Chevrolet Silverado / GMC Sierra. Service manual — part 261

VALVE ROCKER ARM AND PUSH ROD REPLACEMENT

Removal Procedure

Fig. 93: View Of Rocker Arms & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement -

Left Side or Valve Rocker Arm Cover Replacement - Right Side.

IMPORTANT: Place the valve rocker arms, pushrods, and pivot support, in

a rack so that the can be installed in the same location from
which they were removed.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

2. Remove the valve rocker arm bolts.

3. Remove the valve rocker arms.

Fig. 94: View Of Valve Rocker Arm Pivot Support
Courtesy of GENERAL MOTORS CORP.

4. Remove the valve rocker arm pivot support.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 95: 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 Rod Cleaning and Inspection.

Installation Procedure

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

components to the original location and position.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

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

Fig. 96: View Of 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.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2