Hummer H2. Manual — part 1878

Fig. 664: Engine Valley Cover & Gasket
Courtesy of GENERAL MOTORS CORP.

2. Install the valley cover and NEW gasket.

3. Install the valley cover bolts.

Tighten: Tighten the valley cover bolts to 25 N.m (18 lb ft).

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 665: Knock Sensors
Courtesy of GENERAL MOTORS CORP.

4. Install the knock sensors.

Tighten: Tighten the knock sensors to 20 N.m (15 lb ft).

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 666: Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.

5. Install the knock sensor wire harness.

COOLANT AIR BLEED PIPE INSTALLATION

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 667: View Of Pipe & Cover Gasket
Courtesy of GENERAL MOTORS CORP.

1. Install the gaskets onto the engine coolant air bleed pipe and covers.

IMPORTANT:

z

Install the pipe gaskets properly onto the pipe and covers.

z

Position the gasket O-ring seal onto the nipple portion of the pipe.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2