Chevrolet Silverado / GMC Sierra. Manual — part 157

2. Install the NEW camshaft outer bearings #4 and #1.

1. Install the NEW camshaft outer bearing #4 onto the J 33049 expander assembly. See

Special Tools.

2. Tighten the J 33049 expander assembly nut until snug. See Special Tools.

3. Align the lubrication hole of the camshaft outer bearing #4 above the 3 o'clock

position or the 9 o'clock position of the camshaft outer bearing bore #4 at the rear of
the engine block.

4. Drive the camshaft outer bearing #4 into the camshaft outer bearing bore #4 at the rear

of the engine block.

5. Loosen the J 33049 expander assembly nut. See Special Tools.

6. Remove the camshaft outer bearing #4 from the J 33049 expander assembly. See

Special Tools.

7. Install the NEW camshaft outer bearing #1 onto the J 33049 expander assembly. See

Special Tools.

8. Tighten the J 33049 expander assembly nut until snug. See Special Tools.

9. Align the lubrication hole of the camshaft outer bearing #1 above the 3 o'clock

position or the 9 o'clock position of the camshaft outer bearing bore #1 at the front of
the engine block.

10. Drive the camshaft outer bearing #1 into the camshaft outer bearing bore #1 at the

front of the engine block.

11. Loosen the J 33049 expander assembly nut. See Special Tools.

12. Carefully slide the J 33049 into the engine block until the J 33049 expander assembly

is positioned between the camshaft inner bearing bores. See Special Tools.

3. Install the NEW camshaft inner bearings #3 and #2.

1. Install the NEW camshaft inner bearing #3 onto the J 33049 expander assembly. See

Special Tools.

2. Tighten the J 33049 expander assembly nut until snug. See Special Tools.

3. Align the lubrication hole of the camshaft inner bearing #3 above the 3 o'clock

position or the 9 o'clock position of the camshaft inner bearing bore #3 of the engine
block.

4. Push the J 33049 guide cone into the camshaft front bearing bore #1 in order to align

the J 33049 . See Special Tools.

and help center the camshaft inner bearings during the
installation process. See Special Tools.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

5. Drive the camshaft inner bearing #3 into the camshaft inner bearing bore #3.

6. Loosen the J 33049 expander assembly nut. See Special Tools.

7. Carefully slide the J 33049 until the J 33049 expander assembly is positioned between

the camshaft inner bearing bore #2 and the camshaft outer bearing bore #1. See
Special Tools.

8. Install the NEW camshaft inner bearing #2 onto the J 33049 expander assembly. See

Special Tools.

9. Tighten the J 33049 expander assembly nut until snug. See Special Tools.

10. Align the lubrication hole of the camshaft inner bearing #2 above the 3 o'clock

position or the 9 o'clock position of the camshaft inner bearing bore #2 of the engine
block.

11. Push the J 33049 guide cone into the camshaft front bearing bore #1 in order to align

the J 33049 . See Special Tools.

12. Drive the camshaft inner bearing #2 into the camshaft inner bearing bore #2.

13. Loosen the J 33049 expander assembly nut. See Special Tools.

4. Carefully remove the J 33049 from the engine block. See Special Tools.

BALANCE SHAFT BEARING AND/OR BUSHING REMOVAL

Tools Required

J 26941 Bushing/Bearing Remover. See Special Tools.

J 38834 Balance Shaft Service Kit. See Special Tools.

Removal

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado

Fig. 528: Removing Balance Shaft Rear Bearing
Courtesy of GENERAL MOTORS CORP.

1. Use the J 38834 and the J 26941 in order to remove the balance shaft rear bearing. See

Special Tools.

1. Install J 26941 legs behind the balance shaft rear bearing and secure. See Special

Tools.

2. Install the J 38834-1 with the short threaded end through the balance shaft bore in the

front of the engine block.

3. Install the J 38834-1 into J 26941 . See Special Tools.

CAUTION: Refer to SAFETY GLASSES CAUTION .

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado