Chevrolet Silverado / GMC Sierra. Service manual — part 374

Tighten: Tighten the oil pump cover bolts to 12 N.m (106 lb in).

5. Install the relief valve (414).

6. Install the relief valve spring (415).

7. Install the relief valve plug (416).

Tighten: Tighten the relief valve plug to 12 N.m (106 lb in).

8. Inspect the oil pump for smooth operation by rotating the drive gear.

ENGINE FRONT COVER CLEANING AND INSPECTION

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 494: View Of Gasket Sealing Surfaces & Bolt Holes
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

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

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

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 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 495: 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 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2