Hummer H2. Manual - part 1731

Fig. 123: Valve Lifters & Lifter Guides
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the valve lifters and engine block valve lifter bores with clean engine oil.

2. Insert the valve lifters into the lifter guides.

Align the flat area on the top of the lifter with the flat area in the lifter guide bore. Push the lifter
completely into the guide bore.

2004 Hummer H2

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

Fig. 124: Valve Lifters & Guide
Courtesy of GENERAL MOTORS CORP.

3. Install the valve lifters and guide to the engine block.

4. Install the valve lifter guide bolt (1).

Tighten: Tighten the valve lifter guide bolt (1) to 12 N.m (106 lb in).

5. Install the cylinder head and gasket. Refer to Cylinder Head Replacement - Left or Cylinder Head

Replacement - Right .

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

CRANKSHAFT BALANCER REPLACEMENT

Tools Required

J 41816 Crankshaft Balancer Remover

J 41816-2 Crankshaft End Protector

J 42386-A Flywheel Holding Tool

J 41665 Crankshaft Balancer and Sprocket Installer. See Special Tools and Equipment .

J 45059 Angle Meter. See Special Tools and Equipment .

Removal Procedure

1. Remove the fan shroud. Refer to Fan Shroud Replacement .

2. Remove the starter motor. Refer to Starter Motor Replacement .

2004 Hummer H2

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

Fig. 125: View Of J 42386-A & Bolts
Courtesy of GENERAL MOTORS CORP.

3. Install the J 42386-A .

IMPORTANT:

Make sure that the teeth of the J 42386-A are fully engaged into the
flywheel ring gear teeth.

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

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