Hummer H2. Manual - part 1737

Fig. 143: Rear Cover, Bolts & Gasket 
Courtesy of GENERAL MOTORS CORP. 

3. Remove the rear cover bolts.  

4. Remove the rear cover and gasket.  

5. Discard the rear cover gasket.  

6. Clean and inspect the rear cover. Refer to Engine Rear Cover Cleaning and Inspection .  

Installation Procedure 

IMPORTANT:

z

Do not reuse the crankshaft oil seal or rear cover gasket.  

z

Do not apply any type of sealant to the rear cover gasket (unless 
specified).  

z

The special tool in this procedure is used to properly center the 
crankshaft rear oil seal.  

z

The crankshaft rear oil seal will be installed after the rear cover has been 

 

2004 Hummer H2 

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

  

Fig. 144: Sealant Applied To Rear Oil Pan-To-Engine Block Junction

installed and aligned. 

Install the rear cover without the crankshaft oil seal. 

{

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

{

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

{

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

 

2004 Hummer H2 

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

  

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. 

Fig. 145: Rear Cover, Bolts & Gasket 
Courtesy of GENERAL MOTORS CORP. 

2. Install the rear cover gasket and cover.  

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

 

2004 Hummer H2 

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

  

Fig. 146: Oil Pan-To-Rear Cover Bolts 
Courtesy of GENERAL MOTORS CORP. 

4. Install the oil pan-to-rear cover bolts (1) until snug. Do not overtighten. 

 

2004 Hummer H2 

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