Oil Leak at the Rocker Cover

File In Section: 6 - Engine

Bulletin No.: 47-61-35

Date: October, 1994

Subject:
Oil Leak at the Rocker Cover (Replace both Composite Covers with New Aluminum Cover)

Models:

1994-95		Buick Century, Regal, Skylark
1994-95		Chevrolet Beretta, Corsica
1995		Chevrolet Lumina, Monte Carlo
1993		Oldsmobile Cutlass Supreme
1994-95		Oldsmobile Achieva, Ciera, Cutlass Supreme
1994-95		Pontiac Grand Am, Grand Prix with 3100 Engine (VIN M - RPO L82)

Condition

Some vehicles with composite rocker covers may experience an engine oil leak at either the left or right rocker cover.

Correction

Several conditions may contribute to component interactions. To reduce system sensitivity, a new rocker cover has been designed to address a variety of potential causes simultaneously. The original rocker cover was produced from a composite material; the new cover will be aluminum. In the interest of customer satisfaction and the desire to maintain a uniform underhood appearance, the aluminum rocker covers should be installed in pairs. The composite rocker will no longer be available from GMSPO. Before any repair is made, follow normal diagnostics as outlined in the appropriate vehicle Service Manual, Section 6A. If the oil leak is determined to be from the composite rocker cover, follow the service repair procedure as outlined in Section 6A5 of the Service Manual. Remember to check for oil leaks after the repair is made.

Parts Information

Description		Part Number
Right Rocker Cover		24504670
Left Rocker Cover		24504669

When ordering a rocker cover assembly, the gasket is included.

Note:
If the engine has composite rocker covers, it is suggested that both rocker covers be replaced to retain a uniform underhood appearance.

Parts are currently available from GMSPO.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation	Description	Labor Time
J0307	Cover and/or Gasket, Rocker— Replace, both Banks	Use published labor operation time.