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: 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: Valve Rocker Arm Supports & Installation Markings

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

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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 Assembly Sequence

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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).
   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: Crankshaft Balancer Alignment Mark & Front Cover Alignment Tab

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