Valve Rocker Arm and Push Rod: Installation

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

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

Install the valve pushrods.

Fig 1: Installing Valve Pushrods
Courtesy of GENERAL MOTORS CORP.

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

Fig 2: Installing Valve Rocker Arm Supports
Courtesy of GENERAL MOTORS CORP.
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: Valve Pushrod Socket, Roller Pivot & Valve Stem Tip
Courtesy of GENERAL MOTORS CORP.
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.
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 .

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

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

Fig 5: Aligning Crankshaft Balancer Alignment Mark With Engine Front Cover Alignment Tab
Courtesy of GENERAL MOTORS CORP.