Chevrolet Silverado / GMC Sierra. Service manual — part 274

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

started onto 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 tools.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 137: Identifying Hub To Crankshaft Distance
Courtesy of GENERAL MOTORS CORP.

3. Install the used crankshaft balancer bolt.

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - 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.

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.

7. Remove the J 42386-A . See Special Tools.

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

9. Install the fan shroud. Refer to Cooling Fan and 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 Air Conditioning Compressor Belt

Replacement.

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

Crankshaft Position System Variation Learn .

CRANKSHAFT FRONT OIL SEAL REPLACEMENT

Special Tools

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

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.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 138: View Of 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.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2