For 1990-2009 cars

# OIL LEAK AT THE ROCKER COVER

#### SUBJECT: OIL LEAK AT THE ROCKER COVER (REPLACE BOTH COMPOSITE COVERS WITH NEW ALUMINUM COVER)

#### MODELS: 1994-95 BUICK CENTURY, REGAL AND SKYLARK 1994-95 CHEVROLET BERETTA AND CORSICA 1995 CHEVROLET LUMINA AND MONTE CARLO 1994-95 OLDSMOBILE ACHIEVA, CIERA AND CUTLASS SUPREME 1993 OLDSMOBILE CUTLASS SUPREME 1994-95 PONTIAC GRAND AM AND 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 EXPECTED TO BE AVAILABLE FROM GMSPO OCTOBER 3, 1994.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE: LABOR OPERATION: J0307 - COVER AND/OR GASKET, ROCKER - REPLACE, BOTH BANKS USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1994. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.