Hummer H3. Manual — part 450

Fig. 621: View Of Balance Shaft Chain Tensioner
Courtesy of GENERAL MOTORS CORP.

9. Install NEW right balance shaft assembly retaining bolts.

Tighten: Tighten the NEW right balance shaft assembly retaining bolts to 12 N.m (106 lb
in).

10. Install the balance shaft chain tensioner and bolts.

Tighten: Tighten the balance shaft chain tensioner bolts to 10 N.m (89 lb in).

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

11. Remove the small tool from the link plate hole in order to regain chain tension.

CYLINDER HEAD INSTALLATION

Tools Required

J 45059 Angle Meter. See Special Tools.

Installation Procedure

IMPORTANT: Do not force the tensioner to the next notch by pushing up on

the tensioner shoe. This will over-tension the chain and may
result in a whine noise.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 622: View Of Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

1. Install the dowel pins - cylinder head locator, if necessary.

2. Install a new cylinder head gasket.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3

Fig. 623: View Of Cylinder Head
Courtesy of GENERAL MOTORS CORP.

3. Install the cylinder head.

2007 Hummer H3

2007 ENGINE Engine Mechanical - 3.7L - H3