Chevrolet Silverado / GMC Sierra. Service manual — part 571

Fig. 170: View Of Engine Block Heater
Courtesy of GENERAL MOTORS CORP.

26. Install a new O-ring to the block heater.

27. Lubricate the O-ring with engine coolant.

28. Install the engine block heater.

UPPER OIL PAN CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 171: View Of Upper Oil Pan
Courtesy of GENERAL MOTORS CORP.

1. Clean the upper oil pan.

2. Carefully clean the sealer from the threaded holes.

3. Inspect the upper oil pan for cracks.

4. Inspect the upper oil pan sealing surfaces for damage.

5. Replace the upper oil pan if any damage is found.

CAMSHAFT AND BEARINGS CLEANING AND INSPECTION

Tools Required

J 7872 Dial Indicator Set

Inspection

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 172: View Of Camshaft Inspection Areas
Courtesy of GENERAL MOTORS CORP.

1. Clean the camshaft.

2. Visually inspect the camshaft bearings in the engine block for the following conditions:

Scoring

Nicks

Damage caused by lack of lubrication

Misaligned oil feed holes

IMPORTANT: The camshaft bearings are not serviceable. If the camshaft

bearings are damaged, the engine must be replaced.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 173: Measuring Camshaft Journal Diameter
Courtesy of GENERAL MOTORS CORP.

3. Measure the camshaft journal diameter.

The production value is 60.932-60.962 mm (2.3990-2.4001 in) and service limit is
60.920 mm (2.3984 in).

Replace the camshaft if the measured value is less than service limit.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado