Hummer H2. Manual — part 1735

Fig. 136: Front Cover & Gasket
Courtesy of GENERAL MOTORS CORP.

1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 in) long to the oil

pan to engine block junction.

2. Install the front cover gasket and cover.

crankshaft front oil seal.

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All gasket surfaces should be free of oil or other foreign material
during assembly.

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The crankshaft front oil seal MUST be centered in relation to the
crankshaft.

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An improperly aligned front cover may cause premature front oil seal
wear and/or engine oil leaks.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

3. Install the front cover bolts until snug. Do not overtighten.

Fig. 137: Oil Pan-To-Front Cover Bolts
Courtesy of GENERAL MOTORS CORP.

4. Install the oil pan-to-front cover bolts until snug. Do not over tighten.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

Fig. 138: View of J 41476
Courtesy of GENERAL MOTORS CORP.

5. Install J 41476 to the front cover. See Special Tools and Equipment .

6. Align the tapered legs of the J 41476 with the machined alignment surfaces on the front cover. See

Special Tools and Equipment .

NOTE:

Refer to Fastener Notice in Cautions and Notices.

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2

7. Install the crankshaft balancer bolt until snug. Do not overtighten.

Tighten:

1. Tighten the oil pan to front cover bolts to 25 N.m (18 lb ft).

2. Tighten the engine front cover bolts to 25 N.m (18 lb ft).

8. Remove the J 41476 . See Special Tools and Equipment .

9. Install a NEW crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Replacement .

10. Install the water pump. Refer to Water Pump Replacement in Engine Cooling.

CRANKSHAFT REAR OIL SEAL REPLACEMENT

Tools Required

J 41479 Crankshaft Rear Oil Seal Installer. See Special Tools and Equipment .

Removal Procedure

2004 Hummer H2

2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2