Exhaust Camshaft, Follower, and Adjuster Install

WARNING: This page is about a different variant/trim than selected.

Fig 1: Hydraulic Lash Adjusters

Courtesy of GENERAL MOTORS CORP.

Install the hydraulic lash adjusters into their bores in the cylinder head. Apply lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent.

Fig 2: Valve Tips

Courtesy of GENERAL MOTORS CORP.

Lubricate the valve tips with GM P/N 12345501 (Canadian P/N 992704) or equivalent.

Fig 3: Identifying Camshaft Roller Finger Followers

Courtesy of GENERAL MOTORS CORP.

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 adjuster. Apply lubricant GM P/N 12345501 (Canadian P/N 992704) or equivalent.

Fig 4: Camshaft Caps

Courtesy of GENERAL MOTORS CORP.

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

NOTE: Refer to Fastener Notice .

Tighten the camshaft cap bolts in increments of 3 turns until they are seated, lubricate.
Tighten: Tighten the camshaft caps to 10 N.m (89 lb in).