Flywheel: Service and Repair

Engine Flywheel Replacement

^ Tools Required
- J36660-A Torque Angle Meter
- J38122-A Harmonic Balancer Holder

Removal Procedure

Important: You may be required to remove the chamfer from the edge of an 18-mm socket in order to obtain a full socket engagement on the thin headed flywheel bolts.

You cannot balance the flywheel to the engine by rotating the flywheel, because the flywheel can only be installed on the crankshaft one way.





1. Remove the transmission assembly.
2. Remove clutch assembly.
3. Remove the flywheel attaching bolt while using J38122-A. This will prevent crankshaft rotation.
4. Remove the flywheel and retainer.
5. Thoroughly remove the thread adhesive from the following locations:
^ The flywheel
^ The bolts
^ The crankshaft threaded holes

Installation Procedure
1. Install new bolts or apply adhesive/sealant compound GM P/N 123454493 or equivalent to the bolts which you are reusing.
2. Install the flywheel and the attaching bolts.





3. While holding the crankshaft balancer with J38122-A, tighten the bolts evenly.
Tighten bolts to 30 Nm (22 ft. lbs.), + 45 degrees using J36660-A.
4. Install clutch assembly.
5. Install the transmission assembly.