Hummer H2. Manual — part 1717

Fig. 72: Knock Sensor Oil Seals & Cover
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the NEW knock sensor seals (1) with clean engine oil.

2. Install the knock sensor oil seals (1) into the engine valley cover (2).

2004 Hummer H2

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

Fig. 73: Engine Valley Cover & Gasket
Courtesy of GENERAL MOTORS CORP.

3. Install the engine valley cover and a NEW gasket onto the engine block.

4. Install the engine valley cover bolts.

Tighten: Tighten the 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. 74: Knock Sensors
Courtesy of GENERAL MOTORS CORP.

5. Install the knock sensors.

Tighten: Tighten the 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. 75: Knock Sensor Wire Harness
Courtesy of GENERAL MOTORS CORP.

6. Connect the knock sensor electrical connectors.

7. Push down on the rubber covers.

8. Install the intake manifold. Refer to Intake Manifold Replacement .

VALVE ROCKER ARM COVER REPLACEMENT - LEFT

Removal Procedure

2004 Hummer H2

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