Hummer H3. Manual — part 346

Fig. 235: View Of Balance Shafts
Courtesy of GENERAL MOTORS CORP.

2. Remove the right balance shaft.

Installation Procedure

IMPORTANT:

Do not disassemble the balance shaft. Remove and
install the balance shaft as a complete assembly.

Rotate the balance shaft to check for free rotation. If the
balance shaft does not turn free, inspect the balance
shaft bearings and bearing surface for damage.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 236: View Of Balance Shafts
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the balance shaft bearing journals with clean engine oil.

2. Install the right balance shaft assembly with the counterweight down to prevent damage to

the balance shaft bearings.

3. Install the balance shaft drive chain. Refer to Balance Shaft Drive Chain Replacement.

BALANCE SHAFT CHAIN GUIDE REPLACEMENT

Removal Procedure

1. Remove the balance shaft drive chain. Refer to Balance Shaft Drive Chain Replacement.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 237: View Of Balance Shaft Chain Guide
Courtesy of GENERAL MOTORS CORP.

2. Remove the balance shaft chain guide bolts.

3. Remove the balance shaft chain guide.

Installation Procedure

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 238: View Of Balance Shaft Chain Guide
Courtesy of GENERAL MOTORS CORP.

1. Install the balance shaft chain guide.

2. Install the balance shaft chain guide bolts.

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

3. Install the balance shaft drive chain. Refer to Balance Shaft Drive Chain Replacement.

NOTE:

Refer to Fastener Notice .

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3