Hummer H2. Manual — part 1816

Fig. 444: Piston Rings & Piston
Courtesy of GENERAL MOTORS CORP.

5. Using piston ring pliers, install the piston rings onto the piston.

6. Position the oil control ring end gaps a minimum of 25 mm (1.0 in) from each other.

7. Position the compression ring end gaps 180 degrees opposite each other.

2004 Hummer H2

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

Fig. 445: Piston & Connecting Rod Components
Courtesy of GENERAL MOTORS CORP.

8. Install the connecting rod bearings (3) to the rod (2) and cap (4).

CAMSHAFT BEARING REMOVAL

Tools Required

J 33049 Camshaft Bearing Service Set. See Special Tools and Equipment .

Removal Procedure

2004 Hummer H2

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

Fig. 446: Camshaft Bearings
Courtesy of GENERAL MOTORS CORP.

1. Prior to bearing removal, inspect the camshaft bearings for loose fit in the engine block bearing bores.

Refer to Camshaft and Bearings Cleaning and Inspection .

2. Repair or replace the components as required.

IMPORTANT: A loose camshaft bearing may be caused by an enlarged, out of round or

damaged engine block bearing bore.

2004 Hummer H2

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

Fig. 447: J 33049 Camshaft Bearing Service Kit Components
Courtesy of GENERAL MOTORS CORP.

3. Select the expanding driver (4-8) and washer (2 or 3) from the J 33049 . See Special Tools and

Equipment .

4. Assemble the tool.

2004 Hummer H2

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