Scribd
Upload
573 views1 page

Cummins B Series Torque Specs Guide

This document provides torque and rebuild specifications for Cummins B Series four and six cylinder engines used in industrial and generator applications. It includes specifications for tightening the rocker cover, cylinder head bolts, main bearing caps, piston protrusion, connecting rod bolts, cylinder bore measurements, valve clearances, and valve adjustment sequence.

Uploaded by

X'mix Đreamer
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
573 views1 page

Cummins B Series Torque Specs Guide

This document provides torque and rebuild specifications for Cummins B Series four and six cylinder engines used in industrial and generator applications. It includes specifications for tightening the rocker cover, cylinder head bolts, main bearing caps, piston protrusion, connecting rod bolts, cylinder bore measurements, valve clearances, and valve adjustment sequence.

Uploaded by

X'mix Đreamer
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 1

Torque and Rebuild Specifications for Cummins Four and Six Cylinder B Series

Engines in Industrial and Generator Applications with Front Gear Trains

Rocker Cover 18 ft. lbs.

Cylinder Head Bolts

Tighten all to 66ft. lb. in sequence


Tighten Long Bolts(4,5,12,13 on 4B;
4,5,12,13,20,21 on 6B) to 89ft. lb.
Tighten Short Bolts
(All others not noted above) to 66 ft. lb.
Tighten All Long Bolts again to 89ft. lb.
Tighten all in sequence 90 Degrees

37ft. lbs. 44ft. lbs. 66ft. lbs. +90°


Main Bearing Cap Torque
Starting at center main cap and work outwards.
Piston Protrusion 0.024” – 0.028”
Connecting Rod Bolt 22ft. lbs. 44ft. lbs. +60°
Standard Cylinder Bore 4.0161” – 4.0177”
Cylinder Bore Out-of-round 0.0015” Max
Cylinder Bore Taper 0.003” Max
Piston Skirt to Liner Clearance 0.0048” – 0.0089”
Crankshaft End Play 0.004” – 0.017”
Valve Adjust Sequence Cyl 1 Cyl 2 Cyl 3 Cyl 4 Cyl 5 Cyl 6
I E I E I E I E I E I E
TDC #1 X X X X X X
TDC #6 X X X X X X
0.010” Intake
Valve Clearance (set cold)
0.020” Exhaust

You might also like