Chevrolet Silverado / GMC Sierra. Manual — part 1971

Removal Procedure

Fig. 259: View Of Rocker Arms & Bolts
Courtesy of GENERAL MOTORS CORP.

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

Side or Valve Rocker Arm Cover Replacement - Right Side.

2. Remove the number one cylinder spark plug. Refer to Spark Plug Replacement .

IMPORTANT: The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3. Cylinders 1, 3, 5

and 7 are the left bank.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

3. Remove the rocker arm bolts.

4. Remove the rocker arms.

Fig. 260: View Of Valve Rocker Arm Pivot Support
Courtesy of GENERAL MOTORS CORP.

5. Remove the rocker arm pivot support.

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

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

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 261: View Of Pushrods
Courtesy of GENERAL MOTORS CORP.

6. Remove the pushrods.

7. Clean and inspect the rocker arms and pushrods, if required. 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 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

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

Fig. 262: View Of Valve Rocker Arm Pivot Support
Courtesy of GENERAL MOTORS CORP.

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

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

washer surface of the bolt that will contact the rocker arm.

3. Install the rocker arm pivot support.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado