Installation Procedure

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

Fig 1: Collapsing Secondary Camshaft Chain Tensioner

Courtesy of GENERAL MOTORS CORP.

Collapse the left secondary camshaft chain tensioner using the following procedure:
1. Rotate the ratchet release lever (2) counterclockwise and hold.
2. Collapse the tensioner shoe (1) and hold.
3. Release the ratchet lever (2).
Slowly release the pressure on the shoe (1), until the ratchet lever (2) moves to the first detent and a "click" is heard and felt.
Collapse the tensioner shoe (1) and hold.

Fig 2: Locking Tensioner Shoe In Collapsed Position

Courtesy of GENERAL MOTORS CORP.

Insert a pin through the hole in the release lever in order to lock the tensioner shoe in the collapsed position.

Fig 3: Left Secondary Timing Chain Tensioner & Bolts

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Fastener Caution .

NOTE: Ensure the tensioner release lever is facing outward.

Install the left secondary camshaft drive chain tensioner and retaining bolts and tighten to 25 N.m (18 lb ft).
Remove the pin holding the tensioner to tighten any slack in the timing chain.

Fig 4: Aligning Paint Marks With Actuator Timing Marks

Courtesy of GENERAL MOTORS CORP.

Inspect the two paint marks created previously to ensure they remain aligned with the timing marks (1, 2) on the actuator.
Install the engine oil pump. Refer to Oil Pump Replacement .

Fig 5: Camshaft Holding Tool

Courtesy of GENERAL MOTORS CORP.