Chevrolet Silverado / GMC Sierra. Service manual — part 375

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. 496: View Of Engine Valley Cover

CAUTION: Refer to Safety Glasses Caution .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

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 ROCKER ARM COVER CLEANING AND INSPECTION

Fig. 497: View Of Valve Rocker Arm Cover
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Safety Glasses Caution .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

1. Inspect the oil fill tube (423) for a loose fit or damage.

2. Inspect the covers (505) for the following conditions:

Scoring or damage to the gasket surfaces

Ventilation system passages for restrictions

Threaded bolt holes for damage or debris

OIL PAN CLEANING AND INSPECTION

IMPORTANT:

Do not use the valve rocker arm cover gasket again.
Install a NEW gasket during assembly.

Remove the ignition coils before cleaning the cover in
solvent. Do not submerge the ignition coils in solvent.

Do not remove the oil fill tube from the covers unless
service is required. If the tube is removed from the
cover, install a NEW tube (423) and seal (422) during
assembly.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 498: View Of Oil Filter Fitting
Courtesy of GENERAL MOTORS CORP.

1. Remove the oil filter fitting (438), as required.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2