat.
5. Push valve stem to combustion chamber side, and remove valve.
• Identify installation positions, and store them without mixing them up.

Revision: July 2009 EM-90 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
6. Remove valve oil seals using Tool.
A
Tool number : KV10107902 (J-38959)

EM

WBIA0489E

D
7. If valve seat must be replaced, refer to EM-92, "Inspection After Disassembly".
8. If valve guide must be replaced, refer to EM-92, "Inspection After Disassembly".
9. Remove spark plug tube, as necessary. E
• Using pair of pliers, pull spark plug tube out of cylinder head.
CAUTION:
• Take care not to damage cylinder head.
• Once removed, spark plug tube will be deformed and cannot be reused. Do not remove it unless F
absolutely necessary.
ASSEMBLY
G
1. When valve guide is removed, install it. Refer to EM-92, "Inspection After Disassembly".
2. When valve seat is removed, install it. Refer to EM-92, "Inspection After Disassembly".
3. Install valve oil seals using Tool. H

Tool number : — (J-39386)

I
Height "H" (Without valve spring seat installed)
Intake and exhaust : 14.3 - 14.9 mm (0.563 - 0.587 in)
J
4. Install valve spring seat.
5. Install valves.
• Install it in the original position.
WBIA0490E K
NOTE:
Larger diameter valves are for intake side.

L
6. Install valve spring (uneven pitch type).
• Install narrow pitch end (paint mark) to cylinder head side
(valve spring seat side).
M

O
SEM085D

7. Install valve spring retainer.

P

Revision: July 2009 EM-91 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
8. Install valve collet.
• Compress valve spring using Tool, attachment and adapter
using Tool. Install valve collet with magnet hand.

Tool numbers : KV10109220 ( — )

: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
CAUTION:
When working, take care not to damage valve lifter holes
or valve stems. WBIA0578E
• Tap valve stem edge lightly with plastic hammer after installa-
tion to check its installed condition.

9. Install valve lifter.

• Install it in the original position.
10. Install spark plug tube.
• Press-fit spark plug tube as follows:
a. Remove old liquid gasket adhering to cylinder head mounting hole.
b. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.
Use Genuine High Strength Locking Sealant or equivalent. Refer to GI-14, "Recommended Chemi-
cal Products and Sealants".
c. Press-fit spark plug tube so that its height “H” is as specified
using suitable drift.

Standard press-fit height “H”

: 38.1 - 39.1 mm (1.500 - 1.539 in)
CAUTION:
• When press-fitting, take care not to deform spark plug
tube.
• After press-fitting, wipe off liquid gasket protruding onto
cylinder-head upper face.
PBIC2638E
11. Install spark plug.
Inspection After Disassembly INFOID:0000000005260472

VALVE DIMENSIONS
• Check dimensions of each valve. For dimensions, refer to EM-128, "Standard and Limit".
• If dimensions are out of the standard, replace valve and check the valve seat contact.
VALVE GUIDE CLEARANCE
Valve Stem Diameter
Measure the diameter of valve stem with micrometer.

Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)

SEM938C

Valve Guide Inner Diameter

Measure the inner diameter of valve guide with inside micrometer.

Revision: July 2009 EM-92 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]

Standard A
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve Guide Clearance
EM
(Valve guide clearance) = (Valve guide inner diameter) – (Valve stem diameter).

Valve guide clearance:

C
Standard
Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in) D
Limit
Intake : 0.08 mm (0.003 in)
E
Exhaust : 0.09 mm (0.004 in)
• If the calculated value exceeds the limit, replace valve and/or valve guide.
VALVE GUIDE REPLACEMENT F
When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.
1. To remove valve guide, heat cylinder head to 110° to 130°C
(230° to 266°F) by soaking in heated oil. G

SEM008A
J
2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US
ton, 2.0 Imp ton) pressure] or hammer and suitable tool.
WARNING: K
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
L

M
SEM931C

3. Ream cylinder head valve guide hole using suitable tool. N

Valve guide hole diameter (for service parts):

Intake and exhaust O
: 10.175 - 10.196 mm (0.4006 - 0.4014 in)

SEM932C

Revision: July 2009 EM-93 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
4. Heat cylinder head to 110° to 130°C (230° to 266°F) by soaking
in heated oil.

SEM008A

5. Press valve guide from camshaft side to the dimensions as

shown using suitable tool.

Projection “L”
Intake and exhaust
: 12.6 - 12.8 mm (0.496 - 0.504 in)
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.
SEM950E

6. Apply reamer finish to valve guide using suitable tool.

Standard:
Intake and exhaust
: 6.000 - 6.018 mm (0.2362 - 0.2369 in)

SEM932C

VALVE SEAT CONTACT

• After confirming that the dimensions of valve guides and valves are
within the specifications, perform this procedure.
• Apply prussian blue (or white lead) onto contacting surface of valve
seat to check the condition of the valve contact on the surface.
• Check if the contact area band is continuous all around the circum-
ference.
• If not, grind to adjust valve fitting and check again. If the contacting
surface still has “NG” conditions even after the re-check, replace
valve seat.

SBIA0322E

VALVE SEAT REPLACEMENT

When valve seat is removed, replace with oversized [0.5 mm (0.020 in)] valve seat.
1. Bore out old seat until it collapses. Boring should not continue beyond the bottom face of the seat recess
in cylinder head. Set the machine depth stop to ensure this. Refer to EM-128, "Standard and Limit".
CAUTION:
Do not scratch cylinder head by excessive boring.

Revision: July 2009 EM-94 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
2. Ream cylinder head recess diameter for service valve seat.
A
Oversize [0.5 mm (0.020 in)]
Intake : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in) EM

• Be sure to ream in circles concentric to valve guide center.

This will enable valve to fit correctly.
C

SEM795A

D
3. Heat cylinder head to 110° to 130°C (230° to 266°F) by soaking
in heated oil.
E

G
SEM008A

4. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.
H
WARNING:
• Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
CAUTION:
• Avoid directly touching cold valve seats. I
5. Finish seat to the specified dimensions using suitable tool. Refer
to EM-128, "Standard and Limit".
CAUTION: J
When using valve seat cutter, firmly grip cutter handle with
both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper K
pressure on cutter or cutting many different times may
result in staged valve seat.
L

SEM934C

6. Using compound, grind to adjust valve fitting. M

7. Check again for normal contact.
VALVE SPRING SQUARENESS N
• Set try square along the side of valve spring and rotate spring.
Measure the maximum clearance between the top face of spring
and try square.
O
Limit : 2.1 mm (0.083 in)
• If it exceeds the limit, replace valve spring.
P

PBIC0080E

VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD

Revision: July 2009 EM-95 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VQ40DE]
• Check valve spring pressure at the specified spring height.

Standard:
Intake and exhaust
Free height
: 47.07 mm (1.8531 in)
Installation height
: 37.00 mm (1.4567 in)
Installation load SEM113

: 166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)

Height during valve open
: 27.20 mm (1.0709 in)
Load with valve open
: 373 - 421 N (38.0 - 42.9 kg, 84 - 95 lb)
• If the installation load or load with valve open is out of the standard, replace valve spring.

Revision: July 2009 EM-96 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VQ40DE]

REMOVAL AND INSTALLATION A

ENGINE ASSEMBLY
Exploded View INFOID:0000000005260473
EM

N
AWBIA0721GB

1. Rear engine mounting insulator 4WD 2. Rear engine mounting insulator 2WD 3. LH engine mounting bracket (upper)
O
4. LH heat shield plate 5. LH engine mounting insulator 6. LH engine mounting bracket (lower)
7. RH engine mounting bracket (lower) 8. RH engine mounting insulator 9. RH heat shield plate
10. RH engine mounting bracket (upper)
P
Removal and Installation INFOID:0000000005260474

WARNING:
• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS
CATALOG.
Revision: July 2009 EM-97 2010 Pathfinder
 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VQ40DE]
CAUTION:
• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exhaust system and engine coolant are cooled sufficiently.
• If items or work required are not covered by the engine section, follow the procedures in the applica-
ble sections.
• Always use the support point specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons,
support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.
• For supporting points for lifting and jacking point at rear axle, refer to GI-29, "Garage Jack and
Safety Stand".
REMOVAL
Preparation
1. Remove front and rear engine under covers, if equipped. Refer to EXT-14, "Removal and Installation".
2. Drain engine oil. Refer to LU-9, "Changing Engine Oil".
3. Remove engine oil filter.
4. Drain engine coolant. Refer to CO-12, "Changing Engine Coolant".
5. Partially drain A/T fluid. Refer to TM-157, "Changing the A/T Fluid (ATF)".
6. Remove the front wheels and tires. Refer to WT-49, "Rotation".
7. Remove the front fender protectors. Refer to EXT-23, "Removal and Installation of Front Fender Protec-
tor".
8. Release fuel pressure. Refer to EC-495, "Fuel Pressure Check".
9. Remove the engine hood. Refer to DLK-191, "Removal and Installation of Hood Assembly".
10. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
11. Remove engine room cover. Refer to EM-25, "Removal and Installation".
12. Remove the air duct and resonator assembly and air cleaner case assembly. Refer to EM-26, "Removal
and Installation".
13. Disconnect vacuum hose between vehicle and engine and set it aside.
14. Remove the radiator assembly and hoses. Refer to CO-16, "Removal and Installation".
15. Remove the drive belts. Refer to EM-14, "Removal and Installation".
16. Remove the engine cooling fan. Refer to CO-19, "Removal and Installation (Crankshaft driven type)".
17. Disconnect the engine room harness from the engine side and set it aside.
18. Disconnect the engine harness grounds.
19. Disconnect the reservoir tank for power steering from engine and move it aside.
20. Disconnect power steering oil pump from engine. Move it from its location and secure with a rope. Refer to
ST-24, "Removal and Installation".
21. Remove the A/C compressor bolts and set aside. Refer to HA-39, "Removal and Installation for Compres-
sor".
22. Disconnect brake booster vacuum line.
23. Disconnect EVAP line.
24. Disconnect the fuel hose at the engine side connection. Refer to EM-46, "Removal and Installation".
25. Disconnect the heater hoses at cowl, and install plugs to avoid leakage of engine coolant.
26. Remove the A/T oil level indicator and indicator tube.
27. Remove front final drive assembly (4WD models). Refer to DLN-353, "Removal and Installation".
28. Remove three way catalyst. Refer to EM-32, "Removal and Installation (Three Way Catalyst)".

Revision: July 2009 EM-98 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VQ40DE]
29. Install engine slingers into left bank and right bank.
A
Engine slinger torque: 28.0 N·m (2.9 kg-m, 21 ft-lb)
30. Remove front frame crossmember.
EM
31. Remove transmission. Refer to TM-191, "2WD : Removal and
Installation" (2WD models) or TM-195, "4WD : Removal and
Installation" (4WD models).
32. Lift with hoist and secure the engine in position. C
33. Remove engine assembly from vehicle, avoiding interference
with vehicle body. WBIA0624E

CAUTION: D
• Before and during this lifting, always check if any harnesses are left connected.
34. Remove the parts that may restrict installation of engine to engine stand.
NOTE: E
The procedure is described assuming that you use a engine holding the surface, to which transmission is
installed.
• Remove drive plate. Refer to EM-121, "Dowel Pin Alignment". F
CAUTION:
Use an engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to G
reduce the potential risk of overturning the stand.
- Remove fuel tube and fuel injector assembly. Refer to EM-46, "Removal and Installation".
- Remove intake manifold. Refer to EM-30, "Removal and Installation". H
- Remove rocker cover. Refer to EM-42, "Removal and Installation".
- Other removable brackets.
CAUTION:
Before removing the hanging chains, make sure the engine stand is stable and there is no risk of I
overturning.
35. Remove generator. Refer to CHG-21, "Removal and Installation".
36. Remove engine mounting insulator bracket (upper) with power tool. J

INSTALLATION
Installation is in the reverse order of removal. K
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly
during reassembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of driv- L
etrain components.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are M
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel N
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE: O
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises. P
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:

Revision: July 2009 EM-99 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VQ40DE]

Item Before starting engine Engine running After engine stopped

Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Revision: July 2009 EM-100 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]

DISASSEMBLY AND ASSEMBLY A

ENGINE UNIT
Exploded View INFOID:0000000005260475
EM

N
WBIA0582E

1. Reinforcement plate 2. Drive plate 3. Rear oil seal

O
4. Sub harness 5. Knock sensor 6. Water connector
7. Cylinder block 8. Oil jet 9. Thrust bearing
10. Pilot converter 11. Main bearing 12. Crankshaft
P
13. Crankshaft key 14. Lower cylinder block 15. Lower cylinder block bolt
16. Connecting rod bolt 17. Connecting rod bearing cap 18. Connecting rod bearing
19. Connecting rod 20. Snap ring 21. Piston pin
22. Piston 23. Oil ring 24. Second ring
25. Top ring

Revision: July 2009 EM-101 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]

PBIC2936E

1. Cylinder block 2. Gasket 3. Cylinder block heater

4. Connector protector cap

Disassembly and Assembly INFOID:0000000005260476

DISASSEMBLY
NOTE:
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, some steps may be different.
1. Remove engine assembly from vehicle. Refer to EM-97, "Removal and Installation".
2. Remove both exhaust manifolds. Refer to EM-33, "Removal and Installation (Exhaust Manifold)".

Revision: July 2009 EM-102 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
3. Lift engine, and mount to engine stand.
CAUTION: A
Before removing the hanging chains, make sure engine
stand is stable and there is no risk of overturning.
EM

G
PBIC0805E

• A widely use engine stand can be used. H

CAUTION:
Use engine stand that has a load capacity [approximately
220 kg (441 lb) or more] large enough for supporting the
engine weight. I

PBIC0085E
K
4. Drain engine coolant by removing the cylinder block drain plugs
(A), (B), (C) and (D) from cylinder block as shown.
NOTE: L
For Canada, (D) is not plug but block heater.

WLIA0020E

Revision: July 2009 EM-103 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
5. Remove cylinder head. Refer to EM-86, "Removal and Installation".
6. Remove sub harness, and remove knock sensors.
CAUTION:
Carefully handle sensor avoiding shocks.
7. Remove pilot converter using Tool as necessary.

Tool number : ST16610001 (J-23907)

WBIA0583E

8. Remove piston and connecting rod assembly as follows:

• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
EM-112, "Inspection After Disassembly".
CAUTION:
Be careful not to drop connecting rod bearing, and to scratch the surface.
9. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
10. Remove connecting rod bearing cap.
11. Push piston and connecting rod assembly out to the cylinder
head side using suitable tool.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.

PBIC2940E

12. Remove connecting rod bearings from connecting rod and connecting rod bearing cap.
CAUTION:
Identify installation position, and store them without mixing them up.
13. Remove piston rings from piston.
• Before removing piston rings, check the piston ring side clearance. Refer to EM-112, "Inspection After
Disassembly".
• Remove piston rings using piston ring expander or suitable
tool.
CAUTION:
• When removing piston rings, be careful not to damage
piston.
• Be careful not to damage piston rings by expanding them
excessively.

PBIC0087E

14. Remove piston from connecting rod as follows:

Revision: July 2009 EM-104 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
a. Remove snap ring using snap ring pliers.
A

EM

PBIC1638E

D
b. Heat piston to 60° to 70°C (140° to 158°F) with industrial use
drier or equivalent.
E

G
PBIC1639E

c. Push out piston pin with stick of outer diameter approximately 20

H
mm (0.79 in).

PBIC0262E
K
15. Remove lower cylinder block bolts.
• Before loosening lower cylinder block bolts, measure the crankshaft end play. Refer to EM-112, "Inspec-
tion After Disassembly". L
• Loosen lower cylinder block bolts in reverse order as shown in
several different steps.
NOTE: M
Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).

O
PBIC2941E

16. Remove lower cylinder block. P

• Cut liquid gasket for removal. Refer to EM-6, "Precaution for Liquid Gasket".

Tool number : KV10111100 (J-37228)

CAUTION:
Be careful not to damage the mounting surfaces.
17. Remove crankshaft.
18. Pull rear oil seal out from rear end of crankshaft.
Revision: July 2009 EM-105 2010 Pathfinder
 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
NOTE:
When replacing rear oil seal without removing lower cylinder block, use a suitable tool to pull the rear oil
seal installed between crankshaft and cylinder block out.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
19. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
• Do not drop main bearing, or scratch the surface.
• Identify installation positions, and store them without mixing them up.
20. Remove oil jet.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
WARNING:
Use goggles to protect your eyes.
2. Install each plug to cylinder block as shown.
• Apply sealant to the thread of water drain plugs (A) and (B).
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
• Apply sealant to the thread of plug (C).
Use Genuine High Strength Thread Locking Sealant or
equivalent. Refer to GI-14, "Recommended Chemical
Products and Sealants".
• Apply sealant to the threads of plug (D).
Use Anaerobic Liquid Gasket or equivalent. Refer to GI-
14, "Recommended Chemical Products and Sealants".
NOTE:
For Canada, (D) is not plug but block heater. Refer to EM-102,
"Disassembly and Assembly".
• Replace washers with new one.

WLIA0020E

• Tighten each plug as specified below.

Block Plug and Block Heater Installation
Part Washer Tightening Torque
A No 19.6 N·m (2.0 kg-m, 14 ft-lb)
Reuse 9.8 N·m (1.0 kg-m, 87 in-lb)
B No
New 6.0 N·m (0.61 kg-m, 53 in-lb)
C Yes 116 N·m (11.8 kg-m, 85 ft-lb)
Plug 62 N·m (6.3 kg-m, 46 ft-lb)
D Yes
Block heater 73.5 N·m (7.5 kg-m, 54 ft-lb)
3. Install oil jet.

Revision: July 2009 EM-106 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten bolts. A

EM

PBIC0898E

D
4. Install main bearings and thrust bearings as follows:
a. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.
b. Install thrust bearings to the both sides of the No. 3 journal hous- E
ing on cylinder block.
• Install thrust bearings with the oil groove facing crankshaft arm
(outside).
F
• Install thrust bearing with a projection on one end on cylinder
block, Align projection with mating notch.

PBIC2968E H

c. Install main bearings paying attention to the direction.

• Main bearing with oil hole and groove goes on cylinder block. I
The one without them goes on lower cylinder block.
• Before installing main bearings, apply engine oil to the bearing
surface (inside). Do not apply engine oil to the back surface,
but thoroughly clean it. J
• When installing, align main bearing stopper protrusion to cut-
out of cylinder block and lower cylinder block.
• Ensure the oil holes on cylinder block and those on the corre- K
sponding bearing are aligned.
PBIC2969E

L
5. Install crankshaft to cylinder block.
• While turning crankshaft by hand, check that it turns smoothly.
6. Inspect the outer diameter of lower cylinder block bolt. Refer to EM-112, "Inspection After Disassembly".
M
7. Install lower cylinder block as follows:
NOTE:
Lower cylinder block cannot be replaced as a single part, because it is machined together with cylinder
block. N
a. Apply a continuous bead of liquid gasket using Tool to lower cyl-
inder block as shown.
O
Tool number : WS39930000 ( — )
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants". P
CAUTION:
After liquid gasket is applied, rear oil seal installation must
be finished within 5 minutes. Therefore, the following pro-
cedure must be performed quickly.
PBIC2942E
b. Tighten lower cylinder block as follows:
i. Apply new engine oil to threads and seat surfaces of the bolts.

Revision: July 2009 EM-107 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
ii. Tighten M8 bolts in numerical order as shown from No. 17 to 24.

Bolts 17 - 24 : 22.1 N·m (2.3 kg-m, 16 ft-lb)

CAUTION:
Wipe off completely any protruding liquid gasket on rear oil
seal installation surface.
NOTE:
There are more processes to complete the tightening bolts.
However stop procedure here to install rear oil seal.

PBIC2941E

c. Install rear oil seal. Refer to EM-84, "Removal and Installation of Rear Oil Seal".
d. Restart tightening of lower cylinder block bolts as follows:
i. Tighten M10 bolts in numerical order as shown from No. 1 to 16.
NOTE:
Use TORX socket (size E14) for bolts No. 1 to 16 (M10 bolt).

Bolts 1 - 16 : 35.3 N·m (3.6 kg-m, 26 ft-lb)

PBIC2941E

ii. Turn M10 bolts 90° clockwise in numerical order from No. 1 to
16 using Tool.

Tool number : KV10112100 (BT-8653-A)

CAUTION:
Use angle wrench Tool to check tightening angle. Do not
make judgement by visual inspection.

WBIA0584E

• After installing the bolts, make sure that crankshaft can be rotated smoothly by hand.
• Wipe off completely any protruding liquid gasket on front side of the engine.
• Check the crankshaft end play. Refer to EM-112, "Inspection After Disassembly".
8. Inspect the outer diameter of connecting rod bolt. Refer to EM-112, "Inspection After Disassembly".
9. Install piston to connecting rod as follows:
a. Install new snap ring to the groove of piston rear side using suitable tool.
• Insert it fully into groove to install.
b. Install piston to connecting rod.
• Using industrial use drier or similar tool, heat piston until piston pin can be pushed in by hand without
excess force [approx. 60° to 70 °C (140° to 158 °F)]. From the front to the rear, insert piston pin into pis-
ton and connecting rod.

Revision: July 2009 EM-108 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• Assemble so that the front mark on the piston head and the
cylinder number on connecting rod are positioned as shown. A
c. Install new snap ring to the groove of the piston front side.
• Insert it fully into groove to install.
• After installing, make sure that connecting rod moves EM
smoothly.

SEM838F

D
10. Install piston rings using piston ring expander or suitable tool.
CAUTION:
• When installing piston rings, be careful not to damage
E
piston.
• Be careful not to damage piston rings by expending them
excessively.
F

G
PBIC0087E

• If there is stamped mark on ring, mount it with marked side up. H

NOTE:
If there is no stamp on ring, no specific orientation is required
for installation.
I
Stamped mark:
Top ring :—
J
Second ring : R

SEM757G K

• Position each ring with the gap as shown referring to the pis-
ton front mark. L

PBIC0808E

O
• Check the piston ring side clearance. Refer to EM-112, "Inspection After Disassembly".
11. Install connecting rod bearings to connecting rod and connecting rod bearing cap.
• Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not apply P
engine oil to the back surface, but thoroughly clean it.

Revision: July 2009 EM-109 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• When installing, align connecting rod bearing stopper protru-
sion with cutout of connecting rods and connecting rod bearing
caps to install.
• Ensure the oil hole on connecting rod and that on the corre-
sponding bearing are aligned.

PBIC2067E

12. Install piston and connecting rod assembly to crankshaft.

13. Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
14. Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
15. Match the cylinder position with the cylinder number on connecting rod to install.
NOTE:
Be sure that front mark on piston head is facing front of engine.
16. Install piston with the front mark on the piston head facing the
front of engine using Tool.

Tool number : EM03470000 (J-8037)

CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod big
end.

WBIA0585E

17. Install connecting rod bearing cap.

• Match the stamped cylinder number marks on connecting rod
with those on connecting rod bearing cap to install.
• Be sure that front mark on connecting rod bearing cap is fac-
ing front of engine.

PBIC0809E

18. Tighten connecting rod bolts as follows:

a. Apply engine oil to the threads and seats of connecting rod bolts.
b. Tighten connecting rod bolts.

Connecting rod bolt : 19.6 N·m (2.0 kg-m, 14 ft-lb)

Revision: July 2009 EM-110 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
c. Then tighten all connecting rod bolts 90° clockwise.
CAUTION: A
Always use Tool. Avoid tightening based on visual check
alone.
EM
Tool number : KV10112100 (BT-8653-A)
• After tightening connecting rod bolts, make sure that crank-
shaft rotates smoothly. C
• Check the connecting rod side clearance. Refer to EM-112,
"Inspection After Disassembly".
WBIA0586E

D
19. Install pilot converter.
• With drift of the following outer diameter, press-fit as far as it
will go.
E
Pilot converter : Approx. 33 mm (1.30 in)

G
PBIC2947E

• Press-fit pilot converter with its chamfer facing crankshaft as H

shown.

SEM537E K
20. Install knock sensors.
• Install knock sensor so that connector faces rear of engine.
• After installing knock sensor, connect harness connector, and L
lay it out to rear of engine.
CAUTION:
• Do not tighten bolts while holding connector. M
• If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
• Make sure that there is no foreign material on the cylinder N
block mating surface and the back surface of knock sensor.
• Make sure that knock sensor does not interfere with other
parts. O

PBIC2948E

Revision: July 2009 EM-111 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
21. Assembly is in the reverse order of disassembly after this step.
Inspection After Disassembly INFOID:0000000005260477

CRANKSHAFT END PLAY

• Measure the clearance between thrust bearings and crankshaft
arm when crankshaft is moved fully forward or backward with dial
indicator.

Standard : 0.10 - 0.25 mm (0.0039 - 0.0098 in)

Limit : 0.30 mm (0.0118 in)
• If the measured value exceeds the limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crankshaft
also.
PBIC2953E

CONNECTING ROD SIDE CLEARANCE

• Measure the side clearance between connecting rod and crank-
shaft arm with feeler gauge.

Standard : 0.20 - 0.35 mm (0.0079 - 0.0138 in)

Limit : 0.40 mm (0.0157 in)
• If the measured value exceeds the limit, replace connecting rod,
and measure again. If it still exceeds the limit, replace crankshaft
also.

PBIC2954E

PISTON TO PISTON PIN CLEARANCE

Piston Pin Hole Diameter
Measure the inner diameter of piston pin hole with inside microme-
ter.

Standard : 21.993 - 22.005 mm (0.8659 - 0.8663 in)

PBIC0116E

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with micrometer.

Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)

PBIC0117E

Piston to Piston Pin Oil Clearance

(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)

Revision: July 2009 EM-112 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]

Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in) A

• If the calculated value is out of the standard, replace piston and piston pin assembly.
• When replacing piston and piston pin assembly, refer to EM-123, "How to Select Piston and Bearing".
NOTE: EM
• Piston is available together with piston pin as assembly.
• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no
piston pin grades can be selected. (Only “0” grade is available.)
C
PISTON RING SIDE CLEARANCE
• Measure side clearance of piston ring and piston ring groove with
feeler gauge. D

Standard:
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in) E
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.065 - 0.135 mm (0.0026 - 0.0053 in)
Limit: F
Top ring : 0.11 mm (0.0043 in)
SEM024AA
2nd ring : 0.10 mm (0.0039 in)
G
• If the measured value exceeds the limit, replace piston ring, and measure again.
If it still exceeds the limit, replace piston.
PISTON RING END GAP H
• Make sure that the cylinder bore inner diameter is within the speci-
fication. Follow the "Cylinder Bore Inner Diameter" procedure.
• Lubricate with new engine oil to piston and piston ring, and then I
insert piston ring until middle of cylinder with piston, and measure
the piston ring end gap with feeler gauge.
J
Standard:
Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.33 - 0.48 mm (0.0130 - 0.0189 in) K
Oil ring : 0.20 - 0.50 mm (0.0079 - 0.0197 in) PBIC0118E

Limit:
L
Top ring : 0.56 mm (0.0220 in)
2nd ring : 0.68 mm (0.0268 in)
Oil ring : 0.85 mm (0.0335 in) M
• If the measured value exceeds the limit, replace piston ring, and measure again.
CONNECTING ROD BEND AND TORSION
N

Revision: July 2009 EM-113 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• Check with connecting rod aligner.

Bend:
Limit: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
Torsion:
Limit: 0.30 mm (0.0118 in) per 100 mm (3.94 in) length
• If it exceeds the limit, replace connecting rod assembly.

PBIC2077E

CONNECTING ROD DIAMETER (BIG END)

• Install connecting rod bearing cap without installing connecting rod
bearing, and tightening connecting rod bolts to the specified
torque. Refer to EM-102, "Disassembly and Assembly" for the
tightening procedure.
• Measure the inner diameter of connecting rod big end with inside
micrometer.

Standard : 57.000 - 57.013 mm (2.2441 - 2.2446 in)

• If out of the standard, replace connecting rod assembly.

PBIC1641E

CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)

Connecting Rod Bushing Inside Diameter (Small End)
Measure inside diameter of connecting rod bushing using suitable
tool.

