Installation Procedure

WARNING: This page is about a different variant/trim than selected.

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

Fig 1: View Of Valve Pushrods

GM480529

Courtesy of GENERAL MOTORS CORP.

Install the pushrods.

Fig 2: Valve Rocker Arm Supports

GM480578

Courtesy of GENERAL MOTORS CORP.

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

Install the rocker arm supports.

Fig 3: Pushrod Socket, Roller Pivot & Valve Stem Tip

GM480551

Courtesy of GENERAL MOTORS CORP.

Apply lubricant GM P/N 12345501, (Canadian P/N 992704), or equivalent to the following rocker arm contact surfaces:
- Pushrod socket (1)
- Roller pivot (2)
- Valve stem tip (3)

Fig 4: Valve Rocker Arm Assemblies

GM480580

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the rocker arms as follows:
1. Finger start the bolt at location (1)
2. Finger start the bolt at location (2)
3. Finger start the bolt at location (3)
4. Finger start the remaining rocker arm bolts

Fig 5: View Of Crankshaft Balancer Alignment Mark & Engine Front Cover Alignment Tab

GM334551

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).

IMPORTANT: Once the rocker arms are installed and properly torqued, no additional valve lash adjustment is required.

Tighten the rocker arm bolts.
Tighten: Tighten bolts to 30 N.m (22 lb ft).
Install the rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left or Valve Rocker Arm Cover Replacement - Right