Hummer H3. Manual — part 107

Fig. 91: View Of Cylinder Head Bolts
Courtesy of GENERAL MOTORS CORP.

3. Remove and discard the cylinder head bolts.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 92: View Of Cylinder Head
Courtesy of GENERAL MOTORS CORP.

4. Remove the cylinder head.

5. Place the cylinder head on a flat, clean surface with the combustion chambers face up, in

order to prevent damage to the deck face.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

Fig. 93: View Of Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

6. Remove and discard the cylinder head gasket.

7. Remove all remaining gasket material from the engine block.

8. Inspect the cylinder head gasket mating surface on the engine block.

9. Clean and inspect the cylinder head. Refer to Cylinder Head Cleaning and Inspection.

10. Disassemble the cylinder head, if necessary. Refer to Cylinder Head Disassemble.

Installation Procedure

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3

1. Assemble the cylinder head, if necessary. Refer to Cylinder Head Assemble.

Fig. 94: View Of Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

2. Install the dowel pins, cylinder head locator, if necessary.

3. Position a NEW cylinder head gasket onto the engine block.

IMPORTANT: Ensure number 1 cylinder is at top dead center.

2006 Hummer H3

2006 ENGINE Engine Mechanical - 3.5L (L52) - H3