Standard : 22.000 - 22.012 mm (0.8661 - 0.8666 in)

PBIC0120E

Piston Pin Diameter

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
Measure diameter of piston pin using suitable tool.
A
Standard : 21.989 - 22.001 mm (0.8657 - 0.8662 in)

EM

PBIC0117E

D
Connecting Rod Bushing Oil Clearance (Small End)
(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)
E
Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)
Limit : 0.030 mm (0.0012 in)
F
• If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.
• If replacing piston and piston pin assembly, refer to EM-123, "How to Select Piston and Bearing".
• If replacing connecting rod assembly, follow the "CONNECTING G
ROD BEARING OIL CLEARANCE" procedure to select the con-
necting rod bearing.
H

PBIC0809E
J

Factory installed parts grading:

• Only grade “0”. K
Unit: mm (in)
Grade 0 1
Connecting rod bushing 22.000 - 22.006 22.006 - 22.012
L
inner diameter * (0.8661 - 0.8664) (0.8664 - 0.8666)
21.993 - 21.999 21.999 - 22. 005
Piston pin hole diameter
(0.8659 - 0.8661) (0.8661 - 0.8663) M
21.989 - 21.995 21.995 - 22.001
Piston pin outer diameter
(0.8657- 0.8659) (0.8659 - 0.8662)
N
*: After installing in connecting rod PBIC2950E

CYLINDER BLOCK DISTORTION

• Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder block surface. O
CAUTION:
Do not allow any debris to enter engine oil or engine coolant passages.
P

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• Measure the distortion on the cylinder block upper face at some
different points in six directions with straightedge and feeler gauge.

Limit : 0.1 mm (0.004 in)

• If it exceeds the limit, replace cylinder block.

SEM123C

MAIN BEARING HOUSING INNER DIAMETER

• Install lower cylinder block without installing main bearings, and
tighten lower cylinder block bolts to the specified torque. Refer to
EM-102, "Disassembly and Assembly" for the tightening proce-
dure.
• Measure the inner diameter of main bearing housing with bore
gauge.

Standard : 74.993 - 75.017 mm (2.9525 - 2.9534 in)

• If out of the standard, replace cylinder block and lower cylinder
block as assembly.
NOTE: PBIC2012E

Cylinder block cannot be replaced as a single part, because it is

machined together with lower cylinder block.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter
• Using bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. (“X” and “Y” direc-
tions at “A”, “B” and “C”) (“X” is in longitudinal direction of engine)

Standard inner diameter:

95.500 - 95.530 mm (3.7598 - 3.7610 in)
Out-of-round (Difference between “X” and “Y”):
0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”):
0.01 mm (0.0004 in) PBIC2955E

• If the measured value exceeds the limit, or if there are scratches

and/or seizure on the cylinder inner wall, hone or re-bore the inner
wall.

SEM843E

Piston Skirt Diameter

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Measure the outer diameter of piston skirt with micrometer.
A
Measure point
: Distance from the top 43.03 mm (1.6941 in)
Standard EM
: 95.480 - 95.510 mm (3.7590 - 3.7602 in)

PBIC2956E

D
Piston to Cylinder Bore Clearance
Calculate by piston skirt diameter and cylinder bore inner diameter (direction “X”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter).
E
Standard : 0.010 - 0.030 mm (0.0004 - 0.0012 in)
Limit : 0.08 mm (0.0031 in)
F
• If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to EM-123, "How to
Select Piston and Bearing".
Re-boring Cylinder Bore G
1. Cylinder bore size is determined by adding piston to cylinder bore clearance to piston skirt diameter.

Re-bored size calculation: D = A + B – C H

where,
D: Bored diameter
I
A: Piston skirt diameter as measured
B: Piston to cylinder bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in) J
2. Install lower cylinder block, and tighten to the specified torque. Otherwise, cylinder bores may be distorted
in final assembly.
3. Cut cylinder bores. K
NOTE:
• When any cylinder needs boring, all other cylinders must also be bored.
• Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a L
time.
4. Hone cylinders to obtain the specified piston to cylinder bore clearance.
5. Measure the finished cylinder bore for out-of-round and taper. M
NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT MAIN JOURNAL DIAMETER N
• Measure the outer diameter of crankshaft main journals with micrometer.

Standard : 69.951 - 69.975 mm (2.7540 - 2.7549 in) dia. O

• If out of the standard, measure the main bearing oil clearance. Then use undersize bearing.
CRANKSHAFT PIN JOURNAL DIAMETER
P

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• Measure the outer diameter of crankshaft pin journal with
micrometer.

Standard : 53.956 - 53.974 mm (2.1242 - 2.1250 in) dia.

• If out of the standard, measure the connecting rod bearing oil
clearance. Then use undersize bearing.

PBIC0127E

OUT-OF-ROUND AND TAPER OF CRANKSHAFT

• Measure the dimensions at four different points as shown on each
main journal and pin journal with micrometer.
• Out-of-round is indicated by the difference in the dimensions
between (X) and (Y) at (A) and (B).
• Taper is indicated by the difference in the dimensions between (A)
and (B) at (X) and (Y).

Limit:
Out-of-round [Difference between (X) and (Y)]
: 0.002 mm (0.0001 in)
SBIA0535E
Taper [Difference between (A) and (B)]
: 0.002 mm (0.0001 in)
• If the measured value exceeds the limit, correct or replace crankshaft.
• If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then select
the main bearing and/or connecting rod bearing.
CRANKSHAFT RUNOUT
• Place V-block on precise flat table, and support the journals on the
both end of crankshaft.
• Place dial indicator straight up on the No. 3 journal.
• While rotating crankshaft, read the movement of the pointer on dial
indicator. (Total indicator reading)

Standard : Less than 0.05 mm (0.002 in)

Limit : 0.10 mm (0.0039 in)
• If it exceeds the limit, replace crankshaft.
SEM346D

CONNECTING ROD BEARING OIL CLEARANCE

Method by Calculation
• Install connecting rod bearings to connecting rod and cap, and
tighten connecting rod bolts to the specified torque. Refer to EM-
102, "Disassembly and Assembly" for the tightening procedure.
• Measure the inner diameter of connecting rod bearing with inside
micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diameter) –
(Crankshaft pin journal diameter)

Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in) (actu-

al clearance)
Limit : 0.070 mm (0.0028 in) PBIC1642E

• If the calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod
big end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer to
EM-123, "How to Select Piston and Bearing".
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Method of Using Plastigage
• Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely. A
• Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
• Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the specified
EM
torque. Refer to EM-102, "Disassembly and Assembly" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
• Remove connecting rod bearing cap and bearing, and using scale C
on plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is D
same as that described in the “Method by Calculation”.

PBIC1149E F
MAIN BEARING OIL CLEARANCE
Method by Calculation G
• Install main bearings to cylinder block and lower cylinder block,
and tighten lower cylinder block bolts to the specified torque. Refer
to EM-102, "Disassembly and Assembly" for the tightening proce-
H
dure.
• Measure the inner diameter of main bearing with bore gauge.
(Bearing clearance) = (Main bearing inner diameter) – (Crankshaft
main journal diameter) I

Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)

(actual clearance) J
Limit : 0.065 mm (0.0026 in) PBIC2204E

• If the calculated value exceeds the limit, select proper main bearing according to main bearing inner diame-
ter and crankshaft main journal diameter to obtain specified bearing oil clearance. Refer to EM-123, "How to K
Select Piston and Bearing".
Method of Using Plastigage
• Remove engine oil and dust on crankshaft main journal and the surfaces of each bearing completely. L
• Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.
• Install main bearings to cylinder block and lower cylinder block, and tighten lower cylinder block bolts to the M
specified torque. Refer to EM-102, "Disassembly and Assembly" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.
• Remove lower cylinder block and bearings, and using scale on N
plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is O
same as that described in the “Method by Calculation”.

PBIC1149E

CRUSH HEIGHT OF MAIN BEARING

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• When lower cylinder block is removed after being tightened to the
specified torque with main bearings installed, the tip end of bearing
must protrude. Refer to EM-102, "Disassembly and Assembly" for
the tightening procedure.

Standard : There must be crush height.

• If the standard is not met, replace main bearings.

SEM502G

CRUSH HEIGHT OF CONNECTING ROD BEARING

• When connecting rod bearing cap is removed after being tightened
to the specified torque with connecting rod bearings installed, the
tip end of bearing must protrude. Refer to EM-102, "Disassembly
and Assembly" for the tightening procedure.

Standard : There must be crush height.

• If the standard is not met, replace connecting rod bearings.

PBIC1646E

LOWER CYLINDER BLOCK BOLT OUTER DIAMETER

• Measure the outer diameters [(d1), (d2)] at two positions as shown.
• If reduction appears in (A) range, regard it as (d2).

Limit [(d1) - (d2)] : 0.11 mm (0.0051 in)

• If it exceeds the limit (large difference in dimensions), replace
lower cylinder block bolt with new one.

PBIC0911E

CONNECTING ROD BOLT OUTER DIAMETER

• Measure the outer diameter (d) at position shown.
• If the reduction appears in a position other than (d), regard it as (d).

Limit : 7.75 mm (0.3051 in)

• When (d) exceeds the limit (when it becomes thinner), replace
connecting rod bolt with new one.

PBIC0912E

DRIVE PLATE

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 ENGINE UNIT
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• Check drive plate and signal plate for deformation or cracks.
CAUTION: A
• Do not disassemble drive plate.
• Do not place drive plate with signal plate facing down.
• When handling signal plate, take care not to damage or
EM
scratch it.
• Handle signal plate in a manner that prevents it from becom-
ing magnetized.
• If anything is found, replace drive plate. C

PBIC2938E

D
OIL JET
• Check nozzle for deformation and damage.
• Blow compressed air from nozzle, and check for clogs.
• If it is not satisfied, clean or replace oil jet. E

OIL JET RELIEF VALVE

• Using clean plastic stick, press check valve in oil jet relief valve.
Make sure that valve moves smoothly with proper reaction force. F
• If it is not satisfied, replace oil jet relief valve.

EMU0468D
I
Dowel Pin Alignment INFOID:0000000005260478

REMOVAL J
1. Use suitable tool to lock the drive plate and match mark (A) the
drive plate before removing the drive plate bolts.
CAUTION: K
Do not damage the ring gear teeth, or the signal plate teeth
behind the ring gear.
L

M
ALBIA0522ZZ

2. Remove drive plate. N

• Loosen the drive plate bolts in a diagonal order.
CAUTION:
• Never place drive plate with signal plate facing down.
O
• When handling the signal plate, take care not to damage
or scratch it.
• Handle the signal plate in a manner that prevents it from
becoming magnetized P

SEM760G

INSTALLATION
1. Installation is in the reverse order of removal.

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< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
• When installing the drive plate to the crankshaft, use the
match mark (A) as shown to correctly align the crankshaft side
dowel pin to the drive plate side dowel pin hole.

ALBIA0522ZZ

• Install the drive plate and the reinforcement plate in the direc-
tion as shown.

PBIC0910E

• Tighten the drive plate bolts in a diagonal pattern in two steps. Refer to EM-102, "Disassembly and
Assembly".

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
HOW TO SELECT PISTON AND BEARING
A
How to Select Piston and Bearing INFOID:0000000005260479

DESCRIPTION EM

Selection points Selection parts Selection items Selection methods

Determined by match of cylin- C
der block bearing housing
Between cylinder block and Main bearing grade grade (inner diameter of hous-
Main bearing
crankshaft (bearing thickness) ing) and crankshaft journal
grade (outer diameter of jour- D
nal)
Combining service grades for
connecting rod big end diame- E
Between crankshaft and con- Connecting rod bearing grade
Connecting rod bearing ter and crankshaft pin outer di-
necting rod (bearing thickness)
ameter determine connecting
rod bearing selection.
F
Piston and piston pin assembly
Between cylinder block and pis- Piston grade Piston grade = cylinder bore
(Piston is available together
ton (piston skirt diameter) grade (inner diameter of bore)
with piston pin as assembly.)
Between piston and connecting G
— — —
rod*
*: For the service parts, the grade for fitting cannot be selected between piston pin and connecting rod. (Only (0) grade is available.) The
information at the shipment from the plant is described as a reference. H
• The identification grade stamped on each part is the grade for the dimension measured in new condition.
This grade cannot apply to reused parts.
• For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the I
measurement with the values of each selection table.
• For details of the measurement method of each part, the reuse standards and the selection method of the
selective fitting parts, follow the applicable procedures.
J
HOW TO SELECT PISTON
When New Cylinder Block is Used
Check the cylinder bore grade [(1), (2), or (3)] on rear side of cylinder K
block, and select piston of the same grade.
NOTE:
Piston is available with piston pin as a set for the service part. (Only L
(0) grade piston pin is available.)

PBIC2949E
N
When Cylinder Block is Reused
1. Measure the cylinder bore inner diameter. Refer to EM-112, "Inspection After Disassembly". O
2. Determine the bore grade by comparing the measurement with
the values under the cylinder bore inner diameter of the “Piston
Selection Table”.
P

PBIC2950E

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
3. Select piston of the same grade.
Piston Selection Table
Unit: mm (in)

Grade 1 2 (or no mark) 3

95.500 - 95.510 95.510 - 95.520 95.520 - 95.530
Cylinder bore inner diameter
(3.7598 - 3.7602) (3.7602 - 3.7606) (3.7606 - 3.7610)
95.480 - 95.490 95.490 - 95.500 95.500 - 95.510
Piston skirt diameter
(3.7590 - 3.7594) (3.7594 - 3.7598) (3.7598 - 3.7602)
NOTE:
• Piston is available together with piston pin as assembly.
• Piston pin (piston pin hole) grade is provided only for the parts installed at the plant. For service parts, no pis-
ton pin grades can be selected. (Only “0” grade is available.)
• No second grade mark is available on piston.
HOW TO SELECT CONNECTING ROD BEARING
When New Connecting Rod and Crankshaft are Used
Check pin journal grade (“0”, “1”, or “2”) on front of crankshaft, and
select connecting rod bearing of the same grade.
NOTE:
There is no grading for connecting rod big end diameter.

PBIC2951E

When Crankshaft and Connecting Rod are Reused

1. Measure the connecting rod big end diameter. Refer to EM-112, "Inspection After Disassembly".
2. Make sure that the connecting rod big end diameter is within the standard value.
3. Measure the crankshaft pin journal diameter. Refer to EM-112, "Inspection After Disassembly".
4. Determine the grade of crankshaft pin journal grade by corresponding to the measured dimension in
“Crankshaft pin journal diameter” column of “Connecting Rod Bearing Selection Table”.
5. Select connecting rod bearing of the same grade.
Connecting Rod Bearing Selection Table
Unit: mm (in)

Connecting rod big end diameter 57.000 - 57.013 (2.2441 - 2.2446)

Unit: mm (in)

Crankshaft Connecting rod bearing

Crankshaft pin journal diameter Grade (Mark) Dimension (Bearing thickness range) Bearing grade No. Color
53.968 - 53.974 (2.1247 - 2.1250) 0 1.500 - 1.503 (0.0591 - 0.0592) STD 0 Black
53.962 - 53.968 (2.1245 - 2.1247) 1 1.503 - 1.506 (0.0592 - 0.0593) STD 1 Brown
53.956 - 53.962 (2.1242 - 2.1245) 2 1.506 - 1.509 (0.0593 - 0.0594) STD 2 Green

Undersize Bearings Usage Guide

• When the specified connecting rod bearing oil clearance is not obtained with standard size connecting rod
bearings, use undersize (US) bearings.
• When using undersize (US) bearing, measure the connecting rod bearing inner diameter with bearing
installed, and grind crankshaft pin so that the connecting rod bearing oil clearance satisfies the standard.
CAUTION:

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
In grinding crankshaft pin to use undersize bearings, keep the
fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)]. A

EM

PBIC1908E

Bearing undersize table

D
Unit: mm (in)

Size Thickness
E
US 0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643)

HOW TO SELECT MAIN BEARING

When New Cylinder Block and Crankshaft are Used F
1. “Main Bearing Selection Table” rows correspond to bearing
housing grade on rear left side of cylinder block.
G

PBIC2949E

2. “Main Bearing Selection Table” columns correspond to journal J

diameter grade on front side of crankshaft.

M
PBIC2951E

3. Select main bearing grade at the point where selected row and column meet in “Main Bearing Selection
Table”. N
When Cylinder Block and Crankshaft are Reused
1. Measure cylinder block main bearing housing inner diameter and crankshaft main journal diameter. Refer
to EM-112, "Inspection After Disassembly" and EM-112, "Inspection After Disassembly". O
2. Correspond the measured dimension in “Cylinder block main bearing housing inner diameter” row of
“Main Bearing Selection Table”.
3. Correspond the measured dimension in “Crankshaft main journal diameter” column of “Main Bearing P
Selection Table”.
4. Select main bearing grade at the point where selected row and column meet in following selection table.

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
Main Bearing Selection Table

WBIA0625E

Main Bearing Grade Table (All Journals)

Thickness Width
Grade number Identification color Remarks
Unit: mm (in) Unit: mm (in)

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VQ40DE]
0 2.500 - 2.503 (0.0984 - 0.0985) Black
A
1 2.503 - 2.506 (0.0985 - 0.0987) Brown
2 2.506 - 2.509 (0.0987 - 0.0988) Green
3 2.509 - 2.512 (0.0988 - 0.0989) Yellow Grade is the same for
upper and lower bear-
EM
4 2.512 - 2.515 (0.0989 - 0.0990) Blue ings.
5 2.515 - 2.518 (0.0990 - 0.0991) Pink
6 2.518 - 2.521 (0.0991 - 0.0993) Purple C
7 2.521 - 2.524 (0.0993 - 0.0994) White
UPR 2.503 - 2.506 (0.0985 - 0.0987) Brown
01 D
LWR 2.500 - 2.503 (0.0984 - 0.0985) Black
UPR 2.506 - 2.509 (0.0987 - 0.0988) 19.9 - 20.1 Green
12
LWR 2.503 - 2.506 (0.0985 - 0.0987) (0.783 - 0.791) Brown E
UPR 2.509 - 2.512 (0.0988 - 0.0989) Yellow
23
LWR 2.506 - 2.509 (0.0987 - 0.0988) Green
F
UPR 2.512 - 2.515 (0.0989 - 0.0990) Blue Grade is different for
34 upper and lower bear-
LWR 2.509 - 2.512 (0.0988 - 0.0989) Yellow ings.
UPR 2.515 - 2.518 (0.0990 - 0.0991) Pink G
45
LWR 2.512 - 2.515 (0.0989 - 0.0990) Blue
UPR 2.518 - 2.521 (0.0991 - 0.0993) Purple
56 H
LWR 2.515 - 2.518 (0.0990 - 0.0991) Pink
UPR 2.521 - 2.524 (0.0993 - 0.0994) White
67
LWR 2.518 - 2.521 (0.0991 - 0.0993) Purple I
Undersize Bearing Usage Guide
• When the specified main bearing oil clearance is not obtained with standard size main bearings, use under-
side (US) bearing. J
• When using undersize (US) bearing, measure the main bearing inner diameter with bearing installed, and
grind main journal so that the main bearing oil clearance satisfies the standard.
CAUTION: K
In grinding crankshaft main journal to use undersize bearings,
keep the fillet R [1.5 - 1.7 mm (0.059 - 0.067 in)].

N
PBIC1908E

Bearing undersize table

Unit: mm (in)
O
Size Thickness
US 0.25 (0.0098) 2.633 - 2.641 (0.1037 - 0.1040)
P

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and Limit INFOID:0000000005260480

GENERAL SPECIFICATIONS

Cylinder arrangement V-6

3 3,954 (241.30)
Displacement cm (cu in)
Bore and stroke mm (in) 95.5 × 92.0 (3.76 × 3.622)
Valve arrangement DOHC
Firing order 1-2-3-4-5-6
Compression 2
Number of piston rings
Oil 1
Number of main bearings 4
Compression ratio 9.7
Standard 1,275 (13.0, 185)
Compression pressure
Minimum 981 (10.0, 142)
kPa (kg/cm2, psi)/300 rpm
Differential limit between cylinders 98 (1.0, 14)

Cylinder number

SEM713A

Valve timing
(Intake valve timing control - “OFF”)

PBIC0187E

Unit: degree
a b c d e f
244 240 −4 64 6 58

DRIVE BELT

Tension of drive belts Auto adjustment by auto tensioner

INTAKE MANIFOLD COLLECTOR, INTAKE MANIFOLD AND EXHAUST MANIFOLD

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Unit: mm (in)

Items Limit A
Intake manifold collector 0.1 (0.004)
Surface distortion Intake manifold 0.1 (0.004)
EM
Exhaust manifold 0.3 (0.012)

SPARK PLUG
C
Application United States and Canada Mexico
Make NGK
D
Standard type* DILFR5A-11 PLFR5A-11
Gap (nominal) 1.1 mm (0.043 in)
*: Always check with the Parts Department for the latest parts information E

CAMSHAFT AND CAMSHAFT BEARING

Unit: mm (in)
F
Items Standard Limit
No. 1 0.045 - 0.086 (0.0018 - 0.0034)
Camshaft journal oil clearance 0.15 (0.0059)
No. 2, 3, 4 0.035 - 0.076 (0.0014 - 0.0030) G
Camshaft journal length No. 1 27.500 - 27.548 (1.0827 - 1.0846) —
No. 1 26.000 - 26.021 (1.0236 - 1.0244) —
Camshaft bracket inner diameter H
No. 2, 3, 4 23.500 - 23.521 (0.9252 - 0.9260) —
No. 1 25.935 - 25.955 (1.0211 - 1.0218) —
Camshaft journal diameter
No. 2, 3, 4 23.445 - 23.465 (0.9230 - 0.9238) — I
Camshaft end play 0.115 - 0.188 (0.0045 - 0.0074) 0.24 (0.0094)
Intake 45.465 - 45.655 (1.7900 - 1.7974) 45.265 (1.7821)
Camshaft cam height (A) J
Exhaust 45.075 - 45.265 (1.7746 - 1.7821) 44.875 (1.7667)

Camshaft runout [TIR*1] Less than 0.02 (0.0008) 0.05 (0.0020)

Camshaft sprocket runout [TIR*2] — 0.15 (0.0059) K

SEM671

1 O
* : Total indicator reading

Valve Seal
Unit: mm (in) P
Items Standard
Valve seal installed height (H) 14.3 - 14.9 (0.563 - 0.587)

Valve Lifter

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Unit: mm (in)

Items Standard
Valve lifter outer diameter 33.977 - 33.987 (1.3377 - 1.3381)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance 0.013 - 0.039 (0.0005 - 0.0015)

Valve Clearance
Unit: mm (in)

Items Cold Hot* (reference data)

Intake 0.26 - 0.34 (0.010 - 0.013) 0.304 - 0.416 (0.012 - 0.016)
Exhaust 0.29 - 0.37 (0.011 - 0.015) 0.308 - 0.432 (0.012 - 0.017)
*: Approximately 80°C (176°F)

Available Valve Lifter

VQ40DE
Unit: mm (in)

Identification (stamped) mark*

Thickness
Intake Exhaust
788U N788 7.88 (0.3102)
790U N790 7.90 (0.3110)
792U N792 7.92 (0.3118)
794U N794 7.94 (0.3126)
796U N796 7.96 (0.3134)
798U N798 7.98 (0.3142)
800U N800 8.00 (0.3150)
802U N802 8.02 (0.3157)
804U N804 8.04 (0.3165)
806U N806 8.06 (0.3173)
808U N808 8.08 (0.3181)
810U N810 8.10 (0.3189)
812U N812 8.12 (0.3197)
814U N814 8.14 (0.3205)
816U N816 8.16 (0.3213)
818U N818 8.18 (0.3220)
820U N820 8.20 (0.3228)
822U N822 8.22 (0.3236)
824U N824 8.24 (0.3244)
826U N826 8.26 (0.3252)
828U N828 8.28 (0.3260)
830U N830 8.30 (0.3268)
832U N832 8.32 (0.3276)
834U N834 8.34 (0.3283)
836U N836 8.36 (0.3291)
838U — 8.38 (0.3299)

Revision: July 2009 EM-130 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Identification (stamped) mark*
Thickness A
Intake Exhaust
840U — 8.40 (0.3307)

EM

E
SEM758G

*: Always check with the Parts Department for the latest parts information

CYLINDER HEAD F
Unit: mm (in)

Items Standard Limit

G
Head surface distortion Less than 0.03 (0.0012) 0.1 (0.004)
Normal cylinder head height “H” 126.3 - 126.5 (4.972 - 4.980) —
Cylinder head No. 1 camshaft journal bear- 27.360 - 27.385 (1.0772 - 1.0781) — H
ing length

PBIC0924E L
Valve Dimensions
Unit: mm (in)
M

P
SEM188

Valve head diameter “D” Intake 37.0 - 37.3 (1.4567 - 1.4685)

Exhaust 31.2 - 31.5 (1.228 - 1.240)
Intake 96.46 (3.7976)
Valve length “L”
Exhaust 93.99 (3.7004)

Revision: July 2009 EM-131 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Intake 5.965 - 5.980 (0.2348 - 0.2354)
Valve stem diameter “d”
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Intake
Valve seat angle “α” 45°15′ - 45°45′
Exhaust
Intake 1.1 (0.043)
Valve margin “T”
Exhaust 1.3 (0.051)

Valve Guide
Unit: mm (in)

SEM950E

Items Standard 0.2 (0.008) oversize (Service)

Valve guide Outer diameter 10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)
Inner diameter (Finished size) 6.000 - 6.018 (0.2362 - 0.2369)
Cylinder head valve guide hole diameter 9.975 - 9.996 (0.3927 - 0.3935) 10.175 - 10.196 (0.4006 - 0.4014)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023)
Items Standard Limit
Intake 0.020 - 0.053 (0.0008 - 0.0021) 0.08 (0.003)
Valve guide clearance
Exhaust 0.030 - 0.063 (0.0012 - 0.0025) 0.09 (0.004)
Projection length “L” 12.6 - 12.8 (0.496 - 0.504)

Valve Seat
Unit: mm (in)

PBIC2745E

Items Standard Oversize [0.5 (0.020)] (Service)

Intake 38.000 - 38.016 (1.4961 - 1.4967) 38.500 - 38.516 (1.5157 - 1.5164)
Cylinder head seat recess diameter “D”
Exhaust 32.200 - 32.216 (1.2677 - 1.2683) 32.700 - 32.716 (1.2874 - 1.2880)
Intake 38.097 - 38.113 (1.4999 - 1.5005) 38.597 - 38.613 (1.5196 - 1.5202)
Valve seat outer diameter “d”
Exhaust 32.280 - 32.296 (1.2709 - 1.2715) 32.780 - 32.796 (1.2905 - 1.2912)
Intake 0.081 - 0.113 (0.0032 - 0.0044)
Valve seat interference fit
Exhaust 0.064 - 0.096 (0.0025 - 0.0038)

Revision: July 2009 EM-132 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Intake 35 (1.38)
Diameter “d1”*1 A
Exhaust 28.7 (1.130)
Intake 36.3 - 36.8 (1.429 - 1.449)
Diameter “d2”*2
Exhaust 30.3 - 30.8 (1.193 - 1.213) EM
Intake 60°
Angle “α1”
Exhaust 60°
Intake 88°45′ - 90°15′ C
Angle “α2”
Exhaust 88°45′ - 90°15′
Intake 120°
Angle “α3” D
Exhaust 120°
Intake 1.0 - 1.4 (0.039-0.055)
Contacting width “W”*3
Exhaust 1.2 - 1.6 (0.047-0.063) E
Intake 5.9 - 6.0 (0.232 - 0.236) 5.05 - 5.15 (0.1988 - 0.2028)
Height “h”
Exhaust 5.9 - 6.0 (0.232 - 0.236) 4.95 - 5.05 (0.1949 - 0.1988)
F
Depth “H” 6.0 (0.236)

*1: Diameter made by intersection point of conic angles “α1” and “α2”
*2: Diameter made by intersection point of conic angles “α2” and “α3” G
*3
: Machining data

Valve Spring H

Free height mm (in) 47.07 (1.8531)

Installation 166 - 188 (16.9 - 19.2, 37 - 42) at 37.00 (1.4567) I
Pressure N (kg, lb) at height mm (in)
Valve open 373 - 421 (38.0 - 42.9, 84 - 95) at 27.20 (1.0709)
Squareness mm (in) Limit 2.1 (0.083)
J
Spark Plug Tube
Unit: mm (in)

Items Standard
K
Spark plug tube press-fit height (H) 38.1 - 39.1 (1.500 - 1.539)

