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Chevrolet Silverado / GMC Sierra. Manual - part 2197
Fig. 43: View Of Rocker Arms & Bolts
Courtesy of GENERAL MOTORS CORP.
5. Install the rocker arms and bolts.
IMPORTANT:
Ensure the pushrods seat properly to the ends of the
rocker arms.
DO NOT tighten the rocker arm bolts at this time.
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. 44: View Of Camshaft & Crankshaft Sprocket Alignment Marks In 12 O'clock
Position
Courtesy of GENERAL MOTORS CORP.
6. Rotate the crankshaft until number 1 piston is at top dead center of compression stroke.
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
In this position, cylinder number 1 rocker arms will be off lobe lift, and the crankshaft
sprocket key will be at the 1:30 position. The camshaft and crankshaft sprocket alignment
marks (1, 2) will be in the 12 o'clock position. If viewing from the rear of the engine, the
additional crankshaft pilot hole, non-threaded, will be in the 10:30 position.
The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3.
Cylinders 1, 3, 5 and 7 are left bank.
Cylinders 2, 4, 6, and 8 are right bank.
7. With the engine in the number 1 firing position, tighten the following valve rocker arm
bolts:
Tighten:
Tighten the exhaust valve rocker arm bolts 1, 2, 7, and 8 to 30 N.m (22 lb ft).
Tighten the intake valve rocker arm bolts 1, 3, 4, and 5 to 30 N.m (22 lb ft).
8. Rotate the crankshaft 360 degrees.
9. Tighten the following valve rocker arm bolts:
Tighten:
Tighten the exhaust valve rocker arm bolts 3, 4, 5, and 6 to 30 N.m (22 lb ft).
Tighten the intake valve rocker arm bolts 2, 6, 7, and 8 to 30 N.m (22 lb ft).
VALVE ROCKER ARM AND PUSH ROD INSTALLATION (RPO L92/LY6/L76)
NOTE:
Refer to Fastener Notice .
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. 45: 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.
3. Install the valve rocker arm pivot support.
IMPORTANT:
When using the valve train components again, always
install the components to the original location and
position.
Valve lash is net build. No valve adjustment is required.
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
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