Installation Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Primary Camshaft Drive Chain Tensioner Shoe & Ratchet Lever

Courtesy of GENERAL MOTORS CORP.

Collapse the primary camshaft drive chain tensioner using the following procedure:
1. Rotate the ratchet release lever (2) clockwise 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 Primary Camshaft Drive Chain Tensioner Shoe Into 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: Identifying Primary Camshaft Drive Chain Tensioner to Engine Block Bolts

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE .

IMPORTANT: Ensure the tensioner release lever is facing outward.

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

Fig 4: Identifying Primary Timing Gear Alignment Marks

Courtesy of GENERAL MOTORS CORP.

Ensure the primary timing marks (1) are aligned vertically.
Install the engine front cover. Refer to Engine Front Cover Replacement .