Chevrolet Silverado / GMC Sierra. Service manual — part 159

3. Install the J 38834-2 onto the J 38834-1 so that the smaller diameter of the J 38834-2

will be facing the front of the engine block.

4. Install the J 38834-2 on the inside of the balance shaft front bearing bore.

5. Lubricate the NEW balance shaft rear bearing with clean engine oil.

6. Install the balance shaft rear bearing onto the J 38834-2.

7. Align the balance shaft rear bearing for installation.

8. Using a wrench secure the J 38834-1 into place.

9. Rotate the J 38834 nut until the balance shaft rear bearing is properly and completely

pushed into the balance shaft rear bearing bore. See Special Tools.

2. Remove the J 38834 . See Special Tools.

CAMSHAFT TIMING CHAIN AND SPROCKET CLEANING AND INSPECTION

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 532: View Of Sprockets & Chain
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

1. Clean the components with cleaning solvent.

2. Dry the components with compressed air.

3. Inspect the camshaft timing chain for binding or wear.

Fig. 533: Identifying Damaged Sprocket Teeth
Courtesy of GENERAL MOTORS CORP.

4. Inspect the camshaft sprocket and the crankshaft sprocket for:

Broken teeth (1)

Damaged teeth (2)

Chipped teeth (3)

Worn teeth

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Uneven wear on the edge of the teeth

Worn valleys between the sprocket teeth

Crankshaft sprocket keyway for wear

5. Inspect the timing chain tensioner bracket and shoe for cracking and wear.

VALVE ROCKER ARM AND PUSH ROD CLEANING AND INSPECTION

Fig. 534: Pushrod Socket, Roller Pivot & Valve Stem Tip
Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Parts that are to be reused must be marked, sorted, and

organized for assembly.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado