Exhaust Camshaft Installation

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

Fig 1: Identifying Hydraulic Lash Adjusters

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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: View Of Valve Tips

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

Fig 3: View Of Camshaft Roller Finger Followers

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NOTE: 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: Identifying Proper Exhaust/Intake Camshaft Alignment positions

Courtesy of GENERAL MOTORS CORP.

NOTE: The engine is timed top-dead center exhaust stroke.

When installing the camshafts, ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.

Fig 5: View Of Exhaust 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.

CAUTION: Refer to Fastener Caution .

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