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. 

{

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

{

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

{

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