Hummer H2. Manual — part 1876

Fig. 657: Valve Rocker Arm Cover (Left)
Courtesy of GENERAL MOTORS CORP.

2. Install the valve rocker arm cover onto the cylinder head.

3. Install the cover bolts with grommets.

Tighten: Tighten the valve rocker arm cover bolts to 12 N.m (106 lb in).

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. 658: Ignition Coil & Bracket Assembly (Left)
Courtesy of GENERAL MOTORS CORP.

4. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the threads of the

bracket bolts.

5. Install the ignition coils and bracket assembly and bolts.

Tighten: Tighten the ignition coil and bracket assembly bolts to 12 N.m (106 lb in).

2004 Hummer H2

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

VALVE ROCKER ARM COVER INSTALLATION - RIGHT

Fig. 659: View Of Oil Fill Tube
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

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All gasket surfaces should be free of oil or other foreign material

2004 Hummer H2

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

1. Lubricate the O-ring seal of the NEW oil fill tube with clean engine oil.

2. Insert the NEW oil fill tube into the rocker arm cover and rotate the tube clockwise until locked in the

proper position.

3. Install the oil fill cap into the tube and rotate clockwise until locked in the proper position.

during assembly.

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Do not use the valve rocker arm cover gasket again.

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Do not remove the ignition coils and bracket from the valve rocker
arm cover unless required.

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The valve rocker arm cover bolt grommets may be used again.

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If the oil fill tube has been removed from the valve rocker arm cover,
install a NEW oil fill tube during assembly.

2004 Hummer H2

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