51. Intake Camshaft, Bearing Cap, and Lash Adjuster Installation

Intake Camshaft, Bearing Cap, and Lash Adjuster Installation





1. Install the hydraulic element lash adjusters into their bores in the cylinder head.
2. Lubricate the hydraulic lash adjusters with GM P/N 1234550 (Canadian P/N 992704) or equivalent.





3. Lubricate the valve tips.





4. 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.

Position the roller followers on the tip of the valve stem and on the lash adjustor. 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 bearing journals. Lubricate with GM P/N 12345501 (Canadian P/N 992704) or equivalent.
6. Install the camshaft bearing caps and hand start the camshaft cap bolts.





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

8. Notice: Refer to Fastener Notice in Service Precautions.

Tighten the camshaft bearing cap bolts in increments of 3 turns until they are seated.
^ Tighten the camshaft bearing caps to 10 Nm (89 inch lbs.).





9. Apply anaerobic sealer, 3.5 mm (0.138 inch) bead, GM P/N 1052942 (Canadian P/N 10953466) or equivalent to rear intake camshaft bearing cap.
10. Install the rear intake camshaft bearing cap bolts.
^ Tighten the bolts to 25 Nm (18 ft. lbs.).