Tools Required

J 43655 Camshaft Sprocket Holding Tool

1. Remove the camshaft cover. Refer to Camshaft Cover Replacement .



2. Remove the upper timing chain guide.



3. Install the J 43655 .



4. Remove both the intake and exhaust camshaft sprocket bolts and discard.
5. Slide the camshaft sprockets forward.



6. Remove the power steering pump bolts and set pump aside.



7. Mark the caps to ensure they are installed in the original position.

Important: Remove each bolt on each cap one turn at a time until there is no spring tension on the camshaft.

8. Remove the caps.
9. Remove the intake camshaft.



10. Remove the camshaft roller followers.



11. Remove the hydraulic lash adjusters.

1. Lubricate the valve tips.



2. Install the hydraulic lash adjusters.



3. Install the camshaft roller followers.



4. Ensure that the alignment notches are aligned with the camshaft sprocket.



5. Install the intake camshaft.
6. Install the camshaft caps.

Notice: Refer to Fastener Notice in the Preface section.

7. Tighten the camshaft cap bolts in increments of 3 turns until they are seated.

Tighten
Tighten the camshaft cap bolts to 10 N·m (89 lb in).




8. Apply anaerobic sealer, 3.5 mm (0.138 in) bead, GM P/N 1052942 (Canadian P/N 10953466) to the rear intake camshaft bearing cap.
9. Install the rear intake camshaft bearing cap bolts.

Tighten
Tighten the bolts to 25 N·m (19 lb ft).

10. Install camshaft sprockets onto the camshafts.
11. Hand tighten NEW camshaft sprocket bolts.
12. Remove the J 43655 .



13. Tighten the camshaft sprocket bolts.

Tighten
Tighten the bolts to 85 N·m (63 lb ft) plus 30 degrees.




14. Install the upper timing chain guide.

Tighten
Tighten the upper timing chain guide to 10 N·m (89 lb in).




15. Install the power steering pump.

Tighten
Tighten the power steering pump bolts to 25 N·m (18 lb ft).

16. Install the camshaft cover. Refer to Camshaft Cover Replacement .