Valve Rocker Arm and Push Rod Installation

Important:  Be sure to keep parts in order. Parts must be reinstalled into the original location and position.

1. Install the valve pushrods.
   Fig 1: Installing Valve Pushrods

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   Important:  Be sure that the arrow on the valve rocker arm support is in the up position.

2. Install the valve rocker arm supports.
   Fig 2: Installing Valve Rocker Arm Supports

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3. Apply prelube GM P/N 12345501 (Canadian P/N 992704) or equivalent, to the following valve rocker arm contact surfaces:
   • Valve pushrod socket (1)
   • Roller pivot (2)
   • Valve stem tip (3)
     Fig 3: Installing Pushrod Socket, Roller Pivot, & Valve Stem Tip

     Courtesy of GENERAL MOTORS CORP.
4. Install the valve rocker arm assemblies as follows:
   1. 4.1. Finger start the bolt at location (1)
   2. 4.2. Finger start the bolt at location (2)
   3. 4.3. Finger start the bolt at location (3)
   4. 4.4. Finger start the remaining valve rocker arm bolts
      Fig 4: Installing Valve Rocker Arm Assemblies

      Courtesy of GENERAL MOTORS CORP.
5. Rotate the crankshaft balancer to position the crankshaft balancer alignment mark (1) 57-63 degrees clockwise or counterclockwise from the engine front cover alignment tab (2).
   NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

   Important:  Once the valve rocker arm assemblies are installed and properly torqued, no additional valve lash adjustment is required.

6. Tighten the valve rocker arm bolts.

   Tighten 

   Tighten valve rocker arm bolts to 30 N.m (22 lb ft).

   Fig 5: Aligning Crankshaft Balancer

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