Hummer H3. Manual — part 141

Fig. 208: View Of Sprocket Timing Marks
Courtesy of GENERAL MOTORS CORP.

6. 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.

7. Install the crankshaft rear oil seal housing. Refer to Crankshaft Rear Oil Seal and

Housing Replacement.

BALANCE SHAFT DRIVE CHAIN REPLACEMENT

Removal Procedure

2006 Hummer H3

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

1. Remove the balance shaft chain tensioner. Refer to Balance Shaft Chain Tensioner

Replacement.

Fig. 209: View Of Balance Shaft Drive Chain
Courtesy of GENERAL MOTORS CORP.

2. Remove the balance shaft drive chain from the following:

1. The crankshaft sprocket

2. The left balance sprocket

3. The right balance sprocket

Installation Procedure

2006 Hummer H3

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

Fig. 210: View Of Balance Shaft Drive Chain
Courtesy of GENERAL MOTORS CORP.

1. Install the balance shaft drive chain to the following:

1. The left balance sprocket

2. The right balance sprocket

3. The crankshaft sprocket

IMPORTANT: Ensure the darkened links are facing outward.

2006 Hummer H3

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

Fig. 211: View Of Sprocket Timing Marks
Courtesy of GENERAL MOTORS CORP.

2. 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.

3. Install the balance shaft chain tensioner. Refer to Balance Shaft Chain Tensioner

Replacement.

BALANCE SHAFT REPLACEMENT-LEFT

Removal Procedure

2006 Hummer H3

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