CYLINDER BLOCK
Unit: mm (in)
L

PBIC2955E
P
Standard Less than 0.03 (0.0012)
Surface flatness
Limit 0.1 (0.004)
Main bearing housing inner diameter Standard 74.993 - 75.017 (2.9525 - 2.9534)
Grade No. 1 95.500 - 95.510 (3.7598 - 3.7602)
Cylinder bore Inner diameter Standard Grade No. 2 95.510 - 95.520 (3.7602 - 3.7606)
Grade No. 3 95.520 - 95.530 (3.7606 - 3.7610)

Revision: July 2009 EM-133 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Out-of-round (Difference between “X” and “Y”) 0.015 (0.0006)
Limit
Taper (Difference between “A” and “C”) 0.01 (0.0004)
Grade No. A 74.993 - 74.994 (2.9525 - 2.9525)
Grade No. B 74.994 - 74.995 (2.9525 - 2.9526)
Grade No. C 74.995 - 74.996 (2.9526 - 2.9526)
Grade No. D 74.996 - 74.997 (2.9526 - 2.9526)
Grade No. E 74.997 - 74.998 (2.9526 - 2.9527)
Grade No. F 74.998 - 74.999 (2.9527 - 2.9527)
Grade No. G 74.999 - 75.000 (2.9527 - 2.9528)
Grade No. H 75.000 - 75.001 (2.9528 - 2.9528)
Grade No. J 75.001 - 75.002 (2.9528 - 2.9528)
Grade No. K 75.002 - 75.003 (2.9528 - 2.9529)
Grade No. L 75.003 - 75.004 (2.9529 - 2.9529)
Grade No. M 75.004 - 75.005 (2.9529 - 2.9529)
Main bearing housing inner diameter (Without bearing)
Grade No. N 75.005 - 75.006 (2.9529 - 2.9530)
Grade No. P 75.006 - 75.007 (2.9530 - 2.9530)
Grade No. R 75.007 - 75.008 (2.9530 - 2.9531)
Grade No. S 75.008 - 75.009 (2.9530 - 2.9531)
Grade No. T 75.009 - 75.010 (2.9531 - 2.9531)
Grade No. U 75.010 - 75.011 (2.9531 - 2.9532)
Grade No. V 75.011 - 75.012 (2.9532 - 2.9532)
Grade No. W 75.012 - 75.013 (2.9532 - 2.9533)
Grade No. X 75.013 - 75.014 (2.9533 - 2.9533)
Grade No. Y 75.014 - 75.015 (2.9533 - 2.9533)
Grade No. 4 75.015 - 75.016 (2.9533 - 2.9534)
Grade No. 7 75.016 - 75.017 (2.9534 - 2.9534)
Difference in inner diameter between cylinders Standard Less than 0.03 (0.0012)

PISTON, PISTON RING AND PISTON PIN

Available Piston
Unit: mm (in)

SEM882E

Items Grade* Standard —

Piston skirt diameter “A” Grade No. 1 95.480 - 95.490 (3.7590 - 3.7594) —
Grade No. 2 95.490 - 95.500 (3.7594 - 3.7598) —
Grade No. 3 95.500 - 95.510 (3.7598 - 3.7602) —
Items Standard Limit
“a” dimension 43.03 (1.6941) —
Grade No. 0 21.993 - 21.999 (0.8659 - 0.8661) —
Piston pin hole diameter
Grade No. 1 21.999 - 22.005 (0.8661 - 0.8663) —
Piston to cylinder bore clearance 0.010 - 0.030 (0.0004 - 0.0012) 0.08 (0.0031)
*: Always check with the Parts Department for the latest parts information

Piston Ring

Revision: July 2009 EM-134 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Unit: mm (in)
Items Standard Limit A
Top 0.045 - 0.080 (0.0018 - 0.0031) 0.11 (0.0043)
Side clearance 2nd 0.030 - 0.070 (0.0012 - 0.0028) 0.10 (0.0039)
EM
Oil ring 0.065 - 0.135 (0.0026 - 0.0053) —
Top 0.23 - 0.33 (0.0091 - 0.0130) 0.56 (0.0220)
End gap 2nd 0.33 - 0.48 (0.0130 - 0.0189) 0.68 (0.0268) C
Oil (rail ring) 0.20 - 0.50 (0.0079 - 0.0197) 0.85 (0.0335)

Piston Pin
D
Unit: mm (in)

Items Grade* Standard Limit

Grade No. 0 21.989 - 21.995 (0.8657 - 0.8659) — E
Piston pin outer diameter
Grade No. 1 21.995 - 22.001 (0.8659 - 0.8662) —
Piston to piston pin oil clearance 0.002 - 0.006 (0.0001 - 0.0002) —
Connecting rod bushing oil clearance 0.005 - 0.017 (0.0002 - 0.0007) 0.030 (0.0012)
F

*: Always check with the Parts Department for the latest parts information

CONNECTING ROD G
Unit: mm (in)

Items Grade1 Standard Limit

H
Center distance 165.82 - 165.92 (6.5283 - 6.5323) —
Bend [per 100 (3.94)] — 0.15 (0.0059)
Torsion [per 100 (3.94)] — 0.30 (0.0118) I
Grade No. 0 22.000 - 22.006 (0.8661 - 0.8664) —
Connecting rod bushing inner diameter2
Grade No. 1 22.006 - 22.012 (0.8664 - 0.8666) —
J
Connecting rod big end diameter (Without bearing) 57.000 - 57.013 (2.2441 - 2.2446) —
Side clearance 0.20 - 0.35 (0.0079 - 0.0138) 40 (0.0157)
1: Always check with the Parts Department for the latest parts information K
2
: After installing in connecting rod

CRANKSHAFT L
Unit: mm (in)

SEM645 SBIA0535E
P

Revision: July 2009 EM-135 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]

Grade1 Dimension
Grade No. A 69.975 - 69.974 (2.7549 - 2.7549)
Grade No. B 69.974 - 69.973 (2.7549 - 2.7548)
Grade No. C 69.973 - 69.972 (2.7548 - 2.7548)
Grade No. D 69.972 - 69.971 (2.7548 - 2.7548)
Grade No. E 69.971 - 69.970 (2.7548 - 2.7547)
Grade No. F 69.970 - 69.969 (2.7547 - 2.7547)
Grade No. G 69.969 - 69.968 (2.7547 - 2.7546)
Grade No. H 69.968 - 69.967 (2.7546 - 2.7546)
Grade No. J 69.967 - 69.966 (2.7546 - 2.7546)
Grade No. K 69.966 - 69.965 (2.7546 - 2.7545)
Grade No. L 69.965 - 69.964 (2.7545 - 2.7545)
Main journal diameter. “Dm” grade Standard Grade No. M 69.964 - 69.963 (2.7545 - 2.7544)
Grade No. N 69.963 - 69.962 (2.7544 - 2.7544)
Grade No. P 69.962 - 69.961 (2.7544 - 2.7544)
Grade No. R 69.961 - 69.960 (2.7544 - 2.7543)
Grade No. S 69.960 - 69.959 (2.7543 - 2.7543)
Grade No. T 69.959 - 69.958 (2.7543 - 2.7542)
Grade No. U 69.958 - 69.957 (2.7542 - 2.7542)
Grade No. V 69.957 - 69.956 (2.7542 - 2.7542)
Grade No. W 69.956 - 69.955 (2.7542 - 2.7541)
Grade No. X 69.955 - 69.954 (2.7541 - 2.7541)
Grade No. Y 69.954 - 69.953 (2.7541 - 2.7540)
Grade No. 4 69.953 - 69.952 (2.7540 - 2.7540)
Grade No. 7 69.952 - 69.951 (2.7540 - 2.7540)
Grade No. 0 53.968 - 53.974 (2.1247 - 2.1250)
Pin journal diameter. “Dp” grade Standard Grade No. 1 53.962 - 53.968 (2.1245 - 2.1247)
Grade No. 2 53.956 - 53.962 (2.1242 - 2.1245)
Center distance “r” 45.96 - 46.04 (1.8094 - 1.8126)
Taper (Difference between “A” and “B”) 0.002 (0.0001)
Limit
Out-of-round (Difference between “X” and “Y”) 0.002 (0.0001)
Standard Less than 0.05 (0.002)
Crankshaft runout [TIR2]
Limit 0.10 (0.0039)
Standard 0.10 - 0.25 (0.0039 - 0.0098)
Crankshaft end play
Limit 0.30 (0.0118)
1: Always check with the Parts Department for the latest parts information
2
: Total indicator reading

MAIN BEARING

PBIC2969E

Grade number* UPR/LWR Thickness mm (in) Width mm (in) Identification color Remarks

Revision: July 2009 EM-136 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
0 — 2.500 - 2.503 (0.0984 - 0.0985) Black
A
1 — 2.503 - 2.506 (0.0985 - 0.0987) Brown
2 — 2.506 - 2.509 (0.0987 - 0.0988) Green
3 — 2.509 - 2.512 (0.0988 - 0.0989) Yellow Grade is the same
for upper and lower
EM
4 — 2.512 - 2.515 (0.0989 - 0.0990) Blue bearings.
5 — 2.515 - 2.518 (0.0990 - 0.0991) Pink
6 — 2.518 - 2.521 (0.0991 - 0.0993) Purple C
7 — 2.521 - 2.524 (0.0993 - 0.0994) White
UPR 2.503 - 2.506 (0.0985 - 0.0987) Brown
01 D
LWR 2.500 - 2.503 (0.0984 - 0.0985) Black
UPR 2.506 - 2.509 (0.0987 - 0.0988) 19.9 - 20.1 Green
12
LWR 2.503 - 2.506 (0.0985 - 0.0987) (0.783 - 0.791) Brown E
UPR 2.509 - 2.512 (0.0988 - 0.0989) Yellow
23
LWR 2.506 - 2.509 (0.0987 - 0.0988) Green
F
UPR 2.512 - 2.515 (0.0989 - 0.0990) Blue Grade is different for
34 upper and lower
LWR 2.509 - 2.512 (0.0988 - 0.0989) Yellow bearings.
UPR 2.515 - 2.518 (0.0990 - 0.0991) Pink G
45
LWR 2.512 - 2.515 (0.0989 - 0.0990) Blue
UPR 2.518 - 2.521 (0.0991 - 0.0993) Purple
56 H
LWR 2.515 - 2.518 (0.0990 - 0.0991) Pink
UPR 2.521 - 2.524 (0.0993 - 0.0994) White
67
LWR 2.518 - 2.521 (0.0991 - 0.0993) Purple I
*Always check with the Parts Department for the latest parts information

Undersize
Unit: mm (in)
J

Items Thickness Main journal diameter

0.25 (0.0098) 2.633 - 2.641 (0.1037 - 0.1040) Grind so that bearing clearance is the specified value. K
Main Bearing Oil Clearance
Unit: mm (in)
L
Items Standard Limit
Main bearing oil clearance 0.035 - 0.045 (0.0014 - 0.0018)* 0.065 (0.0026)
*: Actual clearance M
CONNECTING ROD BEARING

Grade number* Thickness mm (in) Identification color (mark) N

0 1.500 - 1.503 (0.0591 - 0.0592) Black
1 1.503 - 1.506 (0.0592 - 0.0593) Brown
O
2 1.506 - 1.509 (0.0593 - 0.0594) Green
*: Always check with the Parts Department for the latest parts information

Undersize P
Unit: mm (in)

Items Thickness Crank pin journal diameter

0.25 (0.0098) 1.626 - 1.634 (0.0640 - 0.0643) Grind so that bearing clearance is the specified value.

Connecting Rod Bearing Oil Clearance

Revision: July 2009 EM-137 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VQ40DE]
Unit: mm (in)

Items Standard Limit

Connecting rod bearing oil clearance 0.034 - 0.059 (0.0013 - 0.0023)* 0.070 (0.0028)
*: Actual clearance

Revision: July 2009 EM-138 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VK56DE]

PRECAUTION A
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT EM
PRE-TENSIONER" INFOID:0000000005531975

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along C
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. D
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING: E
• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
F
• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal
injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this G
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS H
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a I
hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the J
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005260482 K
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM). L
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work. M
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and N
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation. O
OPERATION PROCEDURE
1. Connect both battery cables.
NOTE: P
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.

Revision: July 2009 EM-139 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VK56DE]
5. When the repair work is completed, return the ignition switch to the ″LOCK″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of all control units using CONSULT-III.
Precaution for Drain Engine Coolant INFOID:0000000005260483

Drain engine coolant when engine is cooled.

Precaution for Disconnecting Fuel Piping INFOID:0000000005260484

• Before starting work, make sure no fire or spark producing items are in the work area.
• Release fuel pressure before disconnecting and disassembly.
• After disconnecting pipes, plug openings to stop fuel leakage.
Precaution for Removal and Disassembly INFOID:0000000005260485

• When instructed to use special service tools, use the specified tools. Always be careful to work safely, avoid
forceful or uninstructed operations.
• Exercise maximum care to avoid damage to mating or sliding surfaces.
• Cover openings of engine system with tape or the equivalent, if necessary, to seal out foreign materials.
• Mark and arrange disassembly parts in an organized way for easy troubleshooting and assembly.
• When loosening nuts and bolts, as a basic rule, start with the one furthest outside, then the one diagonally
opposite, and so on. If the order of loosening is specified, do exactly as specified. Power tools may be used
where noted in the step.
Precaution for Inspection, Repair and Replacement INFOID:0000000005260486

Before repairing or replacing, thoroughly inspect parts. Inspect new replacement parts in the same way, and
replace if necessary.
Precaution for Assembly and Installation INFOID:0000000005260487

• Use torque wrench to tighten bolts or nuts to specification.

• When tightening nuts and bolts, as a basic rule, equally tighten in several different steps starting with the
ones in center, then ones on inside and outside diagonally in this order. If the order of tightening is specified,
do exactly as specified.
• Replace with new gasket, packing, oil seal or O-ring.
• Thoroughly wash, clean, and air-blow each part. Carefully check engine oil or engine coolant passages for
any restriction and blockage.
• Avoid damaging sliding or mating surfaces. Completely remove foreign materials such as cloth lint or dust.
Before assembly, oil sliding surfaces well.
• Release air within route when refilling after draining engine coolant.
• Before starting engine, apply fuel pressure to fuel lines with turning ignition switch ON (with engine stopped).
Then make sure that there are no leaks at fuel line connections.
• After repairing, start engine and increase engine speed to check engine coolant, fuel, engine oil, and
exhaust systems for leakage.
Parts Requiring Angular Tightening INFOID:0000000005260488

• For final tightening of the following engine parts use Tool:

Tool number : KV10112100 (BT-8653-A)

- Cylinder head bolts
- Main bearing cap bolts
- Connecting rod cap bolts
- Crankshaft pulley bolt (No angle wrench is required as the bolt flange is provided with notches for angle
tightening)
• Do not use a torque value for final tightening.
• The torque value for these parts are for a preliminary step.
• Ensure thread and seat surfaces are clean and lightly coated with engine oil.

Revision: July 2009 EM-140 2010 Pathfinder

 PRECAUTIONS
< PRECAUTION > [VK56DE]
Precaution for Liquid Gasket INFOID:0000000005260489

A
REMOVAL OF LIQUID GASKET SEALING
• After removing nuts and bolts, separate the mating surface and
remove old liquid gasket sealing using Tool. EM

Tool number : KV10111100 (J-37228)

CAUTION: C
Be careful not to damage the mating surfaces.
• Tap seal cutter to insert it (1), and then slide it by tapping on the
side (2) as shown. D
• In areas where Tool is difficult to use, use plastic hammer to lightly
tap the part, to remove it.
CAUTION: WBIA0566E

If for some unavoidable reason tool such as screwdriver is E

used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
F
1. Remove the old liquid gasket adhering to the gasket application
surface and the mating surface using suitable tool.
• Remove the liquid gasket completely from the groove of the
liquid gasket application surface, bolts, and bolt holes. G
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign material.
H

I
PBIC0003E

3. Attach the liquid gasket tube to the Tool.

J
Tool number : WS39930000 ( — )
Use Genuine RTV Silicone Sealant or equivalent. Refer to K
GI-14, "Recommended Chemical Products and Sealants".
4. Apply the liquid gasket without breaks to the specified location
with the specified dimensions.
L

WBIA0567E
M

• If there is a groove for the liquid gasket application, apply the

liquid gasket to the groove.
• As for the bolt holes, normally apply the liquid gasket inside N
the holes. If specified in the procedure, it should also be
applied outside the holes.
• Within five minutes of liquid gasket application, install the mat- O
ing component.
• If the liquid gasket protrudes, wipe it off immediately.
• Do not retighten nuts or bolts after the installation.
P
• Wait 30 minutes or more after installation before refilling the
engine with engine oil and engine coolant.
SEM159F
CAUTION:
If there are specific instructions in this manual, observe them.

Revision: July 2009 EM-141 2010 Pathfinder

 PREPARATION
< PREPARATION > [VK56DE]

PREPARATION
PREPARATION
Special Service Tool INFOID:0000000005260490

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
16441 6N210 Removing fuel tube quick connectors in en-
(J-45488) gine room
Quick connector release (Available in SEC. 164 of PARTS CATALOG:
Part No. 16441 6N210)

PBIC0198E

— Releasing drive belt tension

(J-46535)
Drive belt tension releaser

WBIA0536E

KV10111100 Removing steel oil pan and rear timing chain

(J-37228) case
Seal cutter

S-NT046

WS39930000 Pressing the tube of liquid gasket

( — )
Tube presser

S-NT052

— Loosening or tightening air fuel ratio A/F sen-

(J-44626) sor
Air fuel sensor Socket a: 22 mm (0.87 in)

LBIA0444E

EG15050500 Inspecting compression pressure

(J-45402)
Compression gauge adapter

ZZA1225D

Revision: July 2009 EM-142 2010 Pathfinder

 PREPARATION
< PREPARATION > [VK56DE]
Tool number Description
(Kent-Moore No.) A
Tool name
KV10116200 Disassembling valve mechanism
(J-26336-B) Part (1) is a component of KV10116200 (J- EM
Valve spring compressor 26336-B), but part (2) is not.
1. KV10115900
(J-26336-20)
Attachment C
2. KV10109220
( — )
Adapter PBIC1650E
D
KV10107902 Removing valve oil seal
(J-38959)
Valve oil seal puller
E

F
S-NT011

KV10115600 Installing valve oil seal

(J-38958) Use side A.
Valve oil seal drift a: 20 (0.79) dia. d: 8 (0.31) dia. G
b: 13 (0.51) dia. e: 10.7 (0.421) dia.
c: 10.3 (0.406) dia. f: 5 (0.20) dia.
Unit: mm (in)
H

S-NT603

EM03470000 Installing piston assembly into cylinder bore I

(J-8037)
Piston ring compressor

S-NT044 K
KV10112100 Tightening bolts for cylinder head, main bear-
(BT-8653-A) ing cap and connecting rod cap
Angle wrench
L

M
S-NT014

ST16610001 Removing crankshaft pilot bushing

(J-23907) N
Pilot bushing puller

S-NT045

— Removing and installing crankshaft pulley P

(J-47245)
Ring gear stopper

LBIA0451E

Revision: July 2009 EM-143 2010 Pathfinder

 PREPARATION
< PREPARATION > [VK56DE]
Commercial Service Tool INFOID:0000000005260491

(Kent-Moore No.) Description

Tool name
Power tool Loosening bolts and nuts

PBIC0190E

Spark plug wrench Removing and installing spark plug

S-NT047

(J-24239-01) Loosening and tightening cylinder head bolt,

Cylinder head bolt wrench and use with angle wrench [SST: KV10112100
(BT-8653-A)]
a: 13 (0.51) dia.
b: 12 (0.47)
c: 10 (0.39)
Unit: mm (in)
NT583

Valve seat cutter set Finishing valve seat dimensions

S-NT048

Pulley puller Removing crankshaft pulley

ZZA0010D

Piston ring expander Removing and installing piston ring

S-NT030

Revision: July 2009 EM-144 2010 Pathfinder

 PREPARATION
< PREPARATION > [VK56DE]
(Kent-Moore No.) Description
Tool name A
Valve guide drift Removing and installing valve guide
Intake & Exhaust:
a: 9.5 mm (0.374 in) dia. EM
b: 5.5 mm (0.217 in) dia.

C
S-NT015

Valve guide reamer 1: Reaming valve guide hole

2: Reaming hole for oversize valve guide D
Intake & Exhaust:
d1 : 6.0 mm (0.236 in) dia.
d2 : 10.175 - 10.196 mm (0.4006 - 0.4014 in)
dia.
E

S-NT016
F
Front oil seal drift Installing front oil seal

H
ZZA0012D

Rear oil seal drift Installing rear oil seal

ZZA0025D

(J-43897-18) Reconditioning the exhaust system threads K

(J-43897-12) before installing a new Air Fuel Ratio sensor
Oxygen sensor thread cleaner and heated oxygen sensor (Use with anti-
seize lubricant shown below.)
a: J-43897-18 (18 mm dia.) (0.71 in) L
b: J-43897-12 (12 mm dia.) (0.55 in)

AEM488 M
Anti-seize lubricant (Permatex 133AR Lubricating A/F sensors and heated oxygen
or equivalent meeting MIL specifica- sensor thread cleaning tool when recondition-
tion MIL-A-907) ing exhaust system threads
N

O
AEM489

Revision: July 2009 EM-145 2010 Pathfinder

 NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
< FUNCTION DIAGNOSIS > [VK56DE]

FUNCTION DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting - Engine Noise INFOID:0000000005260492

AWBIA0149ZZ

Revision: July 2009 EM-146 2010 Pathfinder

 NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
< FUNCTION DIAGNOSIS > [VK56DE]

1. Timing chain 2. Intake valve 3. Exhaust valve A

4. Drive belt 5. Water pump A. VTC noise
B. Tappet noise C. Camshaft bearing noise D. Valve mechanism
E. Rotation mechanism F. Piston pin noise G. Piston slap noise EM
H. Main bearing noise I. Connecting rod bearing noise J. Drive belt noise (slipping)
K. Drive belt noise (stick/slipping) L. Water pump noise M. Timing chain and chain tensioner noise
C
Use the Chart Below to Help You Find the Cause of the Symptom INFOID:0000000005260493

1. Locate the area where noise occurs.

D
2. Confirm the type of noise.
3. Specify the operating condition of engine.
4. Check specified noise source. E
If necessary, repair or replace these parts.

Operating condition of engine

F
Location of Type of Be- Source of Refer-
After When While Check item
noise noise fore When When noise ence page
warm- start- driv-
warm- idling racing
up ing ing G
up
Top of en- Ticking or
C A — A B — Tappet noise Valve clearance EM-208
gine clicking
Rocker cov- H
er Camshaft journal clear-
Camshaft EM-198
Cylinder Rattle C A — A B C ance
bearing noise EM-198
head Camshaft runout
I
Piston and piston pin
Slap or Piston pin clearance EM-226
— A — B B —
knock noise Connecting rod bushing EM-226
clearance J
Piston-to-bore clear-
ance
EM-226
Piston ring side clear-
Crankshaft Slap or Piston slap EM-226 K
A — — B B A ance
pulley rap noise EM-226
Piston ring end gap
Cylinder EM-226
Connecting rod bend
block (Side and torsion L
of engine)
Oil pan Connecting rod bushing
Connecting oil clearance (Small
EM-226
Knock A B C B B B rod bearing end)
EM-226 M
noise Connecting rod bearing
clearance (Big end)
Main bearing oil clear-
Main bearing EM-226 N
Knock A B — A B C ance
noise EM-226
Crankshaft runout
Front of en-
Timing chain Timing chain cracks
gine O
Tapping and chain and wear EM-181
Chain case A A — B B B
or ticking tensioner Timing chain tensioner EM-181
cover
noise operation
Front cover
P

Revision: July 2009 EM-147 2010 Pathfinder

 NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
< FUNCTION DIAGNOSIS > [VK56DE]
Operating condition of engine

Location of Type of Be- Source of Refer-

After When While Check item
noise noise fore When When noise ence page
warm- start- driv-
warm- idling racing
up ing ing
up
Squeak- Drive belts
ing or A B — B — C (Sticking or Drive belts deflection
fizzing slipping) EM-149
Front of en- Drive belts Idler pulley bearing op-
gine Creaking A B A B A B
(Slipping) eration
Squall Water pump
A B — B A B Water pump operation CO-51
Creaking noise
Rattle — — A — — — VTC VTC lock pin clearance EM-198
A: Closely related B: Related C: Sometimes related —: Not related

Revision: July 2009 EM-148 2010 Pathfinder

 DRIVE BELTS
< ON-VEHICLE MAINTENANCE > [VK56DE]

ON-VEHICLE MAINTENANCE A
DRIVE BELTS
Exploded View INFOID:0000000005260494
EM

LBIA0391E
H
1. Drive belt 2. Power steering pump pulley 3. Generator pulley
4. Crankshaft pulley 5. A/C compressor 6. Idler pulley
7. Cooling fan pulley 8. Water pump pulley 9. Drive belt auto tensioner I
A. Allowable working range

Checking Drive Belts INFOID:0000000005260495

J

WARNING:
Be sure to perform when the engine is stopped.
K
1. Remove air duct and resonator assembly when inspecting drive belt.
2. Make sure that indicator (single line notch) of each auto tensioner is within the allowable working range
(between three line notches). L
NOTE:
• Check the drive belt auto tensioner indication when the engine is cold.
• The indicator notch is located on the moving side of the drive belt auto tensioner.
3. Visually check entire belt for wear, damage or cracks. M
4. If the indicator is out of allowable working range or belt is damaged, replace the belt. Refer to EM-149,
"Removal and Installation".
N
Adjustment INFOID:0000000005260496

There is no manual drive belt tension adjustment. The drive belt tension is automatically adjusted by the drive
belt auto tensioner. O

Removal and Installation INFOID:0000000005260497

P
REMOVAL
1. Remove the air duct and resonator assembly. Refer to EM-161, "Removal and Installation".

Revision: July 2009 EM-149 2010 Pathfinder

 DRIVE BELTS
< ON-VEHICLE MAINTENANCE > [VK56DE]
2. Install Tool on drive belt auto tensioner pulley bolt, move in the
direction of arrow (loosening direction of tensioner) as shown.

Tool number : — (J-46535)

WARNING:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
3. Remove the drive belt.

WBIA0537E

INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Make sure belt is securely installed around all pulleys.
• Rotate the crankshaft pulley several turns clockwise to equalize belt tension between pulleys.
• Make sure belt tension is within the allowable working range, using the indicator notch on the drive belt auto
tensioner. Refer to EM-149, "Checking Drive Belts".

Drive Belt Auto Tensioner and Idler Pulley INFOID:0000000005260498

WBIA0607E

1. Drive belt auto tensioner 2. Idler pulley

REMOVAL
1. Remove the drive belt. Refer to EM-149, "Removal and Installation".
2. Remove the drive belt auto tensioner and idler pulley using power tool.
INSTALLATION
Installation is in the reverse order of removal.

Revision: July 2009 EM-150 2010 Pathfinder

 AIR CLEANER FILTER
< ON-VEHICLE MAINTENANCE > [VK56DE]
AIR CLEANER FILTER
A
Exploded View INFOID:0000000005260499

EM

G
ALBIA0413GB

1. Air cleaner case (lower) 2. Air cleaner filter 3. Air cleaner case (upper)
4. Air duct and resonator assembly Front
H

Removal and Installation INFOID:0000000005260500

I
REMOVAL
NOTE:
• The viscous paper type filter does not need cleaning between replacement intervals. J
• Replace the air filter as necessary for periodic maintenance. Refer to MA-9, "For North America".
1. Unhook clips, and lift air cleaner case (upper).
2. Remove the air cleaner filter. K
INSTALLATION
1. Installation is in the reverse order of removal. L

Revision: July 2009 EM-151 2010 Pathfinder

 SPARK PLUG
< ON-VEHICLE MAINTENANCE > [VK56DE]
SPARK PLUG
Exploded View INFOID:0000000005260501

WBIA0796E

1. Ignition coil 2. Spark plug

Removal and Installation INFOID:0000000005260502

REMOVAL
1. Remove ignition coil. Refer to EM-173, "Removal and Installation".
2. Remove spark plug using suitable tool.
CAUTION:
Do not drop or shock it.

SEM294A

INSPECTION AFTER REMOVAL

• Do not use a wire brush for cleaning.

• If the spark plug tip is covered with carbon, a spark plug cleaner
may be used.

Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/
cm2, 85 psi)
Cleaning time : Less than 20 seconds

SMA773C

Revision: July 2009 EM-152 2010 Pathfinder

 SPARK PLUG
< ON-VEHICLE MAINTENANCE > [VK56DE]
• Checking and adjusting spark plug gap is not required between
change intervals. A

EM

SMA806CA

D
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Do not drop or shock spark plug. E

Make NGK
Standard type* DILFR5A-11 F
Gap (Nominal) 1.1 mm (0.043 in)
*: Always check with the Parts Department for the latest parts information
G

Revision: July 2009 EM-153 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VK56DE]
CAMSHAFT VALVE CLEARANCE
Valve Clearance INFOID:0000000005260503

INSPECTION
NOTE:
Perform the following inspection after removal, installation or replacement of camshaft or valve-related parts,
or if there are unusual engine conditions due to changes in valve clearance over time (starting, idling, and/or
noise).
1. Warm up the engine. Then stop the engine.
2. Remove the engine room cover. Refer to EM-160, "Removal and Installation".
3. Remove the air cleaner and air duct assembly. Refer to EM-161, "Exploded View".
4. Remove the RH bank and LH bank rocker covers using power tool. Refer to EM-174, "Removal and
Installation".
5. Turn the crankshaft pulley in the normal direction (clockwise
when viewed from engine front) to align TDC identification notch
(without paint mark) with timing indicator.

KBIA2476E

6. At this time, make sure both the intake and exhaust cam noses
of No. 1 cylinder (top front on LH bank) face outside.
• If they do not face outside, turn crankshaft pulley once more.

KBIA0400J

Revision: July 2009 EM-154 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VK56DE]
7. Measure valve clearances at the locations marked “×” as shown
in the table below (locations indicated with black arrow). A
• : Engine front
• (black): Measurable at No.1 cylinder compression top dead
center EM
• (white): Measurable at No. 3 cylinder compression top
dead center
• A: RH
• B: LH C
• C: Exhaust
• D: Intake
NOTE: D
Firing order 1-8-7-3-6-5-4-2
• No. 1 cylinder compression TDC
E
No. 2 cyl No. 4 cyl No. 6 cyl No. 8 cyl
Measuring position (RH bank)
(E) (F) (G) (H)
EXH ×
No. 1 cylinder at TDC F
INT × ×
No. 1 cyl No. 3 cyl No. 5 cyl No. 7 cyl
Measuring position (LH bank)
(J) (K) (L) (M)
G
INT × × WBIA0713E
No. 1 cylinder at TDC
EXH × ×
H
• Measure valve clearance using suitable tool. Refer to EM-244,
"Standard and Limit".
CAUTION: I
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.
J

K
KBIA0185E

8. Turn the crankshaft pulley clockwise 270° from the position of No. 1 cylinder compression TDC to obtain L
No. 3 cylinder compression TDC.

Revision: July 2009 EM-155 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VK56DE]
9. Measure valve clearances at the locations marked “×” as shown
in the table below (locations indicated with white arrow).
• : Engine front
• (black): Measurable at No.1 cylinder compression top dead
center
• (white): Measurable at No. 3 cylinder compression top
dead center
• A: RH
• B: LH
• C: Exhaust
• D: Intake
NOTE:
Firing order 1-8-7-3-6-5-4-2
• No. 3 cylinder compression TDC

No. 2 cyl No. 4 cyl No. 6 cyl No. 8 cyl

Measuring position (RH bank)
(E) (F) (G) (H)
EXH ×
No. 3 cylinder at TDC
INT ×
No. 1 cyl No. 3 cyl No. 5 cyl No. 7 cyl
Measuring position (LH bank)
(J) (K) (L) (M)
INT × × WBIA0713E
No. 3 cylinder at TDC
EXH × ×

• Measure valve clearance using suitable tool. Refer to EM-244,

"Standard and Limit".
CAUTION:
If the inspection was carried out with a cold engine, make
sure the values with a fully warmed up engine are still
within specifications.

KBIA0185E

Revision: July 2009 EM-156 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VK56DE]
10. Turn the crankshaft pulley clockwise 90° from the position of No.
3 cylinder compression TDC (clockwise by 360° from the posi- A
tion of No. 1 cylinder compression TDC) to measure the intake
and exhaust valve clearances of No. 6 cylinder (G) and the
exhaust valve clearance of No. 2 cylinder (E).
EM
• : Front
• A: RH
• B: LH
• C: Exhaust C
• D: Intake
• E: No. 2 cylinder
• F: No. 4 cylinder D
• G: No. 6 cylinder
• H: No. 8 cylinder
• J: No. 1 cylinder
• K: No. 3 cylinder E
• L: No. 5 cylinder
• M: No. 7 cylinder
F

G
WBIA0713E

11. If out of specifications, adjust as necessary.

H
ADJUSTMENT
NOTE:
• Perform adjustment depending on the selected head thickness of the valve lifter. I
• The specified valve lifter thickness is the dimension at normal temperatures. Ignore dimensional differences
caused by temperature. Use the specifications for hot engine condition to adjust.
1. Remove the camshaft. Refer to EM-189, "Removal and Installation". J
2. Remove the valve lifters at the locations that are out of specification.
3. Measure the center thickness of the removed valve lifters using
suitable tool. K
4. Use the equation below to calculate the valve lifter thickness for
replacement.
• Valve lifter thickness calculation: L
Thickness of replacement valve lifter = t1+ (C1 - C2)
t1 = Thickness of removed valve lifter
C1 = Measured valve clearance M
C2= Standard valve clearance:

KBIA0057E
N
• Thickness of a new valve lifter can be identified by stamp
marks on the reverse side (inside the cylinder).
Stamp mark N788 indicates 7.88 mm (0.3102 in) in thickness. O
• Available thickness of valve lifter: 25 sizes with range 7.88 to
8.36 mm (0.3102 to 0.3291 in) in steps of 0.02 mm (0.0008 in)
(when manufactured at factory). Refer to EM-244, "Standard P
and Limit".

KBIA0119E

5. Install the selected valve lifter.

Revision: July 2009 EM-157 2010 Pathfinder

 CAMSHAFT VALVE CLEARANCE
< ON-VEHICLE MAINTENANCE > [VK56DE]
6. Install the camshaft.
7. Manually turn the crankshaft pulley a few turns.
8. Make sure the valve clearances for a cold engine are within specifications. Refer to EM-244, "Standard
and Limit".
9. After completing the repair, check the valve clearances again with the specifications for a warmed engine.
Make sure the values are within specifications. Refer to EM-244, "Standard and Limit".

Revision: July 2009 EM-158 2010 Pathfinder

 COMPRESSION PRESSURE
< ON-VEHICLE MAINTENANCE > [VK56DE]
COMPRESSION PRESSURE
A
Compression Pressure INFOID:0000000005260504

CHECKING COMPRESSION PRESSURE EM

1. Warm up the engine thoroughly. Then stop the engine.
2. Release the fuel pressure. Refer to EC-958, "Fuel Pressure Check".
CAUTION: C
If CONSULT-III is not used to release fuel pressure leave the fuel pump fuse disconnected until
step 7.
3. Remove the spark plug from each cylinder. Refer to EM-152, "Removal and Installation". D
4. Connect the engine tachometer (not required in use of CONSULT-III).
5. Install the compression tester with Tool into the spark plug hole.
E
Tool number : EG15050500 (J-45402)
6. With the accelerator pedal fully depressed, turn the ignition
F
switch to “START” for cranking. When the gauge pointer stabi-
lizes, read the compression pressure and engine rpm. Perform
these steps to check each cylinder.
Unit: kPa (kg/cm2, psi) /rpm G
Deference limit be-
Standard Minimum
tween cylinders WBIA0605E

1,520 (15.5, 220) / 200 1,324 (13.5, 192) / 200 98 (1.0, 14) / 200 H

CAUTION:
Always use a fully charged battery to obtain specified engine speed.
I
• If the engine speed is out of the specified range, check the battery liquid for proper gravity. Check the
engine speed again with normal battery gravity.
• If the compression pressure is below the minimum value, check the valve clearances and parts associ-
ated with the combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, J
cylinder head gasket). After checking, measure the compression pressure again.
• If some cylinders have low compression pressure, pour a small amount of engine oil into the spark plug
hole of the cylinder to re-check it for compression. K
- If the added engine oil improves the compression, the piston rings may be worn out or damaged. Check
the piston rings and replace if necessary.
- If the compression pressure remains at a low level despite the addition of engine oil, the valves may be
malfunctioning. Check the valves for damage. Replace the valve or valve seat accordingly. L
• If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, the cylinder head gaskets may be leaking, or a valve in adja-
cent cylinders may be damaged. Inspect and repair as required. M
7. Install the components in the reverse order of removal.
8. Start the engine and confirm that it runs smoothly.
9. Perform trouble diagnosis. If DTC appears, erase it. Refer to EC-566, "Description". N

Revision: July 2009 EM-159 2010 Pathfinder

 ENGINE ROOM COVER
< ON-VEHICLE REPAIR > [VK56DE]

ON-VEHICLE REPAIR
ENGINE ROOM COVER
Removal and Installation INFOID:0000000005260505

CAUTION:
Do not damage or scratch cover when installing or removing.
REMOVAL
• Remove the engine room cover bolts and engine room cover.

ALBIA0414GB

INSTALLATION
Installation is in the reverse order of removal.

Revision: July 2009 EM-160 2010 Pathfinder

 AIR CLEANER AND AIR DUCT
< ON-VEHICLE REPAIR > [VK56DE]
AIR CLEANER AND AIR DUCT
A
Exploded View INFOID:0000000005260506

EM

G
ALBIA0413GB

1. Air cleaner case (lower) 2. Air cleaner filter 3. Air cleaner case (upper)
4. Air duct and resonator assembly Front
H

Removal and Installation INFOID:0000000005260507

I
REMOVAL
CAUTION:
Handle mass air flow sensor with care. J
• Do not shock it.
• Do not disassemble it.
• Do not touch its sensor. K
NOTE:
• Add marks as necessary for easier installation.
1. Remove the engine room cover using power tool. Refer to EM-160, "Removal and Installation".
L
2. Disconnect the harness connector from air cleaner case (upper).
3. Remove the air duct and resonator assembly and air cleaner case (upper).
4. Remove air cleaner filter and air cleaner case (lower). M
INSPECTION AFTER REMOVAL
Inspect air duct and resonator assembly for crack or tear.
• If anything found, replace air duct and resonator assembly. N
INSTALLATION
Installation is in the reverse order of removal.
O

Revision: July 2009 EM-161 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VK56DE]
INTAKE MANIFOLD
Exploded View INFOID:0000000005260508

KBIA2461E

1. Intake manifold 2. PCV hose 3. Gasket

4. Electric throttle control actuator 5. Water hose 6. Water hose
7. PCV hose 8. EVAP hose 9. EVAP canister purge control solenoid valve
10. Bracket 11. Gasket

Removal and Installation INFOID:0000000005260509

REMOVAL
1. Remove the engine under cover. Refer to EXT-14, "Removal and Installation".
2. Partially drain the engine coolant. Refer to CO-40, "Changing Engine Coolant".
WARNING:
To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
3. Release the fuel pressure. Refer to EC-958, "Fuel Pressure Check".
4. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
5. Remove the engine room cover. Refer to EM-160, "Removal and Installation".
6. Remove the air duct and resonator assembly. Refer to EM-161, "Removal and Installation".

Revision: July 2009 EM-162 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VK56DE]
7. Disconnect the fuel tube quick connector on the engine side in
the following steps. A

EM

LBIA0395E

D
a. Remove quick connector cap (engine side only).

G
SBIA0354E

b. With the sleeve side of Tool facing quick connector, install Tool H
onto fuel tube.

Tool number : 16441 6N210 (J-45488) I

c. Insert Tool into quick connector until sleeve contacts and goes
no further. Hold the Tool in that position.
CAUTION: J
Inserting the Tool hard will not disconnect quick connector.
Hold Tool where it contacts and goes no further.
d. Draw and pull out quick connector straight from fuel tube. WBIA0604E K
CAUTION:
• Pull quick connector holding (A) position in illustration.
• Do not pull with lateral force applied. O-ring inside quick connector may be damaged.
• Prepare container and cloth beforehand as fuel will leak out. L
• Avoid fire and sparks.
• Be sure to cover openings of disconnected pipes with plug or plastic bag to avoid fuel leakage
and entry of foreign materials. M
8. Remove or disconnect harnesses, brackets, vacuum hose, vacuum gallery and PCV hose and tube from
intake manifold.
9. Remove the EVAP canister purge control solenoid valve, if necessary. N
10. Remove electric throttle control actuator by loosening bolts diagonally.
CAUTION:
• Handle carefully to avoid any damage to the electric throttle control actuator. O
• Do not disassemble.
11. Remove the fuel injectors and fuel tube assembly. Refer to EM-176, "Removal and Installation".
P

Revision: July 2009 EM-163 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VK56DE]
12. Loosen the bolts in reverse order shown using power tool.
13. Remove the intake manifold.
CAUTION:
Cover engine openings to avoid entry of foreign materials.
• Clean all gasket mating surfaces, do not reuse gaskets.

KBIA2462E

INSTALLATION
Installation is in the reverse order of removal.
• Tighten the intake manifold bolts in numerical order as shown.

KBIA2462E

• Install the EVAP canister purge control solenoid valve connector with it facing front of engine.
• Tighten the electric throttle control actuator bolts of the electric throttle control actuator equally and diago-
nally in several steps.
• After installation perform inspection after installation.
• Install the water hose so that its overlap width for connection is between 27 mm (1.06 in) and 32 mm (1.26
in) (target: 27 mm 1.06 in).
Connecting Quick Connector of Fuel Tube
Install quick connector as follows (the steps are the same for quick connectors on both engine side and vehi-
cle side except for the quick connector cap).
1. Make sure no foreign substances are deposited in and around tube and quick connector, and they are not
damaged.
2. Thinly apply new engine oil around the fuel tube from tip end to the spool end.
3. Align center to insert quick connector straight into fuel tube.
• Insert until the paint mark for engagement identification (white)
goes completely inside quick connector so that you cannot see
it from the straight side of the connected part. Use a mirror to
check this where it is not possible to view directly from the
straight side, such as quick connector on vehicle side.

PBIC0017E

Revision: July 2009 EM-164 2010 Pathfinder

 INTAKE MANIFOLD
< ON-VEHICLE REPAIR > [VK56DE]
• Insert fuel tube into quick connector until top spool is com-
pletely inside quick connector, and 2nd level spool exposes A
right below quick connector on engine side.
CAUTION:
• Hold (A) position in illustration when inserting fuel tube
EM
into quick connector.
• Carefully align center to avoid inclined insertion to pre-
vent damage to O-ring inside quick connector.
• Insert until you hear a "click" sound and actually feel the C
engagement.
• To avoid misidentification of engagement with a similar
KBIA0272E
sound, be sure to perform the next step. D
4. Pull quick connector by hand holding (A) position. Make sure it is completely engaged (connected) so that
it does not come out from fuel tube.
NOTE:
Recommended pulling force is 50 N (5.1 kg, 11.2 lb). E
5. Install the quick connector cap on the quick connector joint (on
engine side only).
6. Install the fuel hose and tube to hose clamps. F
7. Refill the engine coolant. Refer to CO-40, "Changing Engine
Coolant".
G

SBIA0354E

INSPECTION AFTER INSTALLATION I

• After installing fuel tubes, make sure there is no fuel leakage at connections in the following steps.
- Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel
leaks at connections.
J
- Start the engine and rev it up and check for fuel leaks at the connections.
• Perform procedures for “Throttle Valve Closed Position Learning” after finishing repairs. Refer to EC-511,
"Throttle Valve Closed Position Learning".
• If electric throttle control actuator is replaced, perform procedures for “Idle Air Volume Learning” after finish- K
ing repairs. Refer to EC-511, "Idle Air Volume Learning".

Revision: July 2009 EM-165 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VK56DE]
EXHAUST MANIFOLD AND THREE WAY CATALYST
Exploded View INFOID:0000000005260510

AWBIA0706GB

1. Air fuel ratio A/F sensor 1 (RH) 2. Exhaust manifold cover (RH) 3. Exhaust manifold (RH)
4. Gaskets 5. Exhaust manifold (LH) 6. Exhaust manifold cover (LH)
7. Air fuel ratio A/F sensor 1 (LH) A. Up B. Coated face
C. Manifold side D. Up mark Front

Removal and Installation INFOID:0000000005260511

REMOVAL
WARNING:
Perform the work when the exhaust and cooling system have cooled sufficiently.
1. Remove the engine under covers. Refer to EXT-14, "Removal and Installation".
2. Remove front final drive assembly. Refer to DLN-387, "Removal and Installation".
3. Remove the main muffler assembly and center exhaust tube. Refer to EX-7, "Removal and Installation".
4. Remove the front exhaust tubes. Refer to EX-7, "Removal and Installation".
5. Remove front tires. Refer to WT-49, "Rotation".
6. Remove fender protectors. Refer to EXT-23, "Removal and Installation of Front Fender Protector".
7. Remove the LH and RH air fuel ratio A/F sensors.
• Follow steps below to remove each air fuel ratio A/F sensor.
a. Remove the harness connector of each air fuel ratio A/F sensor, and harness from bracket and middle
clamp.

Revision: July 2009 EM-166 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VK56DE]
b. Remove the air fuel ratio A/F sensors from both LH and RH
exhaust manifolds using Tool. A

Tool number : — (J-44626)

CAUTION: EM
• Do not damage the air fuel ratio A/F sensors
• Discard any air fuel ratio A/F sensor which has been
dropped from a height of more than 0.5m (19.7 in) onto a C
hard surface such as a concrete floor. Replace it with a
new one.
WBIA0630E
8. Support the engine using a suitable tool.
D
9. Remove the exhaust manifold (LH) (A) following the steps
below.
• : Front
E
• B: Exhaust manifold (RH)
a. Remove the engine mounting insulator. Refer to EM-214,
"Removal and Installation".
F
b. Remove the exhaust manifold cover.
c. Remove the engine mounting bracket. Refer to EM-214,
"Removal and Installation".
G
d. Loosen the nuts in reverse order as shown using power tool. AWBIA0814ZZ

e. Remove the exhaust manifold (LH) (A).

10. Remove the exhaust manifold (RH) (B) following the steps H
below.
• : Front
• A: Exhaust manifold (LH) I
a. Remove the engine mounting insulator. Refer to EM-214,
"Removal and Installation".
b. Remove the exhaust manifold cover. J
c. Remove the engine mounting bracket. Refer to EM-214,
"Removal and Installation".
d. Remove the oil level gauge guide. Refer to EM-169, "Removal K
AWBIA0814ZZ
and Installation".
e. Loosen the nuts in reverse order as shown using power tool.
f. Remove the exhaust manifold (RH) (B). L

INSPECTION AFTER REMOVAL

Surface Distortion M
• Check the flatness of each exhaust manifold flange surface using
suitable tools.
N
Flatness limit : 0.3 mm (0.012 in)
• If measurement exceeds the limit, replace the exhaust manifold.
O

P
KBIA2504E

INSTALLATION
Installation is in the reverse order of removal.
• Install new exhaust manifold gasket with the top of the triangular up mark on it facing up and its coated face
(gray side) toward the exhaust manifold side.

Revision: July 2009 EM-167 2010 Pathfinder

 EXHAUST MANIFOLD AND THREE WAY CATALYST
< ON-VEHICLE REPAIR > [VK56DE]
• Tighten the exhaust manifold nuts LH and RH in the numerical
order shown. Then recheck the torque of the nuts.
- A: Exhaust manifold (LH)
- B: Exhaust manifold (RH)
- : Front

AWBIA0814ZZ

• Before installing new air fuel ratio A/F sensors, clean the exhaust system threads using suitable tool and
apply anti-seize lubricant.

Oxygen sensor thread cleaner : (J-43879-12)

Oxygen sensor thread cleaner : (J-43897-18)
CAUTION:
• Do not over tighten the air fuel ratio A/F sensors. Doing so may cause damage to the sensor,
resulting in the MIL coming on.

Revision: July 2009 EM-168 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VK56DE]
OIL PAN AND OIL STRAINER
A
Exploded View INFOID:0000000005260512

EM

J
KBIA2465E

1. Oil pan (upper) 2. O-ring 3. O-ring K

4. O-ring 5. O-ring (with collar) 6. Oil level gauge guide
7. Oil level gauge 8. O-ring 9. Connector bolt
10. Oil filter 11. Oil cooler 12. Relief valve L
13. Oil pressure switch 14. Gasket 15. Drain plug
16. Oil pan (lower) 17. Oil strainer
M
Removal and Installation INFOID:0000000005260513

REMOVAL N
WARNING:
To avoid the danger of being scalded, do not drain engine oil when engine is hot.
1. Drain engine oil. Refer to LU-25, "Changing Engine Oil". O
2. Remove the engine. Refer to EM-214, "Removal and Installation".
3. Remove the oil pan (lower) using the following steps.
P

Revision: July 2009 EM-169 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VK56DE]
a. Remove the oil pan (lower) bolts in the reverse order as shown
using power tool.
• : Engine front

AWBIA0832ZZ

b. Insert Tool between the lower oil pan and the upper oil pan.

Tool number : KV10111100 (J-37228)

CAUTION:
• Be careful not to damage the mating surface.
• Do not insert screwdriver, this will damage the mating
surfaces.
c. Tap (1) Tool to insert it and then slide (2) it by tapping on the side
of the Tool as shown.
WBIA0566E

4. Remove the oil strainer from the oil pan (upper).

5. Disconnect the oil cooler water hoses from the oil cooler.
6. Remove the oil cooler, if necessary. Refer to LU-28, "Removal and Installation".
7. Remove the oil pan (upper) using the following steps.
a. Remove the oil pan (upper) bolts as shown.
• : Engine front

AWBIA0833ZZ

b. Remove the oil pan (upper) from the cylinder block by prying it at
the points shown, using suitable tool.
CAUTION:
Do not damage mating surface.

KBIA2468E

Revision: July 2009 EM-170 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VK56DE]
8. Remove the O-rings from the oil pump and front cover.
A

EM

KBIA2469E

D
INSPECTION AFTER REMOVAL
Clean the oil strainer.
INSTALLATION E
1. Install the oil pan (upper) using the following steps.
a. Apply liquid gasket thoroughly as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI- F
14, "Recommended Chemical Products and Sealants".
CAUTION:
Apply liquid gasket to outside of bolt hole for the hole
G
shown by .

H
KBIA2470E

b. Install new O-rings to the oil pump and front cover side. I
NOTE:
Do not reuse O-rings.
J

KBIA2469E L

c. Tighten the bolts in numerical order as shown.

M
M6 × 30 mm (1.18 in) : No. 16, 17
M8 × 25 mm (0.98in) : No. 1, 3, 5, 7, 9, 13, 15
M8 × 45 mm (1.77 in) : No. 2, 4, 6, 8, 10, 14 N
M8 × 123 mm (4.84in) : No. 11, 12
2. Install the oil strainer to the oil pan (upper).
O

PBIC2553E

3. Install the oil cooler, if removed. Refer to LU-28, "Removal and Installation". P
4. Install the oil cooler hoses to the oil cooler.

Revision: July 2009 EM-171 2010 Pathfinder

 OIL PAN AND OIL STRAINER
< ON-VEHICLE REPAIR > [VK56DE]
5. Install the oil pan (lower).
a. Apply liquid gasket thoroughly as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants"
CAUTION:
Attaching should be done within 5 minutes after coating.

KBIA2471E

b. Tighten the oil pan (lower) bolts in numerical order as shown.

PBIC2595E

6. Install the oil pan drain plug.

7. Install engine assembly. Refer to EM-214, "Removal and Installation".
• Do not fill the engine with oil for at least 30 minutes after oil pan is installed.
INSPECTION AFTER INSTALLATION
1. Check engine oil level and add engine oil if necessary. Refer to LU-24, "Inspection".
2. Start the engine, and check for leaks of engine oil.
3. Stop engine and wait for 10 minutes.
4. Check engine oil level again.

Revision: July 2009 EM-172 2010 Pathfinder

 IGNITION COIL
< ON-VEHICLE REPAIR > [VK56DE]
IGNITION COIL
A
Exploded View INFOID:0000000005260514

EM

G
WBIA0796E

1. Ignition coil 2. Spark plug

H
Removal and Installation INFOID:0000000005260515

REMOVAL I
1. Remove the engine room cover. Refer to EM-160, "Removal and Installation".
2. Remove the air duct and resonator assembly. Refer to EM-161, "Removal and Installation".
3. Disconnect the harness connector from the ignition coil. J
4. Remove the ignition coil.
CAUTION:
Do not shock ignition coil. K

INSTALLATION
Installation is in the reverse order of removal.
L

Revision: July 2009 EM-173 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VK56DE]
ROCKER COVER
Exploded View INFOID:0000000005260516

KBIA2508E

1. Rocker cover (LH) 2. PCV control valve 3. O-ring

4. Rocker cover gasket (LH) 5. Rocker cover (RH) 6. PCV control valve
7. O-ring 8. Oil filler cap 9. Rocker cover gasket (RH)

Removal and Installation INFOID:0000000005260517

REMOVAL
1. Remove the engine room cover. Refer to EM-160, "Removal and Installation".
2. Move the harness on the upper rocker cover and its peripheral aside.
3. Remove the ignition coils. Refer to EM-173, "Removal and Installation".
4. Remove the PCV hose from the PCV control valves.
5. Loosen the rocker cover bolts in reverse order shown using
power tool.
• : Engine front
• A: Rocker cover (LH)
• B: Rocker cover (RH)
CAUTION:
Do not hold the rocker cover (RH) (B) by the oil filler neck.

WBIA0697E

INSTALLATION

Revision: July 2009 EM-174 2010 Pathfinder

 ROCKER COVER
< ON-VEHICLE REPAIR > [VK56DE]
1. Apply liquid gasket to the joint part of the cylinder head and
camshaft bracket following the steps below. A
NOTE:
Illustration shows an example of (LH) side (zoomed in shows
No.1 camshaft bracket).
EM
a. Apply liquid gasket to the joint part of No.1 camshaft bracket and
cylinder head "a".
b. Apply liquid gasket 90° "b" to illustration ″a″.
C
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

G
KBIA2510E

2. Install the rocker cover and tighten the bolts in two steps in the
order shown. H
• : Engine front
• A: Rocker cover (LH)
• B: Rocker cover (RH) I
CAUTION:
• Do not hold the rocker cover (RH) (B) by the oil filler neck.
• Make sure the new rocker cover gasket is installed in the
J
groove of the rocker cover.

1st step : 2.0 N·m (0.2 kg-m, 18 in-lb) WBIA0697E

K
2nd step : 8.3 N·m (0.85 kg-m, 73 in-lb)
3. Install the PCV hoses.
NOTE: L
• Remove foreign materials from inside the hose using compressed air.
• The inserted length is within 25 - 30 mm (0.98 - 1.18 in) [Target: 25 mm (0.98 in)].
4. Installation of the remaining components is in the reverse order of removal. M

Revision: July 2009 EM-175 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VK56DE]
FUEL INJECTOR AND FUEL TUBE
Exploded View INFOID:0000000005260518

KBIA2472E

1. Fuel tube (RH) 2. Cap 3. Fuel damper

4. O-ring 5. O-ring (blue) 6. Fuel injector
7. Clip 8. O-ring (brown) 9. O-ring
10. Fuel hose assembly 11. Fuel tube (LH)

Removal and Installation INFOID:0000000005260519

CAUTION:
Do not remove or disassemble parts unless instructed as shown.
REMOVAL
WARNING:
• Put a “CAUTION FLAMMABLE” sign in the workshop.
• Be sure to work in a well ventilated area and furnish workshop with a CO2 fire extinguisher.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from the work area.
• To avoid the danger of being scalded, do not drain engine coolant when engine is hot.
1. Remove the engine room cover. Refer to EM-160, "Removal and Installation".
2. Release the fuel pressure. Refer to EC-958, "Fuel Pressure Check".
3. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
4. Remove the air duct and resonator assembly. Refer to EM-161, "Removal and Installation".
5. Disconnect the EVAP canister purge control solenoid valve harness connector.
6. Disconnect the fuel injector harness connectors.
7. Disconnect the fuel hose assembly from the fuel tubes (RH and LH).

