Chevrolet Silverado / GMC Sierra. Service manual — part 471

Replacement (LMM) .

2. Remove the intake manifold. Refer to Intake Manifold Replacement - Left Side.

3. Remove the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side

(6.6L) .

4. Remove the bolt and ground straps from the rear of the cylinder head.

5. Remove the valve rocker arm shaft, pushrods, and valve bridges. Refer to Valve Rocker

Arm, Shaft, and Push Rod Replacement.

6. Remove the glow plugs. Refer to Glow Plug Replacement - Bank 2 .

7. Remove the cylinder head bolts in the sequence shown.

8. Discard the large M12 bolts.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 200: View Of Left Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

9. Remove the cylinder head.

10. Remove and discard the cylinder head gasket.

11. Clean the sealing surface of the engine block and the cylinder head.

NOTE:

Clean all dirt, debris, and coolant from the engine block
cylinder head bolt holes. Failure to remove all foreign material
may result in damaged threads, improperly tightened fasteners
or damage to components.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

12. Clean the cylinder head bolt holes in the engine block.

13. For service to the cylinder head refer to the following:

Cylinder Head Disassemble

Cylinder Head Cleaning and Inspection

Cylinder Head Assemble

Installation Procedure

Fig. 201: View Of Left Cylinder Head Gasket
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

1. Install the cylinder head gasket of the correct grade. Refer to Cylinder Head Gasket

Selection Specifications .

2. Install the cylinder head.

Fig. 202: Cylinder Head Bolt Installation Sequence
Courtesy of GENERAL MOTORS CORP.

NOTE:

The left and right cylinder head gaskets are not
interchangeable. Improper placement of the cylinder head
gasket will block coolant and oil passages. Blocked coolant
and oil passages will cause severe engine damage.

NOTE:

This component uses bolts with a preapplied molybdenum
disulfide coating for thread lubrication. Do not remove the
coating or use any additional lubricant. Improperly lubricated
threads will adversely affect the bolt torque and clamp load.
Improper bolt torque and clamp load can lead to engine

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado