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