Revision: July 2009 EM-176 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VK56DE]
CAUTION:
• While hoses are disconnected, plug them to prevent fuel from draining. A
• Do not separate the fuel connector and fuel hose.
8. Remove the fuel injectors with the fuel tube assembly.
9. Remove the fuel injector from the fuel tube. EM
a. Spread open to remove the clip.
b. Remove the fuel injector from the fuel tube by pulling straight
out. C
CAUTION:
• Be careful with remaining fuel that may leak out from fuel
tube. D
• Do not damage injector nozzles during removal.
• Do not bump or drop fuel injectors.
• Do not disassemble fuel injectors.
E

KBIA2506E

10. Remove the fuel damper from each fuel tube, if necessary. I

INSTALLATION
1. Install the fuel damper to each fuel tube, if removed. J
a. Apply engine oil to the new O-ring and set it into the cup of the
fuel tube.
CAUTION: K
• Handle O-ring with bare hands. Never wear gloves.
• Lubricate new O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of for- L
eign material.
• When installing O-ring, do not scratch it with tool or fin-
gernails. KBIA2473E M
• Do not twist or stretch the O-ring.
b. Make sure that the backup spacer is in the O-ring connecting surface of the fuel damper.
NOTE:
N
The backup spacer is part of the fuel damper assembly.
c. Insert the fuel damper until it seats on the fuel tube.
CAUTION:
• Insert straight, making sure that the axis is lined up. O
• Do not pressure-fit with excessive force.

Reference value :130 N (13.3 kg, 29.2 lb) P

d. Install the cap, and then tighten the bolts evenly.
• After tightening the bolts, make sure that there is no gap between the cap and fuel tube.
2. Install new O-rings to the fuel injector paying attention to the items below.
CAUTION:
• Do not reuse O-rings.
• Upper and lower O-rings are different colors.

Revision: July 2009 EM-177 2010 Pathfinder

 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VK56DE]

Fuel tube side : Blue

Nozzle side : Brown
• Handle O-ring with bare hands. Never wear gloves.
• Lubricate new O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of foreign material.
• When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring.
• If O-ring was stretched while it was being attached, do not insert it quickly into fuel tube.
• Insert O-ring straight into fuel tube. Do not angle or twist it.
3. Install the fuel injector to the fuel tube.
a. Insert new clip into clip mounting groove on the fuel injector.
• Insert clip so that lug ″A″ of fuel injector matches notch ″A″ of
the clip.
CAUTION:
• Do not reuse clip. Replace it with a new one.
• Do not allow the clip to interfere with the O-ring. If inter-
ference occurs, replace the O-ring.
b. Insert the fuel injector into the fuel tube with the clip attached.
• Insert it while matching it to the axial center.
• Insert fuel injector so that lug ″B″ of fuel tube matches notch
″B″ of the clip.
• Make sure that the fuel tube flange is securely seated in the
flange fixing groove on the clip.
c. Make sure that installation is complete by checking that the fuel
injector does not rotate or come off.
• Make sure that the protrusions of the fuel injectors are aligned
with the cutouts of the clips after installation.

KBIA2507E

4. Install the fuel tube and fuel injector assembly to the intake manifold.
CAUTION:
Do not let the tip of the injector nozzle come in contact with other parts.
• Tighten fuel tube assembly bolts ″a″ to ″b″ in illustration in two
steps.

1st step : 12.8 N·m (1.3 kg-m, 9 ft-lb)

2nd step : 24.5 N·m (2.5 kg-m, 18 ft-lb)

KBIA2474E

5. Install the fuel hose assembly.

• Insert connectors straight, making sure that the axis is lined up with fuel tube side to prevent O-ring from
being damaged.
• Tighten bolts evenly in several steps.
• Make sure that there is no gap between the flange and fuel tube after tightening the bolts.
CAUTION:
• Handle O-ring with bare hands. Do not wear gloves.
• Lubricate O-ring with new engine oil.
• Do not clean O-ring with solvent.
• Make sure that O-ring and its mating part are free of foreign material.
Revision: July 2009 EM-178 2010 Pathfinder
 FUEL INJECTOR AND FUEL TUBE
< ON-VEHICLE REPAIR > [VK56DE]
• When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to
twist or stretch O-ring. A
• If O-ring was stretched while it was being attached, do not insert it quickly into fuel tube.
• Insert new O-ring straight into fuel tube. Do not twist it.
6. Installation of the remaining components is in the reverse order of removal. EM
INSPECTION AFTER INSTALLATION
After installing the fuel tubes, make sure there are no fuel leaks at the connections using the following steps.
1. Apply fuel pressure to the fuel lines by turning ignition switch ON (with engine stopped). Then check for C
fuel leaks at the connections.
2. Start the engine and rev it up and check for fuel leaks at the connections.
WARNING: D
Do not touch the engine immediately after stopping, as engine becomes extremely hot.
NOTE:
Use mirrors for checking on hidden points. E

Revision: July 2009 EM-179 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
TIMING CHAIN
Exploded View INFOID:0000000005260520

AWBIA0818GB

Revision: July 2009 EM-180 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]

1. Camshaft sprocket LH bank EXH 2. Camshaft sprocket LH bank INT 3. Camshaft sprocket RH bank INT A
(VTC) (VTC)
4. Camshaft sprocket RH bank EXH 5. Front cover 6. Intake valve timing control solenoid
valve (RH)
EM
7. Intake valve timing control solenoid 8. Intake valve timing control position 9. Intake valve timing control position
valve cover (RH) sensor (RH) sensor (LH)
10. Intake valve timing control solenoid 11. Camshaft position sensor (PHASE) 12 Crankshaft pulley bolt
valve cover (LH) C
13. Crankshaft pulley 14. Chain tensioner cover 15. Front oil seal
16. Intake valve timing control solenoid 17. O-ring 18. Timing chain tension guide RH bank
valve (LH) D
19. Timing chain slack guide (RH) 20. Timing chain RH bank 21. Timing chain LH bank
22. Chain tensioner (RH) 23. Timing chain slack guide LH bank 24. Timing chain tension guide LH bank
25. Chain tensioner (LH) 26. O-ring 27. Bracket E
28. Oil pump drive spacer 29. Oil pump assembly 30. Crankshaft sprocket
A. To crankshaft B. To camshaft LH bank EXH C. To camshaft LH bank INT (VTC)
D. To camshaft RH bank INT (VTC) E. To camshaft RH bank EXH F. Apply sealant to mating side F
G. Refer to EM-181

Removal and Installation INFOID:0000000005260521

G
NOTE:
• To remove timing chain and associated parts, start with those on the LH bank. The procedure for removing
parts on the RH bank is omitted because it is the same as that for removal on the LH bank. H
• To install timing chain and associated parts, start with those on the RH bank. The procedure for installing
parts on the LH bank is omitted because it is the same as that for installation on the RH bank.
REMOVAL I
1. Remove the engine assembly from the vehicle. Refer to EM-214, "Removal and Installation".
2. Remove the following components and related parts:
J
• Drive belt auto tensioner and idler pulley. Refer to EM-150, "Drive Belt Auto Tensioner and Idler Pulley".
• Thermostat housing and water hose. Refer to CO-53, "Removal and Installation".
• Power steering oil pump bracket. Refer to ST-24, "Removal and Installation".
• Oil pan (lower), (upper) and oil strainer. Refer to EM-169, "Removal and Installation". K
• Rocker cover. Refer to EM-174, "Removal and Installation".
• Generator and generator bracket. Refer to CHG-21, "Removal and Installation".
• Water pump. Refer to CO-51, "Exploded View". L
3. Disconnect and remove the camshaft position sensor.
4. Disconnect and remove the intake valve timing control position sensor (RH and LH).
5. Disconnect and remove the intake valve timing control solenoid valve (RH and LH). M
6. Remove the Intake valve timing control solenoid valve cover
(RH) (A) and Intake valve timing control solenoid valve cover
(LH) (B) as follows: N
a. Loosen and remove the bolts in reverse order as shown.
b. Cut the liquid gasket and remove the covers using Tool.
O
Tool number : KV10111100 (J-37228)
CAUTION:
Do not damage mating surfaces. P
AWBIA0815ZZ

Revision: July 2009 EM-181 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
7. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica-
tion notch (without paint mark) with the timing indicator on the
front cover.

KBIA2476E

b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on LH bank) point outside.
• If they do not point outside, turn crankshaft pulley once more.

KBIA0400J

8. Remove the crankshaft pulley.

a. Loosen the crankshaft pulley bolts using a hammer handle to
secure the crankshaft.

PBIC0053E

b. Remove the crankshaft pulley from the crankshaft using tool.

• Remove the crankshaft pulley using suitable tool. Set the bolts
in the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front sur-
face.
NOTE:
The dimension between the centers of the two bolt holes is 61
mm (2.40 in).

KBIA2477E

9. Remove the front cover.

a. Loosen and remove the bolts in the reverse of order shown.
b. Cut the liquid gasket and remove the covers using Tool.

Tool number : KV10111100 (J-37228)

CAUTION:
Do not damage mating surfaces.
10. Remove the front oil seal using suitable tool.
CAUTION:
Do not damage front cover. KBIA2478E

Revision: July 2009 EM-182 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
11. Remove the oil pump drive spacer.
• Hold and remove the flat space of the oil pump drive spacer by A
pulling it forward.

EM

KBIA2512E
D
12. Remove the oil pump. Refer to LU-30, "Removal and Installation".
13. Remove the chain tensioner on the LH bank using the following steps.
NOTE: E
To remove the timing chain and associated parts, start with those on the LH bank. The procedure for
removing parts on the RH bank is omitted because it is the same as that for the LH bank.
a. Squeeze the return-proof clip ends using suitable tool and push F
the plunger into the tensioner body.
b. Secure the plunger using stopper pin.
• Stopper pin is made from hard wire approximately 1 mm (0.04 G
in) in diameter.
c. Remove the bolts and chain tensioner.
WARNING: H
Plunger, spring, and spring seat pop out when (squeezing)
return-proof clip without holding plunger head. It may
cause serious injuries. Always hold plunger head when
removing. KBIA2479E I

NOTE:
• Stop the plunger in the fully extended position by using the J
return-proof clip (1) if the stopper pin is removed.
• Push the plunger (2) into the tensioner body while squeezing
the return-proof clip (1). Secure it using stopper pin (3). K

KBIA2483E
M

14. Remove the timing chain tension guide and timing chain slack guide.
15. Remove the timing chain and crankshaft sprocket. N
16. Loosen the camshaft sprocket bolts as shown and remove the
camshaft sprocket.
• A: Camshaft holding location O
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft when timing chain is discon-
nected. P
17. Repeat the same procedure to remove the RH timing chain and
associated parts.

WBIA0799E

INSPECTION AFTER REMOVAL

Revision: July 2009 EM-183 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
Check for cracks and any excessive wear at link plates. Replace
chain if necessary.
• In the same way as for the LH bank, inspect the timing chain and
associated parts on the RH bank.

PBIC0282E

INSTALLATION

AWBIA0150ZZ

1. Camshaft sprocket RH bank INT 2. Camshaft sprocket RH bank EXH 3. Camshaft dowel pin RH bank
(VTC)
4. Timing chain RH bank 5. Timing chain slack guide RH bank 6. Chain tensioner (RH)
7. Crankshaft sprockets 8. Crankshaft key 9. Timing chain tension guide LH bank
10. Timing chain LH bank 11. Camshaft dowel pin LH bank 12. Camshaft sprocket LH bank EXH
13. Camshaft sprocket LH bank INT 14. Chain tensioner (LH) 15. Timing chain tension guide RH bank
(VTC)
16. Timing chain slack guide LH bank A. LH bank B. RH bank
C. Alignment mark (Link color: copper) D. Alignment mark (Link color: copper) E. Alignment mark (Identification mark)
F. Alignment mark for LH bank (Notch) G. Alignment mark for LH bank (Link H. Alignment mark for RH bank (Link
color: zinc yellow) color: zinc yellow)
J. Alignment mark (Link color: copper) K. Alignment mark (Identification mark) L. Alignment mark (Identification mark)
M Alignment mark (Link color: copper) N. Alignment mark (Identification mark)

NOTE:
• The above figure shows the relationship between the mating mark on each timing chain and that of the cor-
responding sprocket, with the components installed.
• To install the timing chain and associated parts, start with those on the RH bank. The procedure for installing
parts on the LH bank is omitted because it is the same as that for installation on the RH bank.

Revision: July 2009 EM-184 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]

1. Make sure the crankshaft key and RH bank camshaft dowel pin A
and LH bank camshaft dowel pin are facing in the direction
shown.

EM

SBIA0356E
D

2. Install the camshaft sprockets.

• Install the camshaft sprocket INT (VTC) (A) and camshaft E
sprockets EXH (B) by selectively using the groove of the
dowel pin according to the bank. (Common part used for both
exhaust banks.)
NOTE: F
Use the groove marked (R) for RH bank and (L) for LH bank.
• Lock the hexagonal part of the camshaft in the same way as
for removal, and tighten the bolts. G

AWBIA0151ZZ

H
3. Install the crankshaft sprockets for both banks.
• Install LH bank crankshaft sprocket (B) and RH bank crank-
shaft sprocket (C) so that their flange side (A) (the larger diam- I
eter side without teeth) faces in the direction shown.
NOTE:
The same parts are used but facing directions are different.
J

K
WBIA0701E

4. Install the timing chains and associated parts. L

• Align the alignment mark on each sprocket and the timing chain for installation.
CAUTION:
• Before installing chain tensioner, it is possible to change the position of alignment mark on
timing chain and each sprocket. After the alignment marks are aligned, keep them aligned by M
holding them by hand.
• Install the slack guides and tension guides onto the correct side by checking the identification mark on
the surface. N
• Install the chain tensioner with the plunger locked in with the stopper pin.
CAUTION:
• Before and after the installation of the chain tensioner, make sure that the alignment mark on
the timing chain is not out of alignment. O
• After installing the chain tensioner, remove the stopper pin to release the chain tensioner.
Make sure the chain tensioner is released.
• To avoid chain-link skipping of the timing chain, do not move crankshaft or camshafts until the P
front cover is installed.
5. In the same way as for the RH bank, install the timing chain and associated parts on the LH bank.
6. Install the oil pump.

Revision: July 2009 EM-185 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
7. Install the oil pump drive spacer as follows:
• Install so that the front mark on the front edge of the oil pump
drive spacer faces the front of the engine.
• Insert the oil pump drive spacer according to the directions of
the crankshaft key and the two flat surfaces of the oil pump
inner rotor.
• If the positional relationship does not allow the insertion, rotate
the oil pump inner rotor to allow the oil pump drive spacer to
be inserted.

KBIA2490E

8. Install the front oil seal using suitable tool.

CAUTION:
Do not scratch or make burrs on the circumference of the
oil seal.

PBIC0059E

9. Install the chain tensioner cover.

• Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

KBIA2547E

10. Install the front cover as follows:

a. Install a new O-ring on the cylinder block.

KBIA2516E

Revision: July 2009 EM-186 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
b. Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to A
GI-14, "Recommended Chemical Products and Sealants".
c. Check again that the timing alignment marks on the timing chain
and on each sprocket are aligned. Then install the front cover. EM

KBIA2517E

D
d. Install the bolts in the numerical order shown.

M6 × 50 mm (1.97 in) : No. 1, 20, 25, 26, 27 E

M6 × 80 mm (3.15 in) : No. 4, 5, 7
M6 × 20 mm (0.79 in) : Except the above
e. After tightening, re-tighten to the specified torque. F
CAUTION:
Be sure to wipe off any excessive liquid gasket leaking onto
surface mating with oil pan. G

KBIA2478E

H
11. Install the Intake valve timing control solenoid valve cover (RH)
(A) and Intake valve timing control solenoid valve cover (LH) (B)
as follows:
• Cross mark that can not be seen after assembly (C) I

D : 2.6 - 3.6 mm (0.102 - 0.142 in) dia.

J
a. Apply liquid gasket (D) as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
CAUTION: K
The start and end of the application of the liquid gasket WBIA0800E

should be crossed at a position (C) that cannot be seen

after attaching the intake valve timing control solenoid valve cover. L
b. Install the bolts and tighten them to specification in the numeri-
cal order shown.
• A: Intake valve timing control solenoid valve cover (RH)
• B: Intake valve timing control solenoid valve cover (LH) M

O
AWBIA0815ZZ

12. Install the crankshaft pulley.

• Install the key of the crankshaft. P
• Insert the pulley by lightly tapping it.
CAUTION:
Do not tap pulley on the side surface where the belt is installed (outer circumference).
13. Tighten the crankshaft pulley bolt.
• Lock the crankshaft using suitable tool, then tighten the bolt.
• Perform the following steps for angular tightening:

Revision: July 2009 EM-187 2010 Pathfinder

 TIMING CHAIN
< ON-VEHICLE REPAIR > [VK56DE]
a. Apply engine oil onto the threaded parts of the bolt and seating area.
b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a alignment mark
(such as paint) on the crankshaft pulley.

Crankshaft pulley bolt torque

Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90° (angle tightening)
14. Rotate the crankshaft pulley in normal direction (clockwise when
viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse order KBIA2519E

of removal.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:

Item Before starting engine Engine running After engine stopped

Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Revision: July 2009 EM-188 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
CAMSHAFT
A
Exploded View INFOID:0000000005260522

EM

AWBIA0819GB

1. Cylinder head RH bank 2. Camshaft bracket (No. 2, 3, 4, 5) 3. Valve lifter K

4. Camshaft bracket (No. 1) 5. Seal washer 6. Camshaft RH bank EXH
7. Camshaft RH bank INT 8. Camshaft LH bank INT 9. Camshaft LH bank EXH
L
10. Camshaft sprocket RH bank EXH 11. Camshaft sprocket RH bank INT 12. Camshaft sprocket LH bank INT
(VTC) (VTC)
13. Camshaft sprocket LH bank EXH 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head LH bank A. Refer to EM-189 M

Removal and Installation INFOID:0000000005260523

N
NOTE:
Do not remove the engine assembly to perform this procedure.
REMOVAL O
1. Remove the engine under cover. Refer to EXT-14, "Removal and Installation".
2. Remove the RH bank and LH bank rocker covers. Refer to EM-174, "Removal and Installation".
3. Remove the spark plugs. Refer to EM-152, "Removal and Installation". P
4. Remove the drive belt. Refer to EM-149, "Removal and Installation".

Revision: July 2009 EM-189 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
5. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identifica-
tion notch (without paint mark) with the timing indicator on the
front cover.

KBIA2476E

b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on LH bank) point outside.
• If they do not point outside, turn crankshaft pulley once more.

KBIA0400J

6. Disconnect and remove the camshaft position sensor. Refer to EM-189, "Exploded View".
7. Disconnect and remove the intake valve timing control position sensor (RH and LH). Refer to EM-180,
"Exploded View".
8. Disconnect and remove the intake valve timing control solenoid valve (RH and LH). Refer to EM-180,
"Exploded View".
9. Remove the intake valve timing control solenoid valve cover
(RH) (A) and intake valve timing control solenoid valve cover
(LH) (B) as follows:
a. Loosen and remove the bolts in reverse order as shown.
b. Cut the liquid gasket and remove the covers using Tool.

Tool number : KV10111100 (J-37228)

CAUTION:
Do not damage mating surfaces.
AWBIA0815ZZ

10. Paint alignment marks on the RH bank (A) timing chain links (C)
and LH bank (B) timing chain links (D) and align with the cam-
shaft sprocket alignment marks (E) and (F).

AWBIA0154ZZ

11. Remove the chain tensioner (LH) using the following steps.
WARNING:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.

Revision: July 2009 EM-190 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the chain tensioner body. A
b. Secure plunger using stopper pin.
• Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter. EM
c. Remove the bolts and the timing chain tensioner.

KBIA2479E

D
NOTE:
• Stop plunger in the fully extended position using return-proof clip
(1) if stopper pin is removed.
E
• Push the plunger (2) into the chain tensioner body while squeezing
the return-proof clip (1). Secure it using stopper pin (3).

KBIA2483E

H
12. Remove the chain tensioner cover from the front cover using
Tool.
I
Tool number : KV10111100 (J-37228)
CAUTION:
Do not damage mating surfaces. J

K
KBIA2521E

13. Remove the chain tensioner (RH) using the following steps. L
WARNING:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
M
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the chain tensioner body.
b. Secure plunger using stopper pin.
• Stopper pin is made from hard wire approximately 1 mm (0.04 N
in) in diameter.

P
KBIA2479E

Revision: July 2009 EM-191 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
c. Remove the bolts and the chain tensioner (RH) (A).
NOTE:
If it is difficult to push plunger on chain tensioner (RH) (A),
remove the plunger under extended condition.

WBIA0705E

14. Loosen camshaft sprocket bolts as shown and remove camshaft

sprockets.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain discon-
nected.

KBIA2485E

15. Remove the RH (A) front cover bolts and LH (B) front cover
bolts.

WBIA0706E

16. Remove RH (A) camshaft bracket bolts and LH (C) camshaft

bracket bolts in the reverse of order shown to remove camshaft
brackets.
• Remove No. 1 camshaft bracket.
NOTE:
The bottom and front surface of bracket will be stuck because
of liquid gasket.
• : Engine front
• B: Exhaust side
• D: Intake side

WBIA0707E

Revision: July 2009 EM-192 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
17. Remove the camshaft.
18. Remove the valve lifters if necessary. A
• Correctly identify location where each part is removed from. Keep parts organized to avoid mixing them
up.
INSPECTION AFTER REMOVAL EM

Camshaft Runout
1. Put V block on precise flat work bench, and support No. 1 and C
No. 5 journals of the camshaft.
2. Set dial indicator vertically to No. 3 journal.
3. Turn the camshaft to one direction, and measure the camshaft D
runout on dial indicator (total indicator reading).

Camshaft runout : Less than 0.02 mm (0.0008 in) E

• If measurement exceeds specification, replace the camshaft.

EMK0641D F
Camshaft Cam Height
• Measure the camshaft cam height.
G
Standard cam height : 44.865 - 45.055 mm
(intake) (1.7663 - 1.7738 in)
Standard cam height (ex- : 45.075 - 45.265 mm H
haust) (1.7746 - 1.7821 in)
Cam wear limit : 0.02 mm (0.0008 in)
(intake & exhaust) I
• If measurement is not within the specifications, replace the cam-
shaft. PBIC0039E

J
Camshaft Journal Clearance

Camshaft Journal Diameter

• Measure the diameter of the camshaft journal. K

Standard diameter : 25.950 - 25.970 mm

(1.0217 - 1.0224 in) L

PBIC0040E N

Camshaft Bracket Inner Diameter

• Tighten the camshaft bracket bolt to the specified torque. O
• Measure the inner diameter (A) of the camshaft bracket.

Standard : 26.000 - 26.021 mm (1.0236 - 1.0244 in)

P
Calculation of Camshaft Journal Clearance
(Journal clearance) = (camshaft bracket inner diameter) – (camshaft
journal diameter)

Standard : 0.030 - 0.071 mm (0.0012 - 0.0028 in)

• If measurement is not within specification, replace either or both PBIC1645E
camshaft and cylinder head.

Revision: July 2009 EM-193 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
NOTE:
The inner diameter of the camshaft bracket is manufactured together with the cylinder head. Replace the
whole cylinder head as an assembly.
Camshaft End Play
• Install dial gauge in the thrust direction on the front end of the cam-
shaft. Measure the end play when the camshaft is moved forward/
backward (in direction to axis).

Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in)

• If measurement is out of the specified range, replace the camshaft
and measure again.
• If measurement is still out of the specified range, replace the cylin-
der head.

PBIC0042E

• Measure the following parts if end play is outside the specified

value.
- Dimension ″A″ for camshaft No. 1 journal

Standard : 30.500 - 30.548 mm (1.2008-1.2027 in)

- Dimension ″B″ for cylinder head No. 1 journal

Standard : 30.360 - 30.385 mm (1.1953-1.1963 in)

• If measurements are not within specification, replace the camshaft
and/or cylinder head. KBIA2426J

Camshaft Sprocket Runout

1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.

Runout : Less than 0.15 mm (0.0059 in)

• If measurement exceeds the specification, replace the cam-
shaft sprocket.

KBIA0181J

Valve Lifter
Check if the surface of the valve lifter has any wear or cracks.
• If any damage is found, replace the valve lifter.
• Select the thickness of the head so that the valve clearance is
within the standard when replacing. Refer to EM-198, "Inspection
after Installation".

KBIA0182E

Valve Lifter Clearance

Valve Lifter Diameter

Revision: July 2009 EM-194 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
• Measure the diameter of the valve lifter.
A
Standard : 33.977 - 33.987 mm (1.3377 - 1.3381 in)

EM

JEM798G

D
Valve Lifter Hole Diameter
• Measure the diameter of the valve lifter hole of the cylinder head,
using suitable tool. E

Standard : 34.000 - 34.016 mm (1.3386 - 1.3392 in)

Calculation of Valve Lifter Clearance F
(Valve lifter clearance) = (valve lifter hole diameter) – (valve lifter
diameter)
G
Standard : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
• If the measurement is not within specification, referring to each PBIC0043E
specification of the valve lifter diameter and hole diameter, replace H
either or both the valve lifter and cylinder head.
INSTALLATION
1. Install the valve lifters if removed. I
• Install removed parts in their original locations.
2. Install the camshafts. Use the table below for identification of the
RH and LH, and intake and exhaust. J

Identification Identification Identification

Bank INT EXH
paint (front) paint (rear) rib
K
INT Pink — Yes
RH
EXH — Orange Yes
INT Pink — No L
LH
EXH — Orange No
KBIA2523E

• Install so that the RH bank (B) dowel pins (A) and LH bank (C)
dowel pins (A) at the front of the camshaft face are in the N
direction shown.

WBIA0708E

Revision: July 2009 EM-195 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
3. Install the RH bank (B) and LH bank (D) camshaft brackets (A).
• Install by referring to the installation location mark (E) on the
upper surface.
• Install so that the installation location mark (E) can be correctly
read when viewed from the intake manifold side (C).
• : Front

AWBIA0164ZZ

• Install No. 1 camshaft bracket using the following procedure:

• C:11 mm (0.43 in)
• D: 2.0 - 3.0 mm (0.079 - 0.118 in) dia.
- Apply liquid gasket to No. 1 camshaft bracket (A) and (B) as
shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
CAUTION:
• After installation, be sure to wipe off any excessive liq-
uid gasket outside of application (C) and (D) both on RH
and LH sides.
WBIA0710E
• Remove completely any excess of liquid gasket inside
bracket.

- Apply liquid gasket (C) to the back side of the LH (A) bank
front cover and RH (B) bank front cover as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
- C: 2.6 - 3.6 mm (0.102 - 0.142 in) dia.

WBIA0711E

Revision: July 2009 EM-196 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
- Position No. 1 camshaft bracket close to the mounting posi-
tion, and then install it to prevent from touching liquid gasket A
applied to each surface.

EM

SBIA0259E

D
- Temporarily tighten the RH (A) and LH (B) front cover bolts (4
for each bank) as shown.
E

G
WBIA0706E

4. Tighten the camshaft bracket bolts as follows: H

Camshaft bracket bolts

Step 1 (bolts 9 - 12) : 1.96 N·m (0.2 kg-m, 17 in-lb) I
Step 2 (bolts 1 - 8) : 1.96 N·m (0.2 kg-m, 17 in-lb)
Step 3 (all bolts) : 5.88 N·m (0.6 kg-m, 52 in-lb)
J
Step 4 (all bolts) : 10.4 N·m (1.1 kg-m, 92 in-lb)
CAUTION:
After tightening the camshaft bracket bolts, be sure to wipe K
off excessive liquid gasket from the parts listed below.
• Mating surface of rocker cover
• Mating surface of front cover
• A: RH bank L
• B: Exhaust side
• C: LH bank
• D: Intake side M
• : Front

WBIA0707E

O
a. Tighten the RH (A) and LH (B) front cover bolts (4 for each bank)
as shown to the specified torque.

P
Front cover bolts : 11.0 N·m (1.1 kg-m, 8 ft-lb)

WBIA0706E

Revision: July 2009 EM-197 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]

5. Install the camshaft sprockets using the following procedure:

• A: LH bank shown
a. Install the camshaft sprockets aligning them with the matching
marks painted on the timing chain (B) and the camshaft sprock-
ets (C) before removal. Align the camshaft sprocket key groove
with the dowel pin on the camshaft front edge at the same time.
Then temporarily tighten camshaft sprocket bolts.

AWBIA0152ZZ

• Install the intake VTC (A) and exhaust (B) side camshaft
sprockets by selectively using the groove of the dowel pin
according to the bank for the exhaust (B) side camshaft
sprockets. (Common part used for both exhaust banks.)
NOTE:
Use the groove marked (R) for RH bank and (L) for LH bank.
b. Lock the hexagonal part of the camshaft in the same way as for
removal, and tighten the camshaft sprocket bolts.
c. Check again that the timing alignment mark on the timing chain
and on each sprocket are aligned.
AWBIA0151ZZ

6. Install the chain tensioner using the following procedure:

NOTE:
LH is shown.
a. Install the chain tensioner.
• Compress the plunger and hold it using a stopper pin when
installing.
• Loosen the slack guide side timing chain by rotating the cam-
shaft hexagonal part if mounting space is small.

Chain tensioner bolts : 6.9 N·m (0.70 kg-m, 61 in-lb)

KBIA2479E
b. Remove the stopper pin and release the plunger to apply ten-
sion to the timing chain.
c. Install the chain tensioner cover onto the front cover.
• Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".

Chain tensioner cover : 9.0 N·m (0.92 kg-m, 80 in-lb)

bolts
7. Check and adjust valve clearances. Refer to EM-198, "Inspec-
tion after Installation".
8. Installation of the remaining components is in the reverse order KBIA2547E
of removal.
Inspection after Installation INFOID:0000000005260524

INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE

WARNING:
Check when engine is cold so as to prevent burns from any splashing engine oil.
CAUTION:

Revision: July 2009 EM-198 2010 Pathfinder

 CAMSHAFT
< ON-VEHICLE REPAIR > [VK56DE]
• Perform this inspection only when DTC P0011 is detected in self-diagnostic results of CONSULT III
and it is directed according to inspection procedure of EC section. Refer to EC-585, "Component A
Inspection".
1. Check engine oil level. Refer to LU-24, "Inspection".
2. Perform the following procedure so as to prevent the engine from being unintentionally started while EM
checking.
a. Release fuel pressure. Refer to EC-958, "Fuel Pressure Check".
b. Disconnect ignition coil and injector harness connectors if practical. C
3. Remove IVT control solenoid valve.
4. Crank engine, and then make sure that engine oil comes out from IVT control cover oil hole. End cranking
after checking. D
WARNING:
Be careful not to touch rotating parts (drive belts, idler pulley, and crankshaft pulley, etc.).
CAUTION: E
• Engine oil may squirt from IVT control solenoid valve installation hole during cranking. Use a
shop cloth to prevent engine oil from splashing on worker, engine components and vehicle.
• Do not allow engine oil to get on rubber components such as drive belts or engine mount insula-
tors. Immediately wipe off any splashed engine oil. F
5. Clean oil groove between oil strainer and IVT control solenoid valve if engine oil does not come out from
IVT control valve cover oil hole. Refer to LU-23, "System Chart".
G
6. Remove components between IVT control solenoid valve and camshaft sprocket (INT), and then check
each oil groove for clogging.
• Clean oil groove if necessary.
7. After inspection, installation of the remaining components is in the reverse order of removal. H

Revision: July 2009 EM-199 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VK56DE]
OIL SEAL
Removal and Installation of Valve Oil Seal INFOID:0000000005260525

REMOVAL
1. Remove the camshaft relating to the valve oil seal to be removed. Refer to EM-189, "Removal and Instal-
lation".
2. Remove the valve lifters. Refer to EM-206, "Exploded View".
• Correctly identify the location where each part is removed from. Keep parts organized to avoid mixing
them up.
3. Turn the crankshaft until the cylinder requiring new oil seals is at TDC. This will prevent the valve from
dropping into the cylinder.
4. Remove the valve collet using Tool.

Tool number : KV10116200 (J-26336-B)

: KV10115900 (J-26336-20)
: KV10109220 ( — )
CAUTION:
Do not damage the valve lifter holes.
5. Remove the valve spring retainer and valve spring.
CAUTION:
Do not remove the valve spring seat from the valve spring. WBIA0578E

6. Remove the valve oil seal using Tool.

Tool number : KV10107902 (J-38959)

WBIA0478E

INSTALLATION
Installation is in the reverse order of removal.
• Install the valve oil seal using Tool.

Tool number : KV10115600 (J-38958)

• Apply new engine oil on the new valve oil seal joint and seal lip.
• Install the valve oil seal to the specified height "H".

Height "H" (without valve spring installed)

Intake and exhaust : 14.300 - 14.900 mm (0.5630 -
0.5870 in)
WBIA0490E

Removal and Installation of Front Oil Seal INFOID:0000000005260526

REMOVAL
1. Remove the drive belt. Refer to EM-149, "Removal and Installation".
2. Remove the radiator assembly. Refer to CO-44, "Removal and Installation".
3. Remove the cooling fan (crankshaft driven type). Refer to CO-48, "Removal and Installation (Crankshaft
Driven Type)".

Revision: July 2009 EM-200 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VK56DE]
4. Remove drive plate cover.
5. Lock crankshaft using Tool (A). A

Tool number : — (J-47245)

EM

LBIA0455E
D

6. Match mark crankshaft pulley bolt flange and crankshaft pulley for installation.
7. Remove the crankshaft pulley. E
a. Remove the crankshaft pulley from the crankshaft using suitable
tool.
• Set the bolts in the two bolt holes [M6 x 1.0 mm (0.04 in)] on
F
the front surface.
NOTE:
The dimension between the centers of the two bolt holes is 61
mm (2.40 in). G

H
KBIA2477E

8. Remove the front oil seal using suitable tool. I

CAUTION:
Do not damage front cover and oil pump drive spacer.

SBIA0359E
L
INSTALLATION
1. Apply new engine oil to both the oil seal lip and dust seal lip of the new front oil seal.
2. Install the front oil seal. M
• Install the front oil seal so that each seal lip is oriented as
shown.
N

P
SEM715A

Revision: July 2009 EM-201 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VK56DE]
• Press-fit until the front oil seal is level with the front cover
using suitable tool.
CAUTION:
• Do not damage front timing chain case and crankshaft.
• Press-fit straight and avoid causing burrs or tilting of the
oil seal.

SBIA0359E

3. Tighten the crankshaft pulley bolt.

• Perform the following steps for angular tightening:
a. Apply engine oil onto the threaded parts of the bolt and seating area.
b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a alignment mark
(such as paint) on the crankshaft pulley.

Crankshaft pulley bolt torque

Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90° (angle tightening)

KBIA2519E

4. Remove Tool (A).

Tool number : — (J-47245)

LBIA0455E

5. Installation of the remaining components is in the reverse order of removal.

Removal and Installation of Rear Oil Seal INFOID:0000000005260527

REMOVAL
1. Remove the transmission assembly. Refer to TM-195, "4WD : Removal and Installation".
2. Before removing the drive plate, put a match mark (A) on the
crankshaft and drive plate for alignment during installation.

ALBIA0522ZZ

3. Remove the drive plate.

Revision: July 2009 EM-202 2010 Pathfinder

 OIL SEAL
< ON-VEHICLE REPAIR > [VK56DE]
• Holding the crankshaft pulley bolt, lock the crankshaft to
remove the drive plate bolts. A
• Remove drive plate bolts diagonally.
CAUTION:
• Do not damage the drive plate. Especially, avoid deform-
EM
ing and damaging the signal plate teeth (circumference
position).
• Keep magnetic materials away from signal plate.
• Place the drive plate with the signal plate surface facing C
upward.
KBIA2491E

D
4. Remove the rear oil seal using suitable tool.
CAUTION:
Do not damage crankshaft or oil seal retainer surface.
E

G
WBIA0437E

INSTALLATION
H
1. Apply new engine oil to both the oil seal lip and dust seal lip of the new rear oil seal.
2. Install the rear oil seal.
• Install the rear oil seal so that each seal lip is oriented as
shown. I

SEM715A
L

• Press-fit the rear oil seal using suitable tool.

CAUTION:
• Do not damage the crankshaft or oil seal retainer. M
• Press-fit the oil seal straight to avoid causing burrs or
tilting.
• Do not touch grease applied onto the oil seal lip. N
• Do not damage or scratch the outer circumference of
the rear oil seal.
• Tap until flush with the front edge of the oil seal retainer.
O

WBIA0438E

3. Installation of the remaining components is in the reverse order of removal. Refer to EM-218, "Exploded P
View", TM-195, "4WD : Removal and Installation".
CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed cor-
rectly during re-assembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of
drivetrain components.

Revision: July 2009 EM-203 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
CYLINDER HEAD
Exploded View INFOID:0000000005260528

KBIA2528E

1. Harness bracket 2. Engine coolant temperature sensor 3. Washer

4. Cylinder head gasket (LH) 5. Cylinder head (RH) 6. Cylinder head bolt
7. Cylinder head gasket (RH) 8. Cylinder head (LH)

Removal and Installation INFOID:0000000005260529

REMOVAL
1. Remove the crankshaft pulley, front cover, oil pump, and timing chain. Refer to EM-181, "Removal and
Installation".
2. Remove the following components and related parts:
• Fuel tube and fuel injector assembly. Refer to EM-176, "Removal and Installation".
• Intake manifold. Refer to EM-162, "Removal and Installation".
• Starter. Refer to STR-24, "Removal and Installation".
• Knock sensors. Refer to EM-218, "Exploded View".
3. Remove the camshaft sprockets and camshafts. Refer to EM-189, "Removal and Installation".
4. Remove the cylinder head bolts in reverse of order shown.
5. Remove the cylinder heads.

PBIC0068E

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Diameter

Revision: July 2009 EM-204 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
• Cylinder head bolts are tightened by plastic zone tightening
method. Whenever the size difference between (d1) and (d2) A
exceeds the limit, replace the bolt with a new one.

Limit (d1 - d2) : 0.23 mm (0.0091 in) EM

• If reduction of diameter appears in a position other than (d2), use it
as (d2) point.
C

KBIA0189E

D
INSTALLATION
1. Install a new cylinder head gasket.
2. Install the cylinder head. Follow the steps below to tighten the E
bolts in the numerical order shown.
CAUTION:
• If cylinder head bolts are re-used, check their diameters
before installation. Follow the "Cylinder Head Bolts Diam- F
eter" procedure.
a. Apply engine oil to threads and seating surface of the bolts.
G

PBIC0068E H

b. Measure the tightening angle using Tool.

CAUTION:
Measure the tightening angle using Tool. Do not measure I
visually.

Step a : 44.1 N·m (4.5 kg-m, 33 ft-lb) J

Step b : 70° clockwise
Step c : Loosen in the reverse order of tightening
K
Step d : 44.1 N·m (4.5 kg-m, 33 ft-lb)
Step e : 60° clockwise WBIA0603E

Step f : 60° clockwise L

Tool number : KV10112100 (BT-8653-A)

M
3. Installation of the remaining components is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are N
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
O
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE: P
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.

Revision: July 2009 EM-205 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:

Item Before starting engine Engine running After engine stopped

Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Exploded View INFOID:0000000005260530

WBIA0470E

1. Spark plug 2. Valve lifter 3. Valve collet

4. Valve spring retainer 5. Valve spring 6. Valve spring seat
7. Valve oil seal 8. Valve guide 9. Valve seat
10. Valve (INT) 11. Valve (EXH) 12. Cylinder head (LH bank)
13. Spark plug tube 14. Cylinder head (RH bank)

Disassembly and Assembly INFOID:0000000005260531

DISASSEMBLY
1. Remove the spark plug. Refer to EM-152, "Removal and Installation".
2. Remove the valve lifter.
• Identify the installation positions, and store them without mixing them up.

Revision: July 2009 EM-206 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
3. Remove the valve collet using Tool.
A
Tool number : KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
: KV10109220 ( — ) EM

CAUTION:
When working, take care not to damage valve lifter holes.
C
4. Remove the valve spring retainer, valve spring and valve spring
seat.
5. Inspect the valve guide clearance. Refer to EM-208, "Inspection WBIA0578E

After Disassembly". D
6. Push the valve stem to the combustion chamber side, and remove the valve.
• Identify the installation positions, and store them without mixing them up.
E
7. Remove the valve oil seal using Tool.

Tool number : KV10107902 (J-38959)

F

H
WBIA0478E

8. Replace the valve seat if necessary. Refer to EM-208, "Inspection After Disassembly".
9. Replace the valve guide if necessary. Refer to EM-208, "Inspection After Disassembly". I
10. Remove the spark plug tube, if necessary.
• Remove the spark plug tube out of the cylinder head using suitable tool.
CAUTION: J
• Do not damage the cylinder head.
• Do not remove the spark plug tube unless absolutely necessary. Once removed, the spark plug
tube will be deformed and cannot be reused.
K
ASSEMBLY
1. Install the valve guide if necessary. Refer to EM-208, "Inspection After Disassembly".
2. Install the valve seat if necessary. Refer to EM-208, "Inspection After Disassembly". L
3. Install the valve oil seal using Tool.

Tool number : KV10115600 (J-38958) M

• Apply new engine oil on the new valve oil seal joint and seal
lip.
• Install the valve oil seal to the specified height "H". N

Height "H" (without valve spring installed)

Intake and exhaust : 14.300 - 14.900 mm (0.5630 - O
0.5870 in) WBIA0490E

4. Install the valves in their original position. P

5. Install the valve spring seats.

Revision: July 2009 EM-207 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
6. Install the valve springs.
• Install the narrow pitch end (paint mark side) to the cylinder
head side.
7. Install the valve spring retainers.

SEM085D

8. Install the valve collet using Tool.

Tool number : KV10116200 (J-26336-B)

: KV10115900 (J-26336-20)
: KV10109220 ( — )
CAUTION:
When working, take care not to damage valve lifter holes.

WBIA0578E

9. Install the valve lifters.

• Install the removed parts in their original locations.
• If installing new lifters, select the correct size lifter for proper valve clearance. Refer to EM-208, "Inspec-
tion After Disassembly".
10. Install the spark plug tube if necessary, following the procedure below.
a. Remove any old liquid gasket adhering to the cylinder head spark plug tube hole.
b. Apply liquid gasket to area within approximately 12 mm (0.47 in) from the edge of the spark plug tube
press-fit side.
Use Genuine RTV Silicone Sealant or equivalent. Refer to GI-14, "Recommended Chemical Prod-
ucts and Sealants".
c. Press-fit the spark plug tube to the specified height “H” using
suitable tool.

Standard press-fit height “H” :38.400 - 39.400 mm

(1.512 - 1.551 in)
CAUTION:
• When press-fitting, take care not to deform the spark plug
tube.
• After press-fitting, wipe off any liquid gasket protruding
onto the cylinder-head upper face.
KBIA1248E
11. Install the spark plugs.

Inspection After Disassembly INFOID:0000000005260532

CYLINDER HEAD DISTORTION

1. Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface.
CAUTION:
Do not allow any debris to enter the oil or coolant passages.

Revision: July 2009 EM-208 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
2. Measure the bottom surface of the cylinder head for distortion in
six directions as shown, using suitable tools. A

Standard : 0.03 mm (0.0012 in)

Limit : 0.1 mm (0.004 in) EM
• If measurement exceeds the limit, replace the cylinder head.

PBIC0075E

D
VALVE DIMENSIONS
• Check the dimensions of each valve. Refer to EM-244, "Standard
and Limit".
• If the dimensions are out of the standard, replace the valve. E

SEM188A

VALVE GUIDE CLEARANCE H

Valve Stem Diameter
Measure the diameter of the valve stem using suitable tool.
I
Standard
Intake : 5.965 - 5.980 mm (0.2348 - 0.2354 in)
J
Exhaust : 5.955 - 5.970 mm (0.2344 - 0.2350 in)

SEM938C
L
Valve Guide Inside Diameter
Measure the inside diameter of the valve guide using suitable tool.
M
Standard
Intake and Exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in)
Valve Guide Clearance N
• (Valve guide clearance) = (Valve guide inside diameter) – (Valve stem diameter).

Valve guide clearance: O

Standard
Intake : 0.020 - 0.053 mm (0.0008 - 0.0021 in)
P
Exhaust : 0.030 - 0.063 mm (0.0012 - 0.0025 in)
Limit
Intake : 0.08 mm (0.0031 in)
Exhaust : 0.09 mm (0.0035 in)
• If the calculated value exceeds the limit, replace valve and/or valve guide. When the valve guide must be
replaced, follow the valve guide replacement procedure.

Revision: July 2009 EM-209 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
VALVE GUIDE REPLACEMENT
When the valve guide is removed, replace it with an oversized (0.2 mm, 0.008 in) valve guide.
1. To remove the valve guide, heat the cylinder head to 110° to
130°C (230° to 266°F) by soaking it in heated oil.

SEM008A

2. Remove the valve guide using suitable tool.

WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned.

SEM931C

3. Ream the cylinder head valve guide hole using suitable tool.

Valve guide hole diameter:

Standard
Intake and exhaust : 9.975 - 9.996 mm (0.3927 -
0.3935 in)
Oversize (service)
Intake and exhaust : 10.175 - 10.196 mm (0.4006
- 0.4014 in)
SEM932C

4. Heat the cylinder head to 110° to 130°C (230° to 266°F) by

soaking it in heated oil.

SEM008A

Revision: July 2009 EM-210 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
5. Press the valve guide from the camshaft side to the dimensions
as shown. A
WARNING:
Cylinder head contains heat. When working, wear protec-
tive equipment to avoid getting burned. EM

KBIA2530E

D
6. Ream the cylinder head valve guide using suitable tool.

Valve guide hole diameter: E

Intake and exhaust : 6.000 - 6.018 mm (0.2362
- 0.2369 in)
F

G
SEM932C

VALVE SEAT CONTACT H

• After confirming that the dimensions of the valve guides and valves
are within specifications, perform this procedure.
• Apply prussian blue (or white lead) onto the contacting surface of
the valve seat to check the condition of the valve contact on the I
surface.
• Check if the contact area band is continuous all around the circum-
ference. J
• If not, grind to adjust the valve fit and check again. If the contacting
surface still has NG conditions even after the re-check, replace the
valve seat.
K
SBIA0322E

VALVE SEAT REPLACEMENT L

When the valve seat is removed, replace it with oversized (0.5 mm, 0.020 in) valve seat.
1. Bore out the old seat until it collapses. Boring should not continue beyond the bottom face of the seat
recess in the cylinder head. Set the machine depth stop to ensure this. M
2. Ream the cylinder head recess diameter for service valve seat.

Oversize [0.5 mm (0.020 in)] (Service): N

Intake : 38.500 - 38.516 mm (1.5157 - 1.5164 in)
Exhaust : 32.700 - 32.716 mm (1.2874 - 1.2880 in)
O
• Be sure to ream in circles concentric to the valve guide center.
• This will enable valve seat to fit correctly.

P
SEM795A

Revision: July 2009 EM-211 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
3. Heat the cylinder head to 110° to 130°C (230° to 266°F) by
soaking it in heated oil.

SEM008A

4. Cool the valve seats well with dry ice. Force fit the valve seat into the cylinder head.
WARNING:
• Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
CAUTION:
• Avoid directly touching cold valve seats.
5. Finish the seat to the specified dimensions using suitable tool.
Refer to EM-244, "Standard and Limit".
CAUTION:
When using valve seat cutter, firmly grip the cutter handle
with both hands. Then, press on the contacting surface all
around the circumference to cut in a single drive. Improper
pressure on the cutter or cutting many different times may
result in stage valve seat.

SEM934C

6. Grind to obtain the dimensions indicated as shown.

• Using compound, grind to adjust valve fitting.

KBIA2531E

KBIA2544E

7. Check again for normal contact.

VALVE SPRING SQUARENESS

Revision: July 2009 EM-212 2010 Pathfinder

 CYLINDER HEAD
< ON-VEHICLE REPAIR > [VK56DE]
• Set try square along the side of valve spring and rotate the spring.
Measure the maximum clearance between the top face of spring A
and try square.

Limit : Less than 2.2 mm (0.087 in) EM

• If measurement is not within specifications, replace the valve
spring.
C

PBIC0080E

D
VALVE SPRING DIMENSIONS AND VALVE SPRING PRESSURE LOAD
• Check the valve spring pressure at the specified spring height.

Standard: E
Intake and exhaust
Free height: 50.58 mm (1.9913 in) F
Installation height: 37.0 mm (1.457 in)
Installation pressure: 165.8 - 187.0 N (16.9 -
19.1 kg, 37- 42 lb) G
Height during valve open: 28.2 mm (1.110 in)
SEM113
Load with valve open: 314.8 - 355.0 N (32.1 -
36.2 kg, 71 - 80 lb) H

• If measurement is not within specifications, replace the valve spring.

I

Revision: July 2009 EM-213 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VK56DE]

REMOVAL AND INSTALLATION

ENGINE ASSEMBLY
Exploded View INFOID:0000000005260533

AWBIA0863GB

1. Rear engine mounting insulator 2. RH heat shield plate 3. RH engine mounting insulator
4. RH engine mounting bracket 5. LH engine mounting insulator 6. LH engine mounting bracket
7. LH heat shield plate A. Refer to installation Front

Removal and Installation INFOID:0000000005260534

WARNING:
• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS
CATALOG.
CAUTION:
• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exhaust system and engine coolant are cooled sufficiently.
• If items or work required are not covered by the engine section, follow the applicable procedures.
• Always use the support point specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons,
support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.
• For supporting points for lifting and jacking point at rear axle, refer to GI-29, "Garage Jack and
Safety Stand".

REMOVAL
Preparation
1. Release the fuel pressure. Refer to EC-958, "Fuel Pressure Check".

Revision: July 2009 EM-214 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VK56DE]
2. Disconnect the battery negative terminal. Refer to PG-78, "Removal and Installation".
3. Remove engine under cover. Refer to EXT-14, "Removal and Installation". A
4. Drain the engine coolant. Refer to CO-40, "Changing Engine Coolant".
5. Drain the engine oil. Refer to LU-25, "Changing Engine Oil".
EM
6. Partially drain the A/T fluid. Refer to TM-157, "Changing the A/T Fluid (ATF)".
7. Partially drain the transfer fluid. Refer to DLN-135, "Replacement".
8. Remove the engine hood. Refer to DLK-191, "Removal and Installation of Hood Assembly". C
9. Remove the engine room cover using power tool. Refer to EM-160, "Removal and Installation".
10. Remove the air duct and air cleaner case assembly. Refer to EM-161, "Removal and Installation".
11. Disconnect the vacuum hose between the vehicle and engine and set it aside. D
12. Remove the radiator assembly and hoses. Refer to CO-44, "Removal and Installation".
13. Remove the drive belt. Refer to EM-149, "Removal and Installation".
14. Remove the fan blade. Refer to CO-48, "Removal and Installation (Crankshaft Driven Type)". E
15. Disconnect the engine room harness from the fuse box and set it aside.
16. Disconnect the ECM.
F
17. Disconnect the engine room harness from the engine side and set it aside.
18. Disconnect the engine harness grounds.
19. Disconnect the power steering reservoir tank from the engine and move it aside. G
20. Disconnect the power steering oil pump from the engine. Move it aside and secure it using suitable wire or
rope. Refer to ST-24, "Removal and Installation".
21. Remove the A/C compressor bolts and set the compressor aside. Refer to HA-39, "Removal and Installa- H
tion for Compressor".
22. Disconnect the brake booster vacuum line.
23. Disconnect the EVAP line. I
24. Disconnect the fuel hose at the engine side connection. Refer to EM-176, "Removal and Installation".
25. Disconnect the heater hoses at the cowl, and install plugs to avoid leakage of engine coolant.
26. Remove the A/T oil level indicator and indicator tube upper bolts. J
27. Remove the front fender protectors. Refer to EXT-23, "Removal and Installation of Front Fender Protec-
tor".
28. Remove the front final drive assembly. Refer to DLN-387, "Removal and Installation". K
29. Remove the exhaust manifolds. Refer to EM-166, "Removal and Installation".
30. Remove the A/T. Refer to TM-195, "4WD : Removal and Installation".
L
31. Install the engine slingers into the left bank cylinder head (A)
and right bank cylinder head (B).

M
Engine slinger torque: 45.0 N·m (4.6 kg-m, 33 ft-lb)
32. Lift using a hoist and secure the engine in position.
33. Remove engine mounting insulator bolts. N
34. Remove the engine assembly from the vehicle, avoid interfer-
ence with the vehicle body.
CAUTION: O
• Before and during lifting, always check if any harnesses AWBIA0088ZZ

are left connected.

35. Remove the parts that may restrict installation of the engine to the engine stand.
NOTE: P
This procedure is described assuming that you use an engine stand mounting to the surface to which the
transmission mounts.

Revision: July 2009 EM-215 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VK56DE]
a. Before removing the drive plate, put a match mark (A) on the
crankshaft and drive plate for alignment during installation.

ALBIA0522ZZ

b. Remove the drive plate.

• Holding the crankshaft pulley bolt, lock the crankshaft to
remove the drive plate bolts.
• Remove drive plate bolts diagonally.
CAUTION:
• Do not damage the drive plate. Especially, avoid deform-
ing and damaging the signal plate teeth (circumference
position).
• Keep magnetic materials away from signal plate.
• Place the drive plate with the signal plate surface facing
upward.
KBIA2491E

CAUTION:
Use an engine stand that has a load capacity [approximately 240kg (529 lb) or more] large enough
for supporting the engine weight.
• If the load capacity of the stand is not adequate, remove the following parts beforehand to
reduce the potential risk of overturning the stand.
- Remove the fuel tube and fuel injector assembly. Refer to EM-176, "Removal and Installation".
- Remove the intake manifold. Refer to EM-162, "Removal and Installation".
- Remove the ignition coil. Refer to EM-173, "Removal and Installation".
- Remove the rocker cover. Refer to EM-174, "Removal and Installation".
- Other removable brackets.
CAUTION:
Before removing the hanging chains, make sure the engine stand is stable and there is no risk of
overturning.
36. Remove the generator, if necessary. Refer to CHG-21, "Removal and Installation".
37. Remove the engine mounting insulator and bracket using power tool.

INSTALLATION
Installation is in the reverse order of removal.
• Tighten engine mounting bracket bolts in numerical order as
shown.

Engine mounting bracket : 49 N·m (5.0 kg-m, 36 ft-lb)

bolts

AWBIA0820ZZ

CAUTION:
• When replacing an engine or transmission you must make sure the dowels are installed correctly
during re-assembly.

Revision: July 2009 EM-216 2010 Pathfinder

 ENGINE ASSEMBLY
< REMOVAL AND INSTALLATION > [VK56DE]
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of driv-
etrain components. A

INSPECTION AFTER INSTALLATION

• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are EM
lower than required quantity, fill to the specified level. Refer to MA-16, "For North America".
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel C
leakage at the connection points.
• Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE: D
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises. E
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to F
specified level if necessary.
• Summary of the inspection items:
G
Item Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level H
Other oils and fluids* Level Leakage Level
Fuel Leakage Leakage Leakage
I
Exhaust gas — Leakage —
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
J

Revision: July 2009 EM-217 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]

DISASSEMBLY AND ASSEMBLY

ENGINE UNIT
Exploded View INFOID:0000000005260535

WBIA0471E

1. Knock sensor sub-harness 2. Knock sensor 3. Cylinder block

4. Main bearing upper 5. Top ring 6. Second ring
7. Oil ring 8. Crankshaft key 9. Piston
10. Connecting rod 11. Snap ring 12. Piston pin
13. Connecting rod bearing 14. Connecting rod bearing cap 15. Main bearing cap

Revision: July 2009 EM-218 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
16. Thrust bearing lower 17. Main bearing lower 18. Crankshaft
19. Pilot converter 20. Thrust bearing upper 21. Side bolt A
22. Drive plate 23. Reinforcement plate 24. Rear oil seal retainer
25. Rear oil seal 26. Transmission 27. O-ring
28. Crankshaft position sensor (POS) 29. Gasket 30. Cylinder block heater EM
31. Connector cap

Disassembly and Assembly INFOID:0000000005260536 C

DISASSEMBLY
NOTE: D
Explained here is how to disassemble with engine stand supporting transmission surface. When using differ-
ent type of engine stand, some steps may be different.
1. Remove engine assembly from vehicle and mount to engine stand. Refer to EM-214, "Removal and E
Installation".
CAUTION:
Before removing the hanging chains, make sure engine stand is stable and there is no risk of over-
turning. F
2. Drain engine oil. Refer to LU-25, "Changing Engine Oil".
3. Drain engine coolant by removing the cylinder block drain plugs
(A), (B), (C) and (D) as shown. G

WBIA0419E
J
4. Remove the following components and associated parts (the parts referred to in step 1 are not included
here).
• Oil pan (upper and lower) and oil strainer. Refer to EM-169, "Removal and Installation". K
• Crankshaft pulley, front cover and timing chain. Refer to EM-181, "Removal and Installation".
• Camshaft. Refer to EM-189, "Removal and Installation".
• Cylinder head. Refer to EM-204, "Removal and Installation".
L
5. Remove knock sensor and sub harness.
CAUTION:
Carefully handle sensor, avoiding shocks.
M

O
KBIA2549E

6. Check connecting rod side clearance. Refer to EM-226, "Inspection After Disassembly".
P
7. Remove piston and connecting rod assembly as follows.
a. Position the crankshaft pin corresponding to the connecting rod to be removed onto bottom dead center.
b. Remove connecting rod cap.

