Chevrolet Silverado / GMC Sierra. Service manual — part 154

Fig. 517: Locating Flywheel Weights (Manual Transmission)
Courtesy of GENERAL MOTORS CORP.

4. Inspect the engine flywheel, manual transmission, if equipped, for loose or improperly

installed flywheel weights, if applicable.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

A properly installed flywheel weight should be installed until flush or below flush with the
face of the engine flywheel.

Fig. 518: Flywheel Inspection Areas (Manual Transmission)
Courtesy of GENERAL MOTORS CORP.

5. Inspect the engine flywheel, manual transmission, if equipped, for the following:

Pitted friction surface (1)

Scoring or grooves (2)

Rust or other surface damage (3)

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Damaged ring gear teeth (4)

Loose or improperly positioned ring gear

The ring gear has an interference fit onto the engine flywheel and the ring gear should
be positioned completely flat against the flange of the engine flywheel.

CAMSHAFT AND BEARINGS CLEANING AND INSPECTION

Tools Required

J 7872 Magnetic Base Dial Indicator

Cleaning and Inspection

Fig. 519: Camshaft & Retainer Plate
Courtesy of GENERAL MOTORS CORP.

1. Clean the engine camshaft in cleaning solvent.

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

2. Dry the engine camshaft with compressed air.

3. Inspect the camshaft retainer plate for damage.

If the camshaft retainer plate is damaged, replace as necessary.

4. Inspect the camshaft bearings for correct fit into the engine block camshaft bearing bores.

The camshaft bearings have an interference fit to the engine block camshaft bearing bores
and must not be loose in the engine block camshaft bearing bores.

5. Inspect the camshaft bearings for excessive wear or scoring.

IMPORTANT: If any camshaft bearing is excessively worn or scored,

replace all the camshaft bearings.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado