Hummer H2. Manual — part 1782

Fig. 316: Valve Rocker Arm Pivot Support
Courtesy of GENERAL MOTORS CORP.

3. Remove the valve rocker arm pivot support.

2004 Hummer H2

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

Fig. 317: View Of Pushrods
Courtesy of GENERAL MOTORS CORP.

4. Remove the pushrods.

CYLINDER HEAD REMOVAL - LEFT

2004 Hummer H2

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

Fig. 318: Cylinder Head & Bolts (Left)
Courtesy of GENERAL MOTORS CORP.

1. Remove the spark plugs from the cylinder head.

2. Remove the cylinder head bolts.

IMPORTANT: The cylinder head bolts can NOT be used again. Install NEW cylinder head

bolts during assembly.

NOTE:

After removal, place the cylinder head on two wood blocks to prevent
damage to the sealing surfaces.

2004 Hummer H2

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

3. Remove the cylinder head.

Fig. 319: Cylinder Head Gasket (Left)
Courtesy of GENERAL MOTORS CORP.

4. Remove the gasket.

5. Discard the gasket.

6. Discard the cylinder head bolts.

CYLINDER HEAD REMOVAL - RIGHT

2004 Hummer H2

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