Crankshaft Balancer Installation

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 36660-A Torque Angle Meter
J 41478 Crankshaft Front Oil Seal Installer

Install the crankshaft balancer using J 41478 .
Remove J 41478 .
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 1: Installing Crankshaft Balancer
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. 4.1. Tighten the new crankshaft balancer bolt while holding the back to 150 N.m (110 lb ft).
2. 4.2. Use J 36660-A to tighten the crankshaft balancer bolt an additional 180 degrees.
  
  Fig 2: Installing Crankshaft Balancer Washer And New Bolt
  Courtesy of GENERAL MOTORS CORP.