Hummer H2. Manual — part 1859

Fig. 599: View Of J 41556
Courtesy of GENERAL MOTORS CORP.

7. Use the J 41556 to guide the connecting rod onto the crankshaft journal. See Special Tools and

Equipment .

8. Remove the J 41556 from the connecting rod. See Special Tools and Equipment .

2004 Hummer H2

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

Fig. 600: Connecting Rod & Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE:

Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or
sealant are identified in the service procedure. Do not use paints,

2004 Hummer H2

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

9. Install the bearing cap, bearing half, and bolts.

Tighten:

1. Tighten the bolts a first pass to 20 N.m (15 lb ft).

2. Tighten the bolts a final pass to 75 degrees using the J 45059 . See Special Tools and Equipment .

Fig. 601: Measuring Connecting Rods Side Clearance

lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces
unless specified. These coatings affect fastener torque and joint clamping
force and may damage the fastener. Use the correct tightening sequence
and specifications when installing fasteners in order to avoid damage to
parts and systems.

IMPORTANT: The connecting rod and cap must be assembled with the mating surfaces

properly aligned.

2004 Hummer H2

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

Courtesy of GENERAL MOTORS CORP.

10. Measure the connecting rods for the proper side clearance. Refer to Engine Mechanical Specifications .

CAMSHAFT INSTALLATION

Fig. 602: Camshaft Front Bolt Holes
Courtesy of GENERAL MOTORS CORP.

1. Lubricate the camshaft journals and the bearings with clean engine oil.

2. Install 3 M8 - 1.25 x 100 mm (M8 - 1.25 x 4.0 in) bolts into the camshaft front bolt holes.

IMPORTANT: If camshaft replacement is required, the valve lifters must also be

replaced.

NOTE:

All camshaft journals are the same diameter, so care must be used in

2004 Hummer H2

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