Chevrolet Silverado / GMC Sierra. Manual - part 451
1. Remove the upper right valve rocker arm cover. Refer to Valve Rocker Arm Cover
Replacement - Upper Right Side.
2. Remove the fuel injectors. Refer to Fuel Injector Replacement (Left) or Fuel Injector
Replacement (Right) .
3. Remove the lower valve rocker arm cover bolts.
4. Remove the lower valve rocker arm cover.
5. Remove the gasket from the lower valve rocker arm cover.
6. Inspect the lower valve rocker arm cover gasket for damage, replace if necessary. Otherwise
reuse the old gasket.
7. If required, clean and inspect the lower valve rocker arm cover. Refer to Valve Rocker
Arm Cover Cleaning and Inspection - Lower .
Installation Procedure
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 127: View Of Lower Valve Rocker Arm Cover (Right)
Courtesy of GENERAL MOTORS CORP.
1. Install the lower valve rocker arm cover gasket.
2. Install the lower valve rocker arm cover.
3. Install the lower valve rocker arm cover bolts.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 128: Lower Valve Rocker Arm Cover Bolts Tightening Sequence
Courtesy of GENERAL MOTORS CORP.
4. Tighten the bolts in the sequence shown.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
5. Install the fuel injectors. Refer to Fuel Injector Replacement (Left) or Fuel Injector
Replacement (Right) .
6. Install the right upper valve rocker arm cover. Refer to Valve Rocker Arm Cover
Replacement - Upper Right Side.
VALVE ROCKER ARM, SHAFT, AND PUSH ROD REPLACEMENT
Removal Procedure
NOTE:
Refer to Fastener Notice .
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 129: View Of Valve Clearance Adjusting Screw
Courtesy of GENERAL MOTORS CORP.
1. Remove the lower valve rocker arm covers. Refer to Valve Rocker Arm Cover
Replacement - Lower Left Side or Valve Rocker Arm Cover Replacement - Lower
Right Side.
2. Loosen the valve clearance lock nuts on each rocker arm.
3. Loosen the valve clearance adjusting screw on each rocker arm in order to relieve tension
on the valvetrain.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado