Chevrolet Silverado / GMC Sierra. Manual — part 486
Fig. 249: Locking Flywheel Using J 44643
Courtesy of GENERAL MOTORS CORP.
1. Remove the valve lifters. Refer to Valve Lifter Replacement.
2. Remove the charged air cooler. Refer to Charge Air Cooler Replacement .
3. Remove the air conditioning (A/C) condenser. Refer to Condenser Replacement .
4. Remove the starter. Refer to Starter Motor Replacement (6.6L) .
5. Install J 44643 flush to the flywheel opening. See Special Tools .
6. Remove the engine front cover. Refer to Engine Front Cover Replacement.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 250: View Of Oil Pump Driven Gear & Nut
Courtesy of GENERAL MOTORS CORP.
7. Remove the oil pump driven gear nut.
8. Remove the oil pump driven gear.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 251: View Of Oil Pump Drive Gear
Courtesy of GENERAL MOTORS CORP.
9. Remove the oil pump drive gear and crankshaft reluctor.
Do not remove the crankshaft reluctor bolts.
Do not damage the reluctor teeth.
IMPORTANT: The crankshaft reluctor and the oil pump drive gear are timed
together at the factory. Do not remove the crankshaft reluctor
from the oil pump drive gear.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 252: Measuring Camshaft End Play Using J 26900-12 & J 26900-13
Courtesy of GENERAL MOTORS CORP.
10. Using J 26900-12 (1) and J 26900-13 (2), measure the camshaft end play. See Special
Tools .
The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20
mm (0.008 in).
Replace the camshaft gear or the camshaft thrust plate if measured value exceeds
service limit.
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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