Cummins M11 Engine Torque Specification Guide

Cummins M11 Engine Torque Specification Guide

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The Cummins M11 is a diesel engine widely used in heavy-duty trucks and industrial equipment.Proper torque specifications are critical to ensure engine reliability and performance. Below are the recommended torque values for key Cummins M11 components (exact values may vary slightly by model and year, please refer to the official manual for confirmation).

Major Bolt Torque Specifications
Cylinder head bolts
Initial torque: approximately 50 lb-ft (68 Nm)

Final Torque: Staged tightening to 200-220 lb-ft (271-298 Nm)

Sequence: Tighten in stages in a Cummins specified crossover pattern

Main Bearing Cap Bolts
Torque: approximately 250-280 lb-ft (339-380 Nm)

NOTE: Some models may require angular tightening (e.g., +90°).

Connecting rod bolts
Torque: approx. 100-120 lb-ft (136-163 Nm)

Some models require: tighten to 50 lb-ft, then rotate 60-90°.

Flywheel bolts
Torque: approx. 95-105 lb-ft (129-142 Nm)

Oil pan bolts
Torque: approx. 18-22 lb-ft (24-30 Nm)

Rocker arm bolts
Torque: approx. 45-55 lb-ft (61-75 Nm)

Caution
Use a calibrated torque wrench to ensure accuracy.

Clean threads and apply appropriate amount of lubricant (unless prohibited by specification).

Some bolts (such as cylinder head bolts) may need to be replaced and should not be reused.

Always refer to an official Cummins service manual, such as the Cummins M11 Service Manual, for the latest specifications.