52. Intake Camshaft, Follower, and Adjuster Install

Intake Camshaft, Follower, and Adjuster Install




1. Install the hydraulic lash adjusters into their bores in the cylinder head.
2. Lubricate the hydraulic lash adjusters with GM P/N 12345501 (Canadian P/N 992704) or equivalent.




3. Lubricate the valve tips.





Important: Used roller followers must be returned to the original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.

4. Position the roller followers on the tip of the valve stem and on the lash adjuster. Lubricate roller followers with GM P/N 12345501 (Canadian P/N 992704) or equivalent.




5. Set the intake camshaft on top of the roller followers in the camshaft journals. Lubricate with GM P/N 12345501 (Canadian P/N 992704) or equivalent.
6. Install the camshaft caps and hand start the camshaft cap bolts.




7. The timing chain sprocket alignment notch should be oriented to the 11 o'clock position.
Notice: Refer to Fastener Notice.

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

Tighten the camshaft caps to 10 N.m (89 lb in).




9. Apply sealer GM P/N 12378521 (Canadian P/N 88901148) or equivalent to rear intake camshaft cap.
10. Install the rear intake camshaft cap bolts.

Tighten the bolts to 25 N.m (18 lb ft).