6.7L Cummins Mounting Adaptations – Flywheel Housing – Clean and Inspect for Reuse

Use steam or solvent to clean the flywheel housing.
Dry with compressed air.

Inspect the flywheel housing for cracks, especially in the area of the flywheel housing that mounts to the cylinder
block or rear gear housing.

Inspect the flywheel housing transmission/drive unit mounting surface for cracks.
Also inspect for damaged threads commonly caused by cross-threaded cap screws or installing an incorrect
cap screw.
NOTE: Helicoils are available to repair damaged threads.

Rear Gear Train
Inspect the rear face of the gear housing and flywheel housing mounting surface for cleanliness and raised nicks
or burrs.
Use fine crocus cloth to remove small nicks and burrs.
Thoroughly clean the flywheel housing and gear housing mating surfaces. These surfaces must be clean of oil and
debris.