Hummer H2. Manual — part 1733

the crankshaft.

4. Remove the tool and reverse the installation tool.

Position the larger end of the installer against the front of the balancer.

5. Use a wrench and hold the hex end of the threaded rod.

6. Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed

onto the crankshaft.

7. Remove the balancer installation tool.

2004 Hummer H2

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

Fig. 130: Balancer Proper Installation Position
Courtesy of GENERAL MOTORS CORP.

3. Install the used crankshaft balancer bolt.

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

Tighten: Tighten the USED crankshaft balancer bolt to 330 N.m (240 lb ft).

4. Remove the used crankshaft balancer bolt.

5. Measure for a correctly installed balancer.

If the balancer is not installed to the proper dimensions, install the J 41665 . See Special Tools and
Equipment .

6. Install a NEW crankshaft balancer bolt.

Tighten:

1. Tighten the crankshaft balancer bolt a first pass to 50 N.m (37 lb ft).

2. Tighten the crankshaft balancer bolt a second pass to 140 degrees using the J 45059 . See Special

Tools and Equipment .

7. Remove the J 42386-A .

8. Install the starter motor. Refer to Starter Motor Replacement .

9. Install the fan shroud. Refer to Fan Shroud Replacement .

10. Install the accessory drive belt (if not equipped with A/C). Refer to Drive Belt Replacement -

Accessory .

11. Install the A/C drive belt (if equipped). Refer to Drive Belt Replacement - Air Conditioning .

12. Perform the crankshaft position (CKP) system variation learn procedure. Refer to CKP System

Variation Learn Procedure .

CRANKSHAFT FRONT OIL SEAL REPLACEMENT

Tools Required

J 41478 Crankshaft Front Oil Seal Installer. See Special Tools and Equipment .

Removal Procedure

IMPORTANT: The nose of the crankshaft should be recessed 2.4-4.48 mm (0.094-0.176

in) into the balancer bore.

2004 Hummer H2

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

Fig. 131: Crankshaft Front Oil Seal
Courtesy of GENERAL MOTORS CORP.

1. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement .

2. Remove the crankshaft oil seal (1) from the front cover.

Installation Procedure

2004 Hummer H2

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