Chevrolet Silverado / GMC Sierra. Manual — part 2147

1. Clean the cover in solvent. Remove the sealant from the cover oil pan surface. Refer to

Replacing Engine Gaskets .

2. Dry the cover with compressed air.

3. Inspect the gasket sealing surfaces (1, 4) for excessive scratches or gouging.

4. Inspect the threaded bolt holes (2, 3) for damaged threads or debris.

CRANKSHAFT REAR OIL SEAL HOUSING CLEANING AND INSPECTION

Do not use the front cover-to-engine block gasket again.
Install a NEW gasket during assembly.

Do not use the camshaft position (CMP) actuator magnet
gasket again. Install a NEW gasket during assembly.

CAUTION: Refer to Safety Glasses and Compressed Air Caution .

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. 114: Crankshaft Rear Oil Seal & Housing
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

Do not use the crankshaft rear oil seal again. Install a
NEW crankshaft oil seal during assembly.

Do not use the rear housing-to-engine block gasket
again. Install a NEW gasket during assembly.

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

1. Remove the crankshaft oil seal (141) from the rear housing.

2. Clean the housing in solvent. Remove the sealant from the housing oil pan surface. Refer to

Replacing Engine Gaskets .

3. Dry the housing with compressed air.

4. Inspect the gasket sealing surfaces for excessive scratches or gouging.

5. Inspect the housing-to-oil pan threaded bolt holes for damaged threads or debris.

6. Inspect the crankshaft oil seal mounting bore for damage.

ENGINE BLOCK VALLEY COVER CLEANING AND INSPECTION

Fig. 115: View Of Engine Valley Cover

CAUTION: Refer to Safety Glasses Caution .

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

Courtesy of GENERAL MOTORS CORP.

1. Clean the valley cover in solvent.

2. Dry with compressed air.

3. Inspect for damaged threads (1) and damaged sealing surfaces (2).

VALVE LIFTER OIL MANIFOLD CLEANING AND INSPECTION

CAUTION: Refer to Safety Glasses Caution .

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