Engine Flywheel Installation

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: For manual transmission applications, note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. The engine flywheel must be reinstalled to the original position and direction. The engine flywheel will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a 3 stage tightening process. Refer to Engine Balancing .

Fig 1: View Of Manual Transmission Engine Flywheel

Courtesy of GENERAL MOTORS CORP.

Install the manual transmission engine flywheel to the crankshaft.
Align the mark or scribe on the crankshaft with the mark or scribe on the flywheel.

Fig 2: Identifying Flywheel Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

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

NOTE: Refer to Fastener Notice in Cautions and Notices.

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