REPAIR OF ENGINE OIL LEAKS FROM UPPER TO LOWER CRANKCASE. Cadillac Concours 1995

SUBJECT: REPAIR OF ENGINE OIL LEAKS FROM UPPER TO LOWER CRANKCASE JOINT (SERVICE PROCEDURE)

MODELS: 1993 CADILLAC ALLANTE 1994-96 CADILLAC CONCOURS, ELDORADO, SEVILLE 1995-96 OLDSMOBILE AURORA 1996 CADILLAC DEVILLE WITH 4.0L AND 4.6L ENGINE (VINS C,Y,9 - RPOS L47, LD8, L37)

CONDITION:

SOME ENGINES MAY EXHIBIT ENGINE OIL LEAKS ALONG THE UPPER TO LOWER CRANKCASE JOINT.

CAUSE:

THIS CONDITION MAY BE CAUSED BY SCRATCHES, NICKS AND IMPERFECTIONS IN THE UPPER AND/OR LOWER CRANKCASES.

CORRECTION:

TO CORRECT OIL LEAKS IN THESE AREAS, USE THE FOLLOWING PROCEDURE:

1. DISASSEMBLE ENGINE AS NECESSARY USING SERVICE MANUAL PROCEDURES TO REPLACE UPPER TO LOWER CRANKCASE SEAL.

2. THOROUGHLY CLEAN THE ENTIRE UPPER AND LOWER CRANKCASE SEAL JOINT WITH BRAKE CLEANER OR SUITABLE EQUIVALENT CLEANER.

3. THOROUGHLY AIR DRY THE ENTIRE UPPER AND LOWER CRANKCASE SEAL JOINT WITH SHOP AIR (20 PSIG MAXIMUM PRESSURE).

4. APPLY A THIN BEAD OF GM GASKET MAKER (P/N 1052942) PARALLEL TO THE SEAL RUNNING THROUGH THE CENTERLINE OF THE BOLT HOLES, BUT NOT THROUGH THE BOLT HOLES. STARTING FROM THE FRONT OF THE BLOCK, THE BEAD SHOULD BE ABOUT 1 MM THICK UNTIL THE FIRST BOLT HOLE AND EXPAND TO 2.5 TO 3 MM THICK FROM THE FIRST TO THE THIRD BOLT HOLE. AFTER THE THIRD BOLT HOLE, THE BEAD SHOULD BE REDUCED TO 1 MM UNTIL RUNNING OFF THE END OF THE CRANKCASE. DO NOT CONTINUE THE BEAD ALL THE WAY TO THE REAR MAIN SEAL. (SEE DIAGRAM FOR GASKET MAKER APPLICATION BELOW.)

5. INSTALL LEFT AND RIGHT UPPER TO LOWER CRANKCASE SEALS.

6. REASSEMBLE ENGINE AS NECESSARY USING SERVICE MANUAL PROCEDURES, TORQUING ALL FASTENERS TO SPECIFICATION.

EXCHANGES FOR THIS CONDITION SHOULD BE REPAIRED, REQUESTS FOR ENGINE EXCHANGES WILL BE DENIED.

FOR ADDITIONAL DETAILS REGARDