Chevrolet Silverado / GMC Sierra. Service manual — part 160

1. Mark, sort, and organize the components for assembly.

2. Clean the components with cleaning solvent.

3. Dry the components with compressed air.

4. Inspect the valve rocker arm components for the following:

Valve rocker arm valve pushrod socket contact surface (1)

The contact surface must be smooth with no scoring or excessive wear.

Valve rocker arm roller pivot for binding or damage (2)

Valve rocker arm valve stem contact surface (3)

The contact surface should be smooth with no scoring or excessive wear.

Valve rocker arm bolt threads for damage (4)

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 535: Pushrod Inspection Areas
Courtesy of GENERAL MOTORS CORP.

5. Inspect the valve pushrods for the following:

Restriction of the oil passage (1)

Wear or scoring of the end contact surfaces (2)

The end contact surfaces must be smooth with no scoring or excessive wear.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Shaft for bends (3)

Roll the valve pushrod on a flat surface to determine if the valve pushrod is bent.

Fig. 536: Valve Rocker Support
Courtesy of GENERAL MOTORS CORP.

6. Inspect the valve rocker support for excessive wear or damage.

VALVE LIFTERS AND GUIDES CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 537: Valve Lifters & Guides
Courtesy of GENERAL MOTORS CORP.

1. Mark, sort, and organize the components for assembly.

2. Clean the components in cleaning solvent.

3. Dry the components with compressed air.

CAUTION: Refer to SAFETY GLASSES CAUTION

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado