Installation Procedure

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. 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 balance shaft 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.
Slowly release the pressure on the shoe, until the ratchet lever moves to the first detent and a "click" is heard and felt.

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: View Of Balance Shaft Chain Tensioner

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

IMPORTANT: Ensure the tensioner release lever is facing outward.

Install the balance shaft chain tensioner and bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
Remove the pin holding the tensioner to tighten any slack in the balance shaft drive chain.

Fig 4: View Of Sprocket Timing Marks

Courtesy of GENERAL MOTORS CORP.

Verify the correct timing chain and timing mark alignments:
- The left hand balance shaft sprocket timing mark (1) is at the 12:00 position
- The right hand balance shaft sprocket timing mark (2) is at the 2:30 position
- The crankshaft sprocket timing mark (3) is at the 4:30 position
- The 3 timing marks (1-3) on the sprockets line up with a dark link on the chain
Install the crankshaft rear oil seal housing. Refer to Crankshaft Rear Oil Seal and Housing Replacement .