Revision: July 2009 EM-219 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
c. Push the piston and connecting rod assembly out to the cylinder
head side using suitable tool.

PBIC0086E

8. Remove connecting rod bearings.

CAUTION:
When removing them, note the installation position. Keep them in the correct order.
9. Check piston ring side clearance. Refer to EM-226, "Inspection After Disassembly".
10. Remove piston rings from piston using suitable tool.
CAUTION:
• Do not damage piston.
• Do not damage piston rings by expanding them exces-
sively.

PBIC0087E

11. Remove piston from connecting rod as follows.

a. Remove snap ring using suitable tool.

PBIC0260E

b. Heat piston to 60° to 70°C (140° to 158°F) using suitable tool.

PBIC0261E

Revision: July 2009 EM-220 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
c. Push out piston pin using suitable tool.
A

EM

PBIC0262E

D
12. Separate and remove rear oil seal retainer from cylinder block.
CAUTION:
Do not damage mating surface.
E
13. Remove rear oil seal from rear oil seal retainer.

14. Measure the crankshaft side clearance. Refer to EM-226, "Inspection After Disassembly". F

15. Remove main bearing caps as follows:

• Loosen bolts in several different steps.
G
a. Loosen side bolts (M10) starting from 30 to 21 to remove.
b. Loosen main bearing cap sub bolts (M9) starting from 20 to 11 to
remove. H
c. Loosen main bearing cap bolts (M12) starting from 10 to 1 to
remove.
I

PBIC0090E

J
d. Remove main bearing cap.
• Insert 2 bolts into bolt holes, and then remove main bearing
cap by lifting up and shaking forward and backward.
K

M
KBIA2492E

16. Remove crankshaft.

N
17. Remove the main bearings and thrust bearings from the cylinder block and main bearing caps.
• When removing them, note the installation position. Keep them in the correct order.
O
18. Remove pilot converter using Tool if necessary.

Tool number : ST16610001 (J-23907)

P

WBIA0596E

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
ASSEMBLY
1. Fully air-blow the coolant and oil passages in the cylinder block, cylinder bore, and crankcase to remove
any foreign material.
WARNING:
Use goggles to protect your eyes.
2. Install each plug to the cylinder block (only screw-type plugs are
shown).
• Apply liquid gasket.
Use Genuine Thread Sealant or equivalent. Refer to GI-14,
"Recommended Chemical Products and Sealants".
• Replace copper washers with new ones.
• Tighten each plug as specified below.

Part Washer Tightening torque

A Yes 53.9 N·m (5.5 kg-m, 40 ft-lb)
WBIA0419E
B No 19.6 N·m (2.0 kg-m, 15 ft-lb)
C Yes 62.7 N·m (6.4 kg-m, 46 ft-lb)
D Yes 62.7 N·m (6.4 kg-m, 46 ft-lb)
3. Install main bearings and thrust bearings.
a. Remove any dust, dirt, and oil on the bearing mating surfaces of
the cylinder block and main bearing caps.
b. Install thrust bearings to both sides of the No. 3 journal housing
on the cylinder block and main bearing caps
• Install thrust bearings with the oil groove facing the crankshaft
arm (outside).
• Install thrust bearings with a protrusion in the center on the
main bearing caps.

PBIC0093E

c. Install main bearings paying attention to the direction.

• Install the one with oil holes onto the cylinder block and the
one without oil holes onto the main bearing cap.
• Before installing bearings, apply engine oil to bearing surface
(inside). Do not apply oil to the back surface, but thoroughly
clean it.
• When installing, align the bearing stopper to the notch.
• Ensure the oil holes on the cylinder block and those on the
corresponding bearing are aligned.

PBIC0094E

4. Install pilot converter to the crankshaft using suitable tool.

5. Install crankshaft to the cylinder block.
• While turning crankshaft by hand, make sure it turns smoothly.

EMP0569D

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
6. Install main bearing caps.
• Align the identification number to the journal position to install. A
• Install it with the front mark (indicated by the arrow) facing the
front of engine.
• Tap caps lightly to seat them in the installation position.
EM

KBIA2533E

D
7. Follow the steps below to tighten each main bearing cap bolt.
a. Apply engine oil to threads and seating surfaces of bolts, and
tighten all bolts temporarily. E

Main bearing cap bolts in : 39.2 N·m (4.0 kg-m, 29 ft-lb)

order of 1 to 10
F
Main bearing cap sub : 29.4 N·m (3.0 kg-m, 22 ft-lb)
bolts in order of 11 to 20
G
PBIC0090E

b. Measure tightening angle using Tool.

H
Tool number : KV10112100 (BT-8653-A)
CAUTION:
Measure tightening angle using Tool. Do not measure visu- I
ally.

Main bearing cap bolts in : 40° J

order of 1 to 10
Main bearing cap sub bolts : 30° WBIA0597E
in order of 11 to 20 K
Side bolts in order of 21 to : 49 N·m (5.0 kg-m, 36 ft-lb)
30
L
• Rotate crankshaft by hand after bolts are tightened. Check if it rotates smoothly.
• Check crankshaft side clearance. Refer to EM-226, "Inspection After Disassembly".
8. Install rear oil seal to rear oil seal retainer.
M
CAUTION:
Do not damage or scratch outer circumference of oil seal.
• Install new rear oil seal in the direction shown.
N

SEM715A

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Tap the rear oil seal until it is level with the rear end surface of
rear oil seal retainer.

PBIC0097E

9. Install rear oil seal retainer.

• Apply liquid gasket thoroughly to rear oil seal retainer as
shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-14, "Recommended Chemical Products and Sealants".
• Apply new engine oil on the lips of rear oil seal. Do not touch.

SBIA0391E

10. Install the piston to the connecting rod.

a. Install the snap ring to the grooves of the piston rear side.
• Insert it fully into the groove to install.
b. Install the piston to the connecting rod.
• Heat piston until piston pin can be pushed in by hand without excess force [approx. 60° to 70 C° (140° to
158 °F)]. From the front to the rear, insert the piston pin into the piston and the connecting rod.
• Assemble so that the front mark on the piston crown and the
oil holes and cylinder No. on the connecting rod are positioned
as shown.
c. Install the snap ring to the grooves of the piston front side.
• Insert it fully into the groove to install.
• After installing, make sure connecting rod moves smoothly.

KBIA2534E

11. Install piston rings.

CAUTION:
Do not damage piston.
• Position each ring with the gap as shown, referring to the pis-
ton front mark.
• Install the second ring with the stamped surface facing
upward.

Stamped mark Second ring : 2N

PBIC0100E

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
12. Install the connecting rod bearings to the connecting rod and
connecting rod cap. A
• When installing the connecting rod bearings, apply engine oil
to the bearing surface (inside). Do not apply oil to the back
surface, but thoroughly clean it.
EM
• When installing, align the connecting rod bearing stopper pro-
trusion with the cutout of the connecting rod to install.
• Check that the oil holes on the connecting rod and those on
the corresponding bearing are aligned. C

PBIC0266E

D
13. Install the piston and connecting rod assembly to the crankshaft
using Tool.
E
Tool number : EM03470000 (J-8037)
• Position the crankshaft pin corresponding to the connecting
rod to be installed onto bottom dead center. F
• Apply engine oil sufficiently to the cylinder bore, piston, and
crankshaft pin.
• Match the cylinder position with the cylinder No. on the con-
necting rod to install. G
• Install the piston with the front mark on the piston crown facing WBIA0626E

the front of the engine.

CAUTION: H
Be careful not to damage the crankshaft pin, resulting from an interference of the connecting rod
big end.

14. Install connecting rod cap. I

• Match the stamped cylinder number marks on the connecting
rod with those on the cylinder cap to install.
J

L
KBIA2536E

15. Tighten connecting rod bolts using Tool.

M
Tool number : KV10112100 (BT-8653-A)

Connecting rod bolts N

Step 1 : 19.6 N·m (1.5 kg-m, 11 ft-lb)
Step 2 : 90° clockwise
O
• Apply engine oil to threads and seats of connecting rod bolts.
• After tightening bolts, make sure the crankshaft rotates
smoothly. WBIA0627E

• Check connecting rod side clearance. Refer to EM-226, P

"Inspection After Disassembly".

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
16. Install knock sensors.
CAUTION:
If knock sensor is dropped, replace it with a new one.
• Make sure that there is no foreign material on the cylinder
block mating surface and the back surface of knock sensor.
• Install it with its connector facing the center of the cylinder
block side.
• Do not tighten knock sensor bolts while holding connector.
• Make sure knock sensor does not interfere with other parts.

KBIA2493E

• Position the sub-harness as shown before installing intake

manifold.

KBIA2549E

17. Installation of the remaining components is in the reverse order of removal.

18. Remove engine assembly from engine stand.
19. Install drive plate.
• Align dowel pin of crankshaft rear end with pin holes of each
part to install.

KBIA2494E

• Install drive plate, reinforcement plate and pilot converter (if

not installed in step 4) as shown.
• Face the chamfered or rounded edge side to the crankshaft.

KBIA2537E

Inspection After Disassembly INFOID:0000000005260537

CRANKSHAFT END PLAY

Revision: July 2009 EM-226 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Move the crankshaft fully forward and backward and measure the
clearance between the thrust bearings and crankshaft arm using A
suitable tool.

Standard : 0.10 - 0.26 mm (0.0039 - 0.0102 in) EM

Limit : 0.30 mm (0.0118 in)
• If measured value exceeds the repair limit, replace the thrust bear-
ings, and measure again. If it still exceeds the repair limit, replace C
crankshaft also.
PBIC0114E

D
CONNECTING ROD SIDE CLEARANCE
• Measure side clearance between the connecting rod and crank-
shaft arm using suitable tool.
E
Standard : 0.20 - 0.40 mm (0.0079 - 0.0157 in)
Limit : 0.40 mm (0.0157 in)
F
• If measured value exceeds the repair limit, replace the connecting
rod bearings, and measure again. If it still exceeds the repair limit,
replace the crankshaft also.
G

PBIC0115E

PISTON AND PISTON PIN CLEARANCE H

Piston Pin Hole Diameter
• Measure diameter of piston pin hole using suitable tool.
I
Standard : 21.993 - 21.999 mm (0.8659 - 0.8661 in)

PBIC0116E
L
Piston Pin Outer Diameter
• Measure diameter of piston pin using suitable tool.
M
Standard : 21.989 - 21.995 mm (0.8657 - 0.8659 in)

PBIC0117E

Piston to Piston Pin Clearance P

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
(Piston pin clearance) = (Piston pin hole diameter) – (Piston pin
diameter)

Standard : 0.002 - 0.006 mm (0.0001 - 0.0002 in)

• If clearance exceeds specification, replace either or both the pis-
ton/piston pin assembly and the connecting rod assembly with ref-
erence to the specification of each part.
• Use the piston selection table to replace piston/piston pin assem-
bly. Refer to EM-237, "How to Select Piston and Bearing".
• Use the connecting rod bearing selection table to replace connect-
ing rod. Refer to EM-237, "How to Select Piston and Bearing". KBIA2496E

NOTE:
The connecting rod small end grade and piston pin hole (piston
pin) grade are provided only for the parts installed at the plant. For
service parts, no grades can be selected (only 0 grade is avail-
able).
• Follow the connecting rod bushing oil clearance (small end) proce-
dure for the values for each grade at the plant.

KBIA2536E

PISTON RING SIDE CLEARANCE

• Measure side clearance of the piston ring and piston ring groove
using suitable tool.

Standard:
Top ring : 0.035 - 0.085 mm (0.0014 - 0.0033 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.015 - 0.185 mm (0.0006 - 0.0073 in)

Limit:
SEM024AA
Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.0039 in)
• If out of specification, replace piston and/or piston ring assembly.
PISTON RING END GAP
• Check if the diameter of the cylinder bore is within specification.
Follow the "Piston to Cylinder Bore Clearance" procedure.
• Insert the piston ring into the middle of the cylinder using the pis-
ton, and measure the gap.

Standard
Top ring : 0.23 - 0.33 mm (0.0091 - 0.0130 in)
2nd ring : 0.25 - 0.40 mm (0.0098 - 0.0157 in)
Oil ring : 0.20 - 0.60 mm (0.0079 - 0.0236 in)
PBIC0118E

Limit:
Top ring : 0.56 mm (0.0220 in)
2nd ring : 0.52 mm (0.0205 in)
Oil ring : 0.96 mm (0.0378 in)
• If out of specification, replace piston ring.

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
CONNECTING ROD BEND AND TORSION
• Check connecting rod alignment using suitable tool. A

Limit:
Bend EM
: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length
Torsion
C
: 0.30 mm (0.0118 in) per 100 mm (3.94 in) length

D
SEM003F

• If measurement exceeds the limit, replace connecting rod assem- E

bly.

SEM038F H
CONNECTING ROD DIAMETER (BIG END)
• Install the connecting rod cap without the connecting rod bearing
installed. After tightening the connecting rod bolt to the specified I
torque, measure the connecting rod large end inside diameter.
Refer to EM-219, "Disassembly and Assembly".
J
Standard : 57.000 - 57.013 mm (2.2441 - 2.2446 in)
• If measurement exceeds the standard, replace connecting rod.
K

PBIC1641E
L
CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)
Connecting Rod Inside Diameter (Small End)
• Measure inside diameter of connecting rod bushing using suitable M
tool.

Standard : 22.000 - 22.006 mm (0.8661 - 0.8664 in) N

PBIC0120E
P

Piston Pin Diameter

Revision: July 2009 EM-229 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Measure diameter of piston pin using suitable tool.

Standard : 21.989 - 21.995 mm (0.8657 - 0.8659 in)

PBIC0117E

Connecting Rod Bushing Oil Clearance (Small End)

(Connecting rod small end oil clearance) = (Inside diameter of con-
necting rod small end) – (Piston pin diameter)

Standard : 0.005 - 0.017 mm (0.0002 - 0.0007 in)

• If measured value exceeds the standard, replace the connecting
rod assembly and/or piston and piston pin assembly.
• If replacing the piston and piston pin assembly, use the Table for
Selective Fitting for Piston to select the piston corresponding to the
applicable bore grade of the cylinder block to be used. Refer to
EM-237, "How to Select Piston and Bearing".
KBIA2536E

Factory installed parts grading:

• Only grade 0 is available.
Unit: mm (in)
Grade 0
22.000 - 22.006
Connecting rod bushing inside diameter
(0.8661 - 0.8664)
21.989 - 21.995
Piston pin diameter
(0.8657 - 0.8659)
21.993 - 21.999
Piston pin hole diameter
(0.8659 - 0.8661)
KBIA2496E

CYLINDER BLOCK DISTORTION

• Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder block surface.
CAUTION:
Do not allow any debris to enter the engine oil or engine coolant passages.
• Measure block upper face for distortion in six directions as shown.

Standard : 0.03 mm (0.0012 in)

Limit : 0.1 mm (0.004 in)
• If measurement exceeds the limit, replace cylinder block.

SEM123C

MAIN BEARING HOUSING INSIDE DIAMETER

Revision: July 2009 EM-230 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Install the main bearing caps with the main bearings removed, and
tighten the bolts to the specified torque. Refer to EM-219, "Disas- A
sembly and Assembly".
• Measure inside diameter of main bearing housing.
EM
Standard : 68.944 - 68.968 mm (2.7143 - 2.7153 in)
• If out of the standard, replace cylinder block and main bearing
caps as an assembly. C
NOTE:
These components must be replaced as a single unit, because
they were processed together. PBIC1643E

D
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Diameter
• Measure the cylinder bore for wear, out-of-round and taper at six E
different points on each cylinder [(X) and (Y) directions at (A), (B)
and (C)].
NOTE:
F
When determining cylinder bore grade, measure cylinder bore at
(B) position.

PBIC0123E H

Standard diameter: I
98.000 - 98.030 mm (3.8583 - 3.8594 in)
Wear limit:
J
0.20 mm (0.0079 in)
Out-of-round (Difference between ″X″ and ″Y″):
Limit: 0.015 mm (0.0006 in) K
Taper limit (Difference between ″A″ and ″C″):
Limit: 0.010 mm (0.0004 in) PBIC0124E
L
• If measured value exceeds the repair limit, or if there are scratches and/or seizure on the cylinder inner wall,
hone or bore the inner wall.
Piston Skirt Diameter M
• Measure piston skirt diameter using suitable tool.

Standard : 97.980 - 98.010 mm (3.8575 - 3.8587 in)

N

P
PBIC0125E

Revision: July 2009 EM-231 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Measure point ″H″.

Distance from the top : 39 mm (1.54 in)

KBIA2545E

Piston to Cylinder Bore Clearance

• Calculate by using diameter of the piston skirt and the cylinder bore diameter (direction X, position B).
(Clearance) = (Cylinder bore diameter) – (piston skirt diameter)

Standard : 0.010 - 0.030 mm (0.0004 - 0.0012 in)

Limit : 0.08 mm (0.0031 in)
• If calculation exceeds the limit, replace piston/piston pin assembly.
Reboring Cylinder Bore
1. Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter (A).

Rebored size calculation: D = A +B - C

where,
D: Bored diameter
A: Piston diameter as measured
B: Piston - to - bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)
2. Install main bearing caps, and tighten them to the specified torque. Otherwise, cylinder bores may be dis-
torted in final assembly.
3. Cut the cylinder bores.
NOTE:
• When any cylinder needs boring, all other cylinders must also be bored.
• Do not cut too much out of cylinder bore at one time. Cut only 0.05 mm (0.0020 in) or so in diameter at a
time.
4. Hone cylinders to obtain the specified piston-to-bore clearance.
5. Measure finished cylinder bore for out-of-round and taper.
NOTE:
Measurement should be done after cylinder bore cools down.
CRANKSHAFT MAIN JOURNAL DIAMETER
• Measure diameter of crankshaft journals.

Standard : 63.940 - 63.964 mm (2.5173 - 2.5183 in)

• If measurement is out of standard, measure the main bearing oil clearance. Then use the undersize bearing.
CRANKSHAFT PIN JOURNAL DIAMETER

Revision: July 2009 EM-232 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Measure diameter of crankshaft pin using suitable tool.
A
Standard : 53.956 - 53.974 mm (2.1243 - 2.1250 in)
• If measurement is out of standard, measure connecting rod bear-
ing oil clearance. Then use undersize bearing. EM

PBIC0127E

D
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
• Measure dimensions at four different points as shown on each
journal and pin.
• Out-of-roundness is indicated by the difference in dimension E
between (X) and (Y) at (A) and (B).
• Taper is indicated by the difference in dimension between (A) and
(B) at (X) and (Y). F

Limit
Out-of-round [Difference between (X) and (Y)] G
: 0.002 mm (0.0001 in)
PBIC1685E
Taper [Difference between (A) and (B)]
: 0.002 mm (0.0001 in) H

• If measured value exceeds the standard, correct or replace crankshaft.

• If corrected, measure the bearing oil clearance of the corrected journal or pin. Then select the main bearing
or connecting rod bearing. I

CRANKSHAFT RUNOUT
• Place a V-block on a precise flat table to support the journals on J
both ends of the crankshaft.
• Measure at No. 3 journal using suitable tool.
• While rotating crankshaft, read the movement of the pointer.
• Half of the movement shows the runout. K

Limit : Less than 0.05 mm (0.002 in)

L
• If measurement exceeds the limit, replace crankshaft.

PBIC0129E M
CONNECTING ROD BEARING OIL CLEARANCE
Method of Measurement
N
• Install connecting rod bearings to the connecting rod and cap. Tighten connecting rod bolts to the specified
torque. Refer to EM-219, "Disassembly and Assembly".
Measure inside diameter of connecting rod bearing.
(Oil clearance) = (Inside diameter of connecting rod bearing) – O
(Crankshaft pin diameter)

Standard : 0.020 - 0.039 mm (0.0008 - 0.0015 in) P

Limit : 0.055 mm (0.0022 in)
• If clearance cannot be adjusted within the standard, grind crank-
shaft pin and use undersized bearing. Refer to EM-237, "How to
Select Piston and Bearing".
PBIC1642E

Method of Using Plastigage

Revision: July 2009 EM-233 2010 Pathfinder

 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Remove oil and dust on the crankshaft pin and surfaces of each
bearing completely.
• Cut a plastigage slightly shorter than the bearing width, and place
it in the crankshaft axial direction, avoiding oil holes.
• Install the connecting rod bearings to the connecting rod and con-
necting rod bearing cap, and tighten the connecting rod bolts to the
specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.
• Remove the connecting rod bearing cap and bearings. Measure
the plastigage width using the scale on the plastigage bag.
KBIA2550E
NOTE:
The procedure when the measured value exceeds the repair limit is the same as that described in “Method
of Measurement”.
MAIN BEARING OIL CLEARANCE
Method of Measurement
• Install the main bearings to the cylinder block and main bearing
cap. Measure the main bearing inside diameter with the bearing
cap bolts tightened to the specified torque. Refer to EM-219, "Dis-
assembly and Assembly".
(Oil clearance) = (Inside diameter of main bearing) – (Crankshaft
journal diameter)

Standard:
No. 1 and 5 journals
: 0.001 - 0.011 mm (0.00004 - 0.0004 in)
PBIC1644E
No. 2, 3 and 4 journals
: 0.007 - 0.017 mm (0.0003 - 0.0007 in)
Limit:
No.1 and 5 journals
: 0.021 mm (0.0008 in)
No. 2, 3 and 4 journals
: 0.027 mm (0.0011 in)
• If measured value exceeds the repair limit, select main bearings referring to the main bearing inside diame-
ter and crankshaft journal diameter, so that the oil clearance satisfies the standard. Refer to EM-237, "How
to Select Piston and Bearing".
Method of Using Plastigage
• Remove oil and dust on the crankshaft journal and surfaces of
each bearing completely.
• Cut a plastigage slightly shorter than the bearing width, and place
it in crankshaft axial direction, avoiding oil holes.
• Install the main bearings to the cylinder block and main bearing
cap, and tighten the main bearing bolts to the specified torque.
CAUTION:
Do not rotate crankshaft with plastigage installed.
• Remove bearing cap and bearings. Measure plastigage width
using the scale on the plastigage bag.
NOTE:
KBIA2551E
The procedure when the measured value exceeds the repair limit
is the same as that described in “Method of Measurement”.
CRUSH HEIGHT OF MAIN BEARING

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• When the bearing cap is removed after being tightened to the
specified torque with main bearings installed, the tip end of the A
bearing must protrude. Refer to EM-219, "Disassembly and
Assembly" for the tightening procedure.
EM
Standard : There must be crush height
• If standard is not met, replace main bearings.
C

SEM502G

D
CRUSH HEIGHT OF CONNECTING ROD BEARING
• When connecting rod bearing cap is removed after being tightened
to the specified torque with the connecting rod bearings installed,
the tip end of the bearing must protrude. Refer to EM-219, "Disas- E
sembly and Assembly" for tightening procedure.

Standard : There must be crush height. F

• If standard is not met, replace connecting rod bearings.

PBIC1646E

MAIN BEARING CAP BOLT DIAMETER H

• Check for bolts (M9 and M12) installed from lower side using the
following procedure.
NOTE:
I
• Side bolt (M10) is outside the target.
• Figure shows M12 bolt.
• Measure bolt diameter (d1) from tip of the bolt to dimension (a).
• Measure bolt diameter (d2) from the dimension between tip of the J
bolt and dimension (b) as base station to dimension (c).
NOTE:
If a narrower part in the threads is determined by visual check, K
measure (d2) at that point.
KBIA2497E
• Calculate the difference between (d1) and (d2).
M9 bolt
L
Dimension (a) : 9 mm (0.35 in)
Dimension (b) : 15 mm (0.59 in)
Dimension (c) : 20 mm (0.79 in) M
Limit : 0.15 mm (0.0059 in)
M12 bolt
Dimension (a) : 12 mm (0.47 in) N
Dimension (b) : 55 mm (2.17 in)
Dimension (c) : 20 mm (0.79 in) O
Limit : 0.15 mm (0.0059 in)
• Replace applicable bolts if outside the limit.
P
CONNECTING ROD BOLT DIAMETER

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 ENGINE UNIT
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
• Measure diameter ″d″ at position shown.
• When “d” is out of specifications (when it becomes thinner),
replace bolt with a new one.

Limit : 7.75 mm (0.3051 in) or less.

SBIA0286E

DRIVE PLATE
• Check drive plate and signal plate for deformation or cracks.
CAUTION:
• Do not disassemble drive plate.
• Do not place drive plate with signal plate facing down.
• When handling signal plate, take care not to damage or
scratch it.
• Handle signal plate in a manner that prevents it from becom-
ing magnetized.
• If anything is found, replace drive plate.

PBIC2938E

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
HOW TO SELECT PISTON AND BEARING
A
How to Select Piston and Bearing INFOID:0000000005260538

DESCRIPTION EM

Connecting points Connecting parts Selection items Selection methods

Determined by match of cylin- C
der block bearing housing
Between cylinder block to Main bearing grade (bearing
Main bearing grade (Housing inside diame-
crankshaft thickness)
ter) and crankshaft journal
grade (journal outside diameter) D
Connecting rod bearing grade =
crankshaft pin grade (pin diam-
Between crankshaft to connect- Connecting rod bearing grade
Connecting rod bearing eter). No grade exists for inside E
ing rod (bearing thickness)
diameter of connecting rod
large end.
Piston and piston pin assembly. F
Between cylinder block to pis- Piston grade = cylinder bore
The piston is available together Piston grade (piston diameter)
ton grade (diameter of bore)
with piston pin as an assembly.
*Between piston to connecting
— — — G
rod
*For the service parts, the grade for fitting cannot be selected between a piston pin and a connecting rod.
(Only 0 grade is available.) The information at the shipment from the plant is described as a reference.
• The identification grade stamped on each part is the grade for the dimension measured in new condition. H
This grade cannot apply to reused parts.
• For reused or repaired parts, measure the dimension accurately. Determine the grade by comparing the
measurement with the values of each selection table. I
• For details of the measurement method of each part, the reuse standards, and the selection method of the
selective fitting parts, follow the applicable procedures.
J
HOW TO SELECT PISTON
Piston Selective Fitting When New Cylinder Block is Used:
• Check the cylinder bore grade on the bottom face of the cylinder K
block, and select the piston of the same grade.

KBIA2495E
N

KBIA2496E

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
When Cylinder Block is Reused
1. Measure cylinder block bore diameter.
2. Determine the bore grade by comparing the measurement with the values under the “Cylinder bore diam-
eter” of the piston selection table.
Piston Selection Table
Unit: mm (in)

Grade number (Mark) 1 2 3

Cylinder bore diameter 98.000-98.010 (3.8583-3.8587) 98.010-98.020 (3.8587-3.8590) 93.020-98.030 (3.8590-3.8594)
Piston diameter 97.980-97.990 (3.8575-3.8579) 97.990-98.000 (3.8579-3.8583) 98.000-98.010 (3.8583-3.8587)
NOTE:
• The piston is available together with piston pin as an assembly.
• The piston pin (piston pin bore) grade is provided only for the parts installed at the plant. For service parts,
no grades can be selected (only 0 grade is available).

HOW TO SELECT CONNECTING ROD BEARING

When New Connecting Rod and Crankshaft are Used
1. Apply the big end inside diameter grade stamped on the con-
necting rod side face to the row in the “Connecting Rod Bearing
Selection Table”.

KBIA2536E

2. Apply the pin diameter grade stamped on the crankshaft front

side to the column in the “Connecting Rod Bearing Selection
Table”.
3. Read the symbol at the cross point of the selected row and col-
umn in the “Connecting Rod Bearing Selection Table”.
4. Apply the symbol obtained to the "Connecting Rod Bearing
Grade Table" to select.

