87. Engine Flywheel Installation

Engine Flywheel Installation





Important:
^ The flex plate does not use a locating pin for alignment, and will not initially seat against the crankshaft flange or spacer, if applicable, but will be pulled onto the crankshaft by the bolts. This procedure requires a 3 stage tightening process.

^ Certain applications, the 4.8L manual transmission and all 6.0L, require a spacer and longer bolts for proper flex plate position.

Install the spacer, if applicable, onto the rear of the crankshaft.
A longer flex plate bolt must be used on applications using a flex plate spacer.




1. Install the automatic transmission flex plate to the crankshaft, if applicable.

Important: A longer bolt must be used on applications using a spacer.

2. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the threads of the bolts.





Notice: Refer to Fastener Notice in Service Precautions.

3. Install the bolts.
1. Tighten the bolts (1-6) a first pass in sequence to 20 N.m (15 lb ft).
2. Tighten the bolts (1-6) a second pass in sequence to 50 N.m (37 lb ft).
3. Tighten the bolts (1-6) a final pass in sequence to 100 N.m (74 lb ft).