Chevrolet Silverado / GMC Sierra. Service manual — part 127

Fig. 425: Checking Camshaft Timing Chain Free Play
Courtesy of GENERAL MOTORS CORP.

4. Check the camshaft timing chain free play.

1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the

camshaft timing chain (2).

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

2. Measure the free play on the slack side (3) of the camshaft timing chain.

If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in),
dimension a, replacement of the camshaft timing chain and the sprockets is
recommended during assembly.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 426: Camshaft Sprocket & Bolts
Courtesy of GENERAL MOTORS CORP.

5. Remove the camshaft sprocket bolts.

Fig. 427: Camshaft Sprocket And The Camshaft Timing Chain
Courtesy of GENERAL MOTORS CORP.

6. Remove the camshaft sprocket and the camshaft timing chain.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 428: J 5825-A
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado