Chevrolet Silverado / GMC Sierra. Service manual — part 2137

Fig. 86: Inspecting Areas Of Valve Lifters
Courtesy of GENERAL MOTORS CORP.

1. Clean the components in cleaning solvent.

IMPORTANT: Components that are to be used again must be marked,

sorted or organized for assembly.

CAUTION: Refer to Safety Glasses and Compressed Air Caution .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

2. Dry the components with compressed air.

3. Inspect the valve lifters for the following conditions:

Bent or broken clip (1)

Worn pushrod socket (2)

Scuffed or worn sides (3)

If the valve lifter shows wear, inspect the engine block lifter bores for wear or
damage.

Flat spots on the roller (4)

Loose or damaged pin (5)

Plugged oil hole (6)

Worn or damaged roller bearing

The roller should rotate freely with no binding or roughness.

Active Fuel Management Valve Lifters

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 87: Displacement On Demand Valve Lifters Assembly
Courtesy of GENERAL MOTORS CORP.

1. Clean the components in cleaning solvent.

IMPORTANT: Components that are to be used again must be marked,

sorted or organized for assembly.

CAUTION: Refer to Safety Glasses and Compressed Air Caution .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

2. Dry the components with compressed air.

3. Inspect the valve lifters for the following conditions:

Broken or collapsed spring (1)

Worn pushrod socket (2)

Plugged lubrication hole (3)

Plugged lifter oil-switching hole (4)

Flat spots on the roller (5)

Worn or damaged roller bearing (6)

The roller should rotate freely with no binding or roughness.

Scuffed or worn sides (7)

Valve Guides

Inspect the valve lifter guides for the following conditions:

Cracks or damage

Excessive wear in the lifter mounting bores

CYLINDER HEAD DISASSEMBLE

Tools Required

J 8062 Valve Spring Compressor - Head Off

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado