Hummer H2. Manual — part 1804

Fig. 399: Bearing Cap Bolt & Bearing Half
Courtesy of GENERAL MOTORS CORP.

1. Rotate the crankshaft until the journal/connecting rod to be measured is in the 12 o'clock position.

2. Remove a bearing cap and bolts (1).

3. Remove the bearing half (2).

IMPORTANT: The crankshaft must be secure with no movement or rotation in order to

obtain an accurate reading.

2004 Hummer H2

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

4. Insert a piece of paper card stock onto the crankshaft journal.

5. Install the bearing half (2) and cap and bolts (1). Refer to Fastener Tightening Specifications .

Fig. 400: J 43690-2, J 43690-3, J 43690-101, 280310 & J 43690-5
Courtesy of GENERAL MOTORS CORP.

6. Install the following:

1. J 43690-2 (5)

2. J 43690-3 (4)

3. J 43690-101 (2)

2004 Hummer H2

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

4. 280310 (3)

5. J 43690-5 (1)

Fig. 401: Identifying Swivel Base & Indicator
Courtesy of GENERAL MOTORS CORP.

7. Install the swivel base (1) and dial indicator (2).

8. Adjust per the manufacturers instructions and measure the connecting rod bearing clearance.

A connecting rod with a clearance in excess of 0.076 mm (0.003 in) is considered excessive. Service
components as required.

CRANKSHAFT BALANCER CLEANING AND INSPECTION

2004 Hummer H2

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

Fig. 402: View Of Crankshaft Balancer
Courtesy of GENERAL MOTORS CORP.

1. Clean the crankshaft balancer in solvent.

2. Clean the belt grooves of all dirt or debris with a wire brush.

3. Dry the crankshaft balancer with compressed air.

4. Inspect the crankshaft balancer for the following:

2004 Hummer H2

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