PBIC0110E

When Crankshaft and Connecting Rod are Reused

1. Measure dimensions of the big end inside diameter of the connecting rod and diameter of the crankshaft
pin individually.
2. Apply the measured dimension to the “Connecting Rod Bearing Selection Table”.
3. The following steps are the same as in “When New Connecting Rod and Crankshaft are Used”.

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
Connecting Rod Bearing Selection Table
A

EM

KBIA2538E F
Connecting Rod Bearing Grade Table.

Grade number Thickness “T” mm (in) Identification color (mark) G

0 1.500 - 1.503 (0.0591 - 0.0592) Black
1 1.503 - 1.506 (0.0592 - 0.0593) Brown
H
2 1.506 - 1.509 (0.0593 - 0.0594) Green
3 1.509 - 1.512 (0.0594 - 0.0595) Yellow

Undersize Bearings Usage Guide I

• When the specified oil clearance is not obtained with standard size connecting rod bearings, use undersize
(US) bearings.
• When using undersize bearing, measure the bearing inside diameter with the bearing installed, and grind the J
crankshaft pin so that the oil clearance satisfies the standard.
Bearing undersize table
Unit: mm (in)
K
Undersize Thickness
0.25 (0.0098) 1.627 - 1.635 (0.0641 - 0.0644)

CAUTION: L
In grinding the crankshaft pin to use undersize bearings, keep
the fillet R (All crankshaft pins).
M
Fillet R : 1.5 - 1.7 mm (0.059 - 0.067 in)
PBIC0111E

HOW TO SELECT MAIN BEARING N

When New Cylinder Block and Crankshaft are Used
1. Apply the main bearing housing grade on the bottom face of the
cylinder block to the row in "Main Bearings Selection Table". O

KBIA2495E

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
2. Apply the journal diameter grade on the crankshaft front to the
column in "Main Bearings Selection Table".

PBIC0110E

3. Read the symbol at the cross point of the selected row and column in the "Main Bearings Selection Table".
CAUTION:
• Initial clearance for No. 1, 5 journal and No. 2, 3, 4 journal is different. Use two different selection
lists for each part.
• No. 1, 5 journal and No. 2, 3, 4 journal have the same signs but different measures. Do not con-
fuse them.

4. Apply the symbol to the "Main Bearings Grade Table" to select.

NOTE:
• Grade list applies to all journals.
• Service parts are available as a set of both upper and lower.

When Cylinder Block and Crankshaft are Reused

1. Measure the inside diameter of the cylinder block main bearings housing and the outside diameter of the
crankshaft journal.
2. Apply measurement in above step 1 to "Main Bearings Selection Table".
3. The following steps are same as in “When New Cylinder Block and Crankshaft are Used”.

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
Main Bearings Selection Table (No. 1 and No. 5 journal)
A

EM

L
WBIA0608E

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
Main Bearings Selection Table (No. 2, 3 and 4 journal)

WBIA0609E

Main Bearings Grade Table (All Journals)

Unit: mm (in)

Grade number UPR/LWR Thickness Identification color Remarks

0 — 2.483 - 2.486 (0.0978 - 0.0979) Black
1 — 2.486 - 2.489 (0.0979 - 0.0980) Brown
2 — 2.489 - 2.492 (0.0980 - 0.0981) Green
3 — 2.492 - 2.495 (0.0981 - 0.0982) Yellow
Grade is the same for upper
4 — 2.495 - 2.498 (0.0982 - 0.0983) Blue
and lower bearings.
5 — 2.498 - 2.501 (0.0983 - 0.0985) Pink
6 — 2.501 - 2.504 (0.0985 - 0.0986) Purple
7 — 2.504 - 2.507 (0.0986 - 0.0987) White
8 — 2.507 - 2.510 (0.0987 - 0.0988) Red

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 HOW TO SELECT PISTON AND BEARING
< DISASSEMBLY AND ASSEMBLY > [VK56DE]
UPR 2.483 - 2.486 (0.0978 - 0.0979) Black
01 A
LWR 2.486 - 2.489 (0.0979 - 0.0980) Brown
UPR 2.486 - 2.489 (0.0979 - 0.0980) Brown
12
LWR 2.489 - 2.492 (0.0980 - 0.0981) Green EM
UPR 2.489 - 2.492 (0.0980 - 0.0981) Green
23
LWR 2.492 - 2.495 (0.0981 - 0.0982) Yellow
UPR 2.492 - 2.495 (0.0981 - 0.0982) Yellow C
34
LWR 2.495 - 2.498 (0.0982 - 0.0983) Blue Grade and color are different
UPR 2.495 - 2.498 (0.0982 - 0.0983) Blue for upper and lower bearings.
45 D
LWR 2.498 - 2.501 (0.0983 - 0.0985) Pink
UPR 2.498 - 2.501 (0.0983 - 0.0985) Pink
56
LWR 2.501 - 2.504 (0.0985 - 0.0986) Purple E
UPR 2.501 - 2.504 (0.0985 - 0.0986) Purple
67
LWR 2.504 - 2.507 (0.0986 - 0.0987) White
F
UPR 2.504 - 2.507 (0.0986 - 0.0987) White
78
LWR 2.507 - 2.510 (0.0987 - 0.0988) Red

Use Undersize Bearing Usage Guide G

• Use undersize (US) bearing when the oil clearance with standard size main bearing is not within specifica-
tion.
• When using undersize (US) bearing, measure the inside diameter of the bearing installed and grind the jour- H
nal until the oil clearance falls within specification.
Bearing undersize table
Unit: mm (in)
I
Undersize Thickness
0.25 (0.0098) 2.618 - 2.626 (0.1031 - 0.1034)

CAUTION: J
Do not damage fillet R when grinding crankshaft journal in
order to use undersized bearing (All journals).
K
Fillet R : 1.5 - 1.7 mm (0.059 - 0.067 in)
PBIC0111E

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]

SERVICE DATA AND SPECIFICATIONS (SDS)

SERVICE DATA AND SPECIFICATIONS (SDS)
Standard and Limit INFOID:0000000005260539

GENERAL SPECIFICATIONS

Cylinder arrangement V-8

3 3 5,552 (338.80)
Displacement cm (in )
Bore and stroke mm (in) 98 x 92 (3.86 x 3.62)
Valve arrangement DOHC
Firing order 1-8-7-3-6-5-4-2
Compression 2
Number of piston rings
Oil 1
Number of main bearings 5
Compression ratio 9.8:1
Standard 1,520 (15.5, 220)/200
Compression pressure
Minimum 1,324 (13.5, 192)/200
kPa (kg/cm2, psi)/rpm
Differential limit between cylinders 98 (1.0, 14)/200

Cylinder number

SEM957C

Valve timing

PBIC0187E

Unit: degree
a b c d e f
244° 232° 8° 60° 10° 54°

DRIVE BELTS

Tension of drive belts Auto adjustment by auto tensioner

EXHAUST MANIFOLD

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Unit: mm (in)

Items Limit A
Surface distortion Exhaust manifold 0.3 (0.012)

SPARK PLUG EM
Unit: mm (in)

Make NGK
Standard type* DILFR5A-11 C
Gap (nominal) 1.1 (0.043)
*: Always check with the Parts Department for the latest parts information
D
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)

Items Standard E
Camshaft runout [TIR*] Less than 0.02 (0.0008)

I
SEM671

Intake 44.865 - 45.055 (1.7663 - 1.7738)

Camshaft cam height “A” Exhaust 45.075 - 45.265 (1.7746 - 1.7821) J
Cam wear limit 0.02 (0.0008)
Outside diameter of camshaft journal 25.950 - 25.970 (1.0217 - 1.0224)
Camshaft bracket inside diameter 26.000 - 26.021 (1.0236 - 1.0244) K
Camshaft journal clearance 0.030 - 0.071 (0.0012 - 0.0028)
Camshaft end play 0.115 - 0.188 (0.0045 - 0.0074)
L
Camshaft dimension (A) for No. 1 journal 30.500 - 30.548 (1.2008 - 1.2027)
Cylinder head dimension (B) for No. 1 journal 30.360 - 30.385 (1.1953 - 1.1963)
Camshaft sprocket runout [TIR*] Less than 0.15 (0.0059) M
*: Total indicator reading

Valve Seal N
Unit: mm (in)

Items Standard
Height (H) (without valve spring installed) 14.300 - 14.900 (0.5630 - 0.5870) O
Valve Lifter
Unit: mm (in)
P
Items Standard
Valve lifter diameter 33.977 - 33.987 (1.3377 - 1.3381)
Valve lifter hole diameter 34.000 - 34.016 (1.3386 - 1.3392)
Clearance between lifter and lifter guide 0.013 - 0.039 (0.0005 - 0.0015)

Valve Clearance

Revision: July 2009 EM-245 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Unit: mm (in)

Items Hot* Cold

Intake 0.304 - 0.416 (0.012 - 0.016) 0.26 - 0.34 (0.010 - 0.013)
Exhaust 0.308 - 0.432 (0.012 - 0.017) 0.29 - 0.37 (0.011 - 0.015)
*: Approximately 80°C (176°F)

Available Valve Lifter

Unit: mm (in)

Identification (stamped) Mark* Thickness

SEM758G

N788 7.88 (0.3102)

N790 7.90 (0.3110)
N792 7.92 (0.3118)
N794 7.94 (0.3126)
N796 7.96 (0.3134)
N798 7.98 (0.3142)
N800 8.00 (0.3150)
N802 8.02 (0.3157)
N804 8.04 (0.3165)
N806 8.06 (0.3173)
N808 8.08 (0.3181)
N810 8.10 (0.3189)
N812 8.12 (0.3197)
N814 8.14 (0.3205)
N816 8.16 (0.3213)
N818 8.18 (0.3220)
N820 8.20 (0.3228)
N822 8.22 (0.3236)
N824 8.24 (0.3244)
N826 8.26 (0.3252)
N828 8.28 (0.3260)
N830 8.30 (0.3268)
N832 8.32 (0.3276)
N834 8.34 (0.3283)
N836 8.36 (0.3291)
*: Always check with the Parts Department for the latest parts information

CYLINDER HEAD

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Unit: mm (in)

Items Standard Limit A

Head surface distortion 0.03 (0.0012) 0.1 (0.004)
Nominal cylinder head height “H” 126.3 (4.97)
EM

KBIA2554E

Spark Plug Tube F

Unit: mm (in)

KBIA1248E
J
Items Standard
Press fit height "H" 38.400 - 39.400 (1.512 - 1.551)

Valve Dimensions K
Unit: mm (in)

SEM188 O
Intake 37.0 - 37.3 (1.457 - 1.469)
Valve head diameter “D”
Exhaust 31.2 - 31.5 (1.228 - 1.240)
P
Intake 96.21- 96.71 (3.7878 - 3.8075)
Valve length “L”
Exhaust 93.74 - 94.24 (3.6905 - 3.7102)
Intake 5.965 - 5.980 (0.2348 - 0.2354)
Valve stem diameter “d”
Exhaust 5.955 - 5.970 (0.2344 - 0.2350)
Intake
Valve seat angle “α” 45°15′ - 45°45′
Exhaust

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Intake 1.1 (0.043)
Valve margin “T”
Exhaust 1.3 (0.051)

Valve Guide
Unit: mm (in)

KBIA2555E

Items Standard Oversize [0.2 (0.008)] (service)

Outside diameter 10.023 - 10.034 (0.3946 - 0.3950) 10.223 - 10.234 (0.4025 - 0.4029)
Valve guide
Inside diameter (Finished size) 6.000 - 6.018 (0.2362 - 0.2369) —
Cylinder head valve guide hole diameter 9.975 - 9.996 (0.3927 - 0.3935) 10.175 - 10.196 (0.4006 - 0.4014)
Interference fit of valve guide 0.027 - 0.059 (0.0011 - 0.0023)
Items Standard Limit
Intake 0.020 - 0.053 (0.0008 - 0.0021) 0.08 (0.0031)
Stem to guide clearance
Exhaust 0.030 - 0.063 (0.0012 - 0.0025) 0.09 (0.0035)
Intake 12.6 - 12.8 (0.496 - 0.504)
Projection length “L”
Exhaust 12.5 - 12.9 (0.492 - 0.508)

Valve Seat
Unit: mm (in)

KBIA2541E

Items Standard Oversize [0.5 (0.020)] (Service)

Intake 38.000 - 38.016 (1.4961 - 1.4967) 38.500 - 38.516 (1.5157 - 1.5164)
Cylinder head seat recess diameter ″D″
Exhaust 32.200 - 32.216 (1.2677 - 1.2683) 32.700 - 32.716 (1.2874 - 1.2880)
Intake 0.081 - 0.113 (0.0032 - 0.0044)
Valve seat interference fit
Exhaust 0.064 - 0.096 (0.0025 - 0.0038)
Intake 38.097 - 38.113 (1.4999 - 1.5005) 38.597 - 38.613 (1.5196 - 1.5202)
Valve seat diameter ″d″
Exhaust 32.280 - 32.296 (1.2709 - 1.2715) 32.780 - 32.796 (1.2905 - 1.2912)

Valve Spring

Free height mm (in) 50.58 (1.9913)

Revision: July 2009 EM-248 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Installation 165.8 - 187.0 (16.9 - 19.1, 37 - 42) at 37.0 (1.457)
Pressure N (kg, lb) at height mm (in) A
Valve open 314.8 - 355.0 (32.1 - 36.2, 71 - 80) at 28.2 (1.110)
Out-of-square mm (in) Less than 2.2 (0.087)

CYLINDER BLOCK EM
Unit: mm (in)

PBIC0123E F
Standard 0.03 (0.0012)
Surface flatness
LImit 0.1 (0.004)
G
Main bearing housing inside diameter Standard 68.944 - 68.968 (2.7143 - 2.7153)
Grade No. 1 98.000 - 98.010 (3.8583 - 3.8587)
Standard Grade No. 2 98.010 - 98.020 (3.8587 - 3.8590) H
Cylinder bore diameter
Grade No. 3 98.020 - 98.030 (3.8590 - 3.8594)
Wear limit 0.20 (0.0079)
I
Out-of-round (Difference between ″X″ and ″Y″) 0.015 (0.0006)
Limit
Taper (Difference between ″A″ and ″C″) 0.010 (0.0004)
Grade No. A 68.944 - 68.945 (2.7143 - 2.7144) J
Grade No. B 68.945 - 68.946 (2.7144 - 2.7144)
Grade No. C 68.946 - 68.947 (2.7144 - 2.7144)
Grade No. D 68.947 - 68.948 (2.7144 - 2.7145)
Grade No. E 68.948 - 68.949 (2.7145 - 2.7145) K
Grade No. F 68.949 - 68.950 (2.7145 - 2.7146)
Grade No. G 68.950 - 68.951 (2.7146 - 2.7146)
Grade No. H 68.951 - 68.952 (2.7146 - 2.7146)
Grade No. J 68.952 - 68.953 (2.7146 - 2.7147) L
Grade No. K 68.953 - 68.954 (2.7147 - 2.7147)
Grade No. L 68.954 - 68.955 (2.7147 - 2.7148)
Main journal inside diameter grade (Without bearing) Grade No. M 68.955 - 68.956 (2.7148 - 2.7148)
Grade No. N 68.956 - 68.957 (2.7148 - 2.7148)
M
Grade No. P 68.957 - 68.958 (2.7148 - 2.7149)
Grade No. R 68.958 - 68.959 (2.7149 - 2.7149)
Grade No. S 68.959 - 68.960 (2.7149 - 2.7150) N
Grade No. T 68.960 - 68.961 (2.7150 - 2.7150)
Grade No. U 68.961 - 68.962 (2.7150 - 2.7150)
Grade No. V 68.962 - 68.963 (2.7150 - 2.7151)
Grade No. W 68.963 - 68.964 (2.7151 - 2.7151) O
Grade No. X 68.964 - 68.965 (2.7151 - 2.7152)
Grade No. Y 68.965 - 68.966 (2.7152 - 2.7152)
Grade No. 4 68.966 - 68.967 (2.7152 - 2.7152)
Grade No. 7 68.967 - 68.968 (2.7152 - 2.7153) P
Difference in bore diameter between cylinders Standard Less than 0.03 (0.0012)

PISTON, PISTON RING AND PISTON PIN

Available Piston

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 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Unit: mm (in)

PBIC0188E

Items Grade* Standard Limit

Grade No. 1 97.980 - 97.990 (3.8575 - 3.8579) —
Piston skirt diameter “A” Grade No. 2 97.990 - 98.000 (3.8579 - 3.8583) —
Grade No. 3 98.000 - 98.010 (3.8583 - 3.8587) —
“H” dimension 39 (1.54) —
Piston pin hole diameter Grade No. 0 21.993 - 21.999 (0.8659 - 0.8661) —
Piston to cylinder bore clearance 0.010 - 0.030 (0.0004 - 0.0012) 0.08 (0.0031)
*: Always check with the Parts Department for the latest parts information

Piston Ring
Unit: mm (in)

Items Standard Limit

Top 0.035 - 0.085 (0.0014 - 0.0033) 0.11 (0.0043)
Side clearance 2nd 0.030 - 0.070 (0.0012 - 0.0028) 0.10 (0.0039)
Oil ring 0.015 - 0.185 (0.0006 - 0.0073) —
Top 0.23 - 0.33 (0.0091 - 0.0130) 0.56 (0.0220)
End gap 2nd 0.25 - 0.40 (0.0098 - 0.0157) 0.52 (0.0205)
Oil ring 0.20 - 0.60 (0.0079 - 0.0236) 0.96 (0.0378)

Piston Pin
Unit: mm (in)

Items Grade* Standard

Piston pin diameter Grade No. 0 21.989 - 21.995 (0.8657 - 0.8659)
Piston to piston pin clearance 0.002 - 0.006 (0.0001 - 0.0002)
Connecting rod bushing oil clearance 0.005 - 0.017 (0.0002 - 0.0007)
*: Always check with the Parts Department for the latest parts information

CONNECTING ROD
Unit: mm (in)

Items Grade1 Standard Limit

Center distance 154.45 - 154.55 (6.08 - 6.08) —
Bend [per 100 (3.94)] — 0.15 (0.0059)
Torsion [per 100 (3.94)] — 0.30 (0.0118)
2
Connecting rod bushing inside diameter Grade No. 0 22.000 - 22.006 (0.8661 - 0.8664) —
(small end)
Connecting rod big end inside diameter (without bearing) 57.000 - 57.013 (2.2441 - 2.2446) —

Revision: July 2009 EM-250 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Side clearance 0.20 - 0.40 (0.0079 - 0.0157) 0.40 (0.0157)
A
Grade No. 0 57.000 - 57.001 (2.2441 - 2.2441)
Grade No. 1 57.001 - 57.002 (2.2441 - 2.2442)
Grade No. 2 57.002 - 57.003 (2.2442 - 2.2442)
Grade No. 3 57.003 - 57.004 (2.2442 - 2.2443) EM
Grade No. 4 57.004 - 57.005 (2.2443 - 2.2443)
Grade No. 5 57.005 - 57.006 (2.2443 - 2.2443)
Connecting rod bearing housing Grade No. 6 57.006 - 57.007 (2.2443 - 2.2444)
Grade No. 7 57.007 - 57.008 (2.2444 - 2.2444) C
Grade No. 8 57.008 - 57.009 (2.2444 - 2.2444)
Grade No. 9 57.009 - 57.010 (2.2444 - 2.2445)
Grade No. A 57.010 - 57.011 (2.2445 - 2.2445)
Grade No. B 57.011 - 57.012 (2.2445 - 2.2446) D
Grade No. C 57.012 - 57.013 (2.2446 - 2.2446)
1
: Always check with the Parts Department for the latest parts information
2: E
After installing in connecting rod

CRANKSHAFT
Unit: mm (in) F

SEM645 PBIC1686E

Grade1 Dimension J

Grade No. G 63.963 - 63.964 (2.5182 - 2.5183)

Grade No. H 63.962 - 63.963 (2.5182 - 2.5182)
Grade No. J 63.961 - 63.962 (2.5181 - 2.5182) K
Grade No. K 63.960 - 63.961 (2.5181 - 2.5181)
Grade No. L 63.959 - 63.960 (2.5181 - 2.5181)
Grade No. M 63.958 - 63.959 (2.5180 - 2.5181)
Grade No. N 63.957 - 63.958 (2.5180 - 2.5180) L
Grade No. P 63.956 - 63.957 (2.5179 - 2.5180)
Grade No. R 63.955 - 63.956 (2.5179 - 2.5179)
Grade No. S 63.954 - 63.955 (2.5179 - 2.5179)
M
Grade No. T 63.953 - 63.954 (2.5178 - 2.5179)
Main journal dia. “Dm” grade (No. 1 and 5) Standard Grade No. U 63.952 - 63.953 (2.5178 - 2.5178)
Grade No. V 63.951 - 63.952 (2.5178 - 2.5178)
Grade No. W 63.950 - 63.951 (2.5177 - 2.5178) N
Grade No. X 63.949 - 63.950 (2.5177 - 2.5177)
Grade No. Y 63.948 - 63.949 (2.5176 - 2.5177)
Grade No. 1 63.947 - 63.948 (2.5176 - 2.5176)
Grade No. 2 63.946 - 63.947 (2.5176 - 2.5176) O
Grade No. 3 63.945 - 63.946 (2.5175 - 2.5176)
Grade No. 4 63.944 - 63.945 (2.5175 - 2.5175)
Grade No. 5 63.943 - 63.944 (2.5174 - 2.5175)
Grade No. 6 63.942 - 63.943 (2.5174 - 2.5174) P
Grade No. 7 63.941 - 63.942 (2.5174 - 2.5174)
Grade No. 9 63.940 - 63.941 (2.5173 - 2.5174)

Revision: July 2009 EM-251 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Grade No. A 63.963 - 63.964 (2.5182 - 2.5183)
Grade No. B 63.962 - 63.963 (2.5182 - 2.5182)
Grade No. C 63.961 - 63.962 (2.5181 - 2.5182)
Grade No. D 63.960 - 63.961 (2.5181 - 2.5181)
Grade No. E 63.959 - 63.960 (2.5181 - 2.5181)
Grade No. F 63.958 - 63.959 (2.5180 - 2.5181)
Grade No. G 63.957 - 63.958 (2.5180 - 2.5180)
Grade No. H 63.956 - 63.957 (2.5179 - 2.5180)
Grade No. J 63.955 - 63.956 (2.5179 - 2.5179)
Grade No. K 63.954 - 63.955 (2.5179 - 2.5179)
Grade No. L 63.953 - 63.954 (2.5178 - 2.5179)
Grade No. M 63.952 - 63.953 (2.5178 - 2.5178)
Main journal dia. “Dm” grade (No. 2, 3 and 4) Standard
Grade No. N 63.951 - 63.952 (2.5178 - 2.5178)
Grade No. P 63.950 - 63.951 (2.5177 - 2.5178)
Grade No. R 63.949 - 63.950 (2.5177 - 2.5177)
Grade No. S 63.948 - 63.949 (2.5176 - 2.5177)
Grade No. T 63.947 - 63.948 (2.5176 - 2.5176)
Grade No. U 63.946 - 63.947 (2.5176 - 2.5176)
Grade No. V 63.945 - 63.946 (2.5175 - 2.5176)
Grade No. W 63.944 - 63.945 (2.5175 - 2.5175)
Grade No. X 63.943 - 63.944 (2.5174 - 2.5175)
Grade No. Y 63.942 - 63.943 (2.5174 - 2.5174)
Grade No. 1 63.941 - 63.942 (2.5174 - 2.5174)
Grade No. 2 63.940 - 63.941 (2.5173 - 2.5174)
Grade No. 0 53.968 - 53.974 (2.1247 - 2.1250)
Pin journal dia. “Dp” Standard Grade No. 1 53.962 - 53.968 (2.1245 - 2.1247)
Grade No. 2 53.956 - 53.962 (2.1243 - 2.1245)
Center distance “r” 45.96 - 46.04 (1.8094 - 1.8126)
Out-of-round (Difference between ″X″ and ″Y″) 0.002 (0.0001)
Taper (Difference between ″A″ and ″B″) Limit 0.002 (0.0001)
2 Less than 0.05 (0.002)
Runout [TIR ]
Standard 0.10 - 0.26 (0.0039 - 0.0102)
Crankshaft end play
Limit 0.30 (0.0118)
1: Always check with the Parts Department for the latest parts information
2
: Total indicator reading

MAIN BEARING
Unit: mm (in)

PBIC0189E

Grade number* UPR/LWR Thickness Identification color Remarks

Revision: July 2009 EM-252 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
0 — 2.483 - 2.486 (0.0978 - 0.0979) Black
A
1 — 2.486 - 2.489 (0.0979 - 0.0980) Brown
2 — 2.489 - 2.492 (0.0980 - 0.0981) Green
3 — 2.492 - 2.495 (0.0981 - 0.0982) Yellow EM
Grade is the same for upper
4 — 2.495 - 2.498 (0.0982 - 0.0983) Blue
and lower bearings
5 — 2.498 - 2.501 (0.0983 - 0.0985) Pink
6 — 2.501 - 2.504 (0.0985 - 0.0986) Purple C
7 — 2.504 - 2.507 (0.0986 - 0.0987) White
8 — 2.507 - 2.510 (0.0987 - 0.0988) Red
D
UPR 2.483 - 2.486 (0.0978 - 0.0979) Black
01
LWR 2.486 - 2.489 (0.0979 - 0.0980) Brown
UPR 2.486 - 2.489 (0.0979 - 0.0980) Brown E
12
LWR 2.489 - 2.492 (0.0980 - 0.0981) Green
UPR 2.489 - 2.492 (0.0980 - 0.0981) Green
23 F
LWR 2.492 - 2.495 (0.0981 - 0.0982) Yellow
UPR 2.492 - 2.495 (0.0981 - 0.0982) Yellow
34
LWR 2.495 - 2.498 (0.0982 - 0.0983) Blue Grade is different for upper and G
UPR 2.495 - 2.498 (0.0982 - 0.0983) Blue lower bearings.
45
LWR 2.498 - 2.501 (0.0983 - 0.0985) Pink
H
UPR 2.498 - 2.501 (0.0983 - 0.0985) Pink
56
LWR 2.501 - 2.504 (0.0985 - 0.0986) Purple
UPR 2.501 - 2.504 (0.0985 - 0.0986) Purple I
67
LWR 2.504 - 2.507 (0.0986 - 0.0987) White
UPR 2.504 - 2.507 (0.0986 - 0.0987) White
78 J
LWR 2.507 - 2.510 (0.0987 - 0.0988) Red
*: Always check with the Parts Department for the latest parts information

Undersize K
Unit: mm (in)

Undersize Thickness Main journal diameter

0.25 (0.0098) 2.618 - 2.626 (0.1031 - 0.1034) Grind so that bearing clearance is the specified value. L

Main Bearing Oil Clearance

Unit: mm (in)
M
Items Standard Limit
No.1 and 5 0.001 - 0.011 (0.00004 - 0.0004) 0.021 (0.0008)
Main bearing oil clearance
No.2, 3 and 4 0.007 - 0.017 (0.0003 - 0.0007) 0.027 (0.0011) N

Connecting Rod Bearing

O
Grade number* Thickness “T” mm (in) Identification color (mark)
0 1.500 - 1.503 (0.0591 - 0.0592) Black
1 1.503 - 1.506 (0.0592 - 0.0593) Brown P
2 1.506 - 1.509 (0.0593 - 0.0594) Green
3 1.509 - 1.512 (0.0594 - 0.0595) Yellow
*: Always check with the Parts Department for the latest parts information

Undersize

Revision: July 2009 EM-253 2010 Pathfinder

 SERVICE DATA AND SPECIFICATIONS (SDS)
< SERVICE DATA AND SPECIFICATIONS (SDS) [VK56DE]
Unit: mm (in)

Undersize Thickness Crank pin journal diameter “Dp”

0.25 (0.0098) 1.627 - 1.635 (0.0641 - 0.0644) Grind so that bearing clearance is the specified value.

Connecting Rod Bearing Oil Clearance

Unit: mm (in)

Items Standard Limit

Connecting rod bearing oil clearance 0.020 - 0.039 (0.0008 - 0.0015) 0.055 (0.0022)

Revision: July 2009 EM-254 2010 Pathfinder