Installation Procedure

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: 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: Proper Installation Of Valve Rocker Arm Support

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3. Apply prelube GM P/N 12345501 or equivalent to the following valve rocker arm contact surfaces:
   • Valve pushrod socket (1)
   • Roller pivot (2)
   • Valve stem tip (3)
   Fig 3: Valve Rocker Arm Components

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   NOTE: Refer to FASTENER NOTICE .
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: Valve Rocker Arm Bolt Locations

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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).

   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).

7. Install the valve rocker arm cover. Refer to the appropriate procedure:
   • Valve Rocker Arm Cover Replacement - Left 
   • Valve Rocker Arm Cover Replacement - Right 
   Fig 5: Crankshaft Balancer Alignment Mark & Engine Front Cover Alignment Tab

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