Installation Procedure

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IMPORTANT: When reusing the valve train components, always install the components to the original location and position.

Valve lash is net build, no valve adjustment is required.

Fig 1: View Of Valve Rocker Arm Pivot Support

Courtesy of GENERAL MOTORS CORP.

Lubricate the valve rocker arms and pushrods with clean engine oil.
Lubricate the flange of the valve rocker arm bolts with clean engine oil.
Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
Install the valve rocker arm pivot support.

Fig 2: View Of Pushrods

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Make sure that the pushrods seat properly to the valve lifter sockets.

Install the pushrods.

Fig 3: View Of Rocker Arms & Bolts

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Make sure that the pushrods seat properly to the ends of the rocker arms. DO NOT tighten the rocker arm bolts at this time.

Install the rocker arms and bolts.

Fig 4: View of Crankshaft/Camshaft In Position For Number 1 Piston At TDC

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Rotate the crankshaft until the number one piston is at top dead center (TDC) of the compression stroke.
In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position.

The engine firing order is 1,8,7,2,6,5,4,3.

Cylinders 1,3,5 and 7 are the left bank.

Cylinder 2,4,6 and 8 are the right bank.
With the engine in the number one firing position, tighten the following valve rocker arm bolts:
Tighten:
- Tighten the cylinders 1,2,7 and 8 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
- Tighten the cylinders 1,3,4 and 5 intake valve rocker arm bolts to 30 N.m (22 lb ft).
Rotate the crankshaft 360 degrees.
Tighten the following valve rocker arm bolts:
Tighten:
- Tighten the cylinders 3, 4, 5 and 6 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
- Tighten the cylinders 2, 6, 7 and 8 intake valve rocker arm bolts to 30 N.m (22 lb ft).
Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left or Valve Rocker Arm Cover Replacement - Right .