Removal Procedure

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

Remove the camshaft cover. Refer to Camshaft Cover Replacement .
Remove the timing chain. Refer to Camshaft Timing Chain and Tensioner Replacement .
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Remove the balancer chain tensioner bolt (1).
Remove the balancer chain tensioner (2).
Compress and lock the tensioner using EN-50837 retention tool.
1. Insert EN-50837 retention tool into the lever arm and push in a counterclockwise direction.
2. Compress the tensioner while holding lever arm.
3. Relax the force on the lever and tensioner slightly, allowing the tensioner to extend 3 ratchet clicks, and then hold in place.
4. Pull lever clockwise using EN-50837 retention tool until the hole in the lever aligns with the hole in the tensioner assembly. Push the point of EN-50837 retention tool through the lever and into the tensioner assembly.
Courtesy of GENERAL MOTORS COMPANY

Remove the balancer chain guide bolt (1).
Remove the balancer chain guide (2).
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NOTE:
The crankshaft balancer and the ORIGINAL balancer bolt will be temporarily installed in order to counter hold the crankshaft while removing the balancer shaft driven sprocket bolt.

TEMPORARILY install the crankshaft balancer (1).
1. TEMPORARILY install the ORIGINAL crankshaft balancer bolt (2).
2. Counter hold the crankshaft balancer pulley (1) using the EN-51577-1 Crankshaft Balancer Remover (3).
3. While counter holding, remove and DISCARD the balancer shaft driven sprocket bolt (4).
4. Remove the crankshaft balancer bolt (2), balancer (1) and tool (3).
Courtesy of GENERAL MOTORS COMPANY

Remove the crankshaft sprocket, balancer shaft driven sprocket, and balancer chain (1) simultaneously.