Chevrolet Silverado / GMC Sierra. Service manual — part 268

Fig. 117: View Of Left Cylinder Head Gasket & Locator Pins
Courtesy of GENERAL MOTORS CORP.

6. Install the NEW left cylinder head gasket onto the locating pins.

IMPORTANT: When properly installed, the tab on the left cylinder head

gasket will be located left of center or closer to the front of
the engine.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 118: View Of Left Cylinder Head
Courtesy of GENERAL MOTORS CORP.

7. Install the cylinder head onto the locating pins and gasket.

8. Install the NEW cylinder head bolts.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Fig. 119: Cylinder Head Bolt Tightening Sequence
Courtesy of GENERAL MOTORS CORP.

9. Tighten the cylinder head bolts.

Tighten:

1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb

ft).

2. Tighten the M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees

using J 45059 . See Special Tools.

3. Tighten the M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees

using J 45059 . See Special Tools.

4. Tighten the M8 cylinder head bolts (11-15) to 30 N.m (22 lb ft). Begin with the center

bolt (11) and alternating side-to-side, work outward tightening all of the bolts.

10. Install the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement.

11. Install the left exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side .

12. Install the coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Assembly

Replacement .

13. Install the generator bracket. Refer to Generator Replacement .

CYLINDER HEAD REPLACEMENT - RIGHT SIDE

NOTE:

Refer to Fastener Notice .

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

Special Tools

J 45059 Angle Meter. See Special Tools.

J 42385-200 Thread Repair Kit. See Special Tools.

Removal Procedure

1. Remove the oil level indicator. Refer to Oil Level Indicator and Tube Replacement.

2. Remove the coolant air bleed pipe. Refer to Coolant Air Bleed Pipe Assembly

Replacement .

3. Remove the right exhaust manifold. Refer to Exhaust Manifold Replacement - Right

Side .

4. Remove the pushrods. Refer to Valve Rocker Arm and Push Rod Replacement.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2