Crankshaft Balancer Installation

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Tools Required

J 45059 Angle Meter. See Special Tools and Equipment .
J 41478 Crankshaft Front Oil Seal Installer. See Special Tools and Equipment .

Fig 1: Installing Crankshaft Balancer

Courtesy of GENERAL MOTORS CORP.

Install the crankshaft balancer using J 41478 . See Special Tools and Equipment .
Remove J 41478 . See Special Tools and Equipment .
Hold the flywheel or back of the crankshaft. The crankshaft balancer does not have a keyway so the crankshaft could turn when tightening, causing an improper torque.

Fig 2: View Of Crankshaft Balancer Bolt

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: Be sure the crankshaft balancer friction washer, GM P/N 12573950, was installed prior to the engine front cover installation.

Install the crankshaft balancer washer and new bolt.
Tighten:
1. Tighten the new crankshaft balancer bolt while holding the back to 150 N.m (110 lb ft).
2. Use J 45059 to tighten the crankshaft balancer bolt an additional 180 degrees. See Special Tools and Equipment .