Exhaust Camshaft, Bearing Cap, and Lash Adjuster Install

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

Fig 1: View Of Hydraulic Element Lash Adjusters

Courtesy of GENERAL MOTORS CORP.

Fig 2: Lubricating Valve Tips

Courtesy of GENERAL MOTORS CORP.

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

Fig 3: Identifying Exhaust Camshaft Roller 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. Lubricate the roller followers with engine oil supplement.

Fig 4: View Of Camshaft & Bearing Caps

Courtesy of GENERAL MOTORS CORP.

Set the exhaust camshaft on top of the roller followers in the camshaft bearing journals. Lubricate with engine oil supplement.
Install the camshaft bearing caps and hand start the camshaft cap bolts.
NOTE: Refer to Fastener Notice in Cautions and Notices.

Fig 5: View Of Timing Chain Sprocket Alignment Notch

Courtesy of GENERAL MOTORS CORP.

The timing chain sprocket alignment notch should be oriented to the two o' clock position.
Tighten the camshaft bearing cap bolts in increments of three turns until they are seated, lubricate.
Tighten: Tighten the camshaft bearing caps to 10 N.m (89 lb in).