Hummer H2. Manual - part 1864

Tighten: Tighten the tool-to-engine block bolts to 25 N.m (18 lb ft).

Fig. 617: View Of J 41480 & J 41476 
Courtesy of GENERAL MOTORS CORP. 

5. Rotate the crankshaft until 2 opposing flywheel bolt holes are parallel to the oil pan surface. 

IMPORTANT: To properly align the rear cover, the J 41476 must be installed onto the 

rear of the crankshaft with the tool mounting bolts parallel to the oil pan 
surface. See Special Tools and Equipment .

 

2004 Hummer H2 

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

  

Fig. 618: View Of J 41480 & J 41476 Installed 
Courtesy of GENERAL MOTORS CORP. 

6. Install the J 41476 and bolts onto the rear of the crankshaft. See Special Tools and Equipment . 

Tighten:  

1. Tighten the tool mounting bolts until snug. Do not overtighten.  

2. Tighten the J 41480 tool-to-rear cover bolts evenly to 12 N.m (106 lb in).  

3. Tighten the rear cover bolts to 25 N.m (18 lb ft). 

IMPORTANT: The tapered legs of the alignment tool must enter the rear cover oil seal 

bore.

 

2004 Hummer H2 

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

  

7. Remove the tools. 

Fig. 619: Rear Cover-To-Engine Block Proper Installation Position 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

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

  

8. Measure the rear cover-to-engine block oil pan surface for flatness. 

1. Place a straight edge onto the engine block and rear cover oil pan sealing surfaces. 

Avoid contact with the portion of the gasket that protrudes into the oil pan surface. 

2. Insert a feeler gauge between the rear cover and the straight edge. The cover must be flush with the 

oil pan or no more than 0.5 mm (0.02 in) below flush.  

9. If the rear cover-to-engine block oil pan surface alignment is not within specifications, repeat the cover 

alignment procedure.  

10. If the correct rear cover-to-engine block alignment at the oil pan surface cannot be obtained, replace the 

rear cover.  

CRANKSHAFT REAR OIL SEAL INSTALLATION 

Tools Required 

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

 

2004 Hummer H2 

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