84. Engine Flywheel Installation

Important: Note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment, and will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process.





1. Install the manual transmission engine flywheel to the crankshaft (if applicable).





2. Install the automatic transmission engine flywheel to the crankshaft (if applicable).
3. Apply Threadlock GM P/N 12345382 or equivalent to the threads of the flywheel bolts.

Notice: Refer to Fastener Notice in Service Precautions.





4. Install the engine flywheel bolts.
4.1. Tighten the engine flywheel bolts first pass in sequence to 20 Nm (15 ft. lbs.).
4.2. Tighten the engine flywheel bolts second pass in sequence to 50 Nm (37 ft. lbs.).
4.3. Tighten the engine flywheel bolts final pass in sequence to 100 Nm (74 ft. lbs.).