Hummer H2. Manual - part 1723

Fig. 95: Valve Rocker Arm Pivot Support 
Courtesy of GENERAL MOTORS CORP. 

4. Remove the valve rocker arm pivot support. 

 

2004 Hummer H2 

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

  

Fig. 96: View Of Pushrods 
Courtesy of GENERAL MOTORS CORP. 

5. Remove the pushrods.  

6. Clean and inspect the valve rocker arms and pushrods. Refer to Valve Rocker Arm and Push Rods 

Cleaning and Inspection .  

Installation Procedure 

Valve lash is net build, no valve adjustment is required.

IMPORTANT: When reusing the valve train components, always install the components to the 

original location and position.

 

2004 Hummer H2 

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

  

Fig. 97: Valve Rocker Arm Pivot Support 
Courtesy of GENERAL MOTORS CORP. 

1. Lubricate the valve rocker arms and pushrods with clean engine oil.  

2. Lubricate the flange of the valve rocker arm bolts with clean engine oil. 

Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm. 

3. Install the valve rocker arm pivot support. 

 

2004 Hummer H2 

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

  

Fig. 98: View Of Pushrods 
Courtesy of GENERAL MOTORS CORP. 

4. Install the pushrods. 

IMPORTANT: Make sure that the pushrods seat properly to the valve lifter sockets.

 

2004 Hummer H2 

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