Removal Procedure

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

Upper Oil Pan Replacement - Remove
Rotate crankshaft to ensure that the balance shaft holes line up to install dowel to maintain timing.
Courtesy of GENERAL MOTORS COMPANY
NOTE:
- Install GM P/N 12628143 balancer shaft gear pin to the balancer shafts before removing the assembly to maintain timing and aid installation.
- If GM P/N 12628143 balancer shaft gear pin is not available, install a 4 - 5 mm dowel rod through the holes in both balancer shafts to maintain timing.
Install GM P/N 12628143 balancer shaft gear pin (1) on the balance shaft assembly.
Fig 1: Balance Shaft Assembly Bolt Removal Sequence
Courtesy of GENERAL MOTORS COMPANY

Remove the balance shaft assembly bolts in sequence shown.
Courtesy of GENERAL MOTORS COMPANY

Remove the balance shaft assembly bolts (1 - 3) and balance shaft assembly (4).

NOTE:

If reinstalling the balancer, clean and inspect as needed.