Hummer H2. Manual — part 1885

Fig. 689: View Of J 42386-A & Bolts
Courtesy of GENERAL MOTORS CORP.

1. Install the J 42386-A and bolts.

Use one M10 - 1.5 x 120 mm and one M10 - 1.5 x 45 mm bolt for proper tool operation.

Tighten: Tighten the J 42386-A bolts to 50 N.m (37 lb ft).

IMPORTANT:

z

The crankshaft balancer is balanced as an individual component. It
is not necessary to mark the balancer prior to removal.

z

The crankshaft balancer installation and bolt tightening involves a
four stage tightening process. The first pass ensures that the
balancer is installed completely onto the crankshaft. The second,
third and fourth passes tighten the new bolt to the proper torque.

z

The used crankshaft balancer bolt will be used only during the first
pass of the balancer installation procedure. Install a NEW crankshaft
balancer bolt and tighten as described in the second, third and
fourth passes of the balancer bolt tightening procedure.

z

Ensure the teeth of the tool engage the engine flywheel teeth.

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

Fig. 690: View Of Crankshaft Balancer
Courtesy of GENERAL MOTORS CORP.

2. Install the balancer onto the end of the crankshaft.

IMPORTANT: The balancer should be positioned onto the end of the crankshaft as

straight as possible prior to tool installation.

2004 Hummer H2

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

Fig. 691: View Of J 41665
Courtesy of GENERAL MOTORS CORP.

3. Use the J 41665 in order to install the balancer. See Special Tools and Equipment .

1. Assemble the threaded rod, nut, washer and installer.

Insert the smaller end of the installer into the front of the balancer.

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

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

crankshaft.

4. Remove the tool and reverse the installation tool.

2004 Hummer H2

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

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.

4. Install the used crankshaft balancer bolt.

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

5. Remove the used crankshaft balancer bolt.

2004 Hummer H2

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