Hummer H3. Manual — part 140

Courtesy of GENERAL MOTORS CORP.

2. Rotate the crankshaft until the correct timing chain and timing marks align:

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.

IMPORTANT: Every 11 crankshaft rotations, 3 of the 5 dark links on the

timing chain will line up with the timing marks.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 204: View Of Balance Shaft Chain Tensioner
Courtesy of GENERAL MOTORS CORP.

3. Remove the balance shaft chain tensioner bolts.

4. Remove the balance shaft chain tensioner.

Installation Procedure

Fig. 205: View Of Primary Camshaft Drive Chain Tensioner Shoe & Ratchet Lever
Courtesy of GENERAL MOTORS CORP.

1. 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.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

2. Slowly release the pressure on the shoe, until the ratchet lever moves to the first detent and a

"click" is heard and felt.

Fig. 206: Locking Primary Camshaft Drive Chain Tensioner Shoe Into Collapsed
Position
Courtesy of GENERAL MOTORS CORP.

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

collapsed position.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 207: View Of Balance Shaft Chain Tensioner
Courtesy of GENERAL MOTORS CORP.

4. Install the balance shaft chain tensioner and bolts.

Tighten: Tighten the bolts to 10 N.m (89 lb in).

5. Remove the pin holding the tensioner to tighten any slack in the balance shaft drive chain.

NOTE:

Refer to Fastener Notice in Cautions and Notices.

IMPORTANT: Ensure the tensioner release lever is facing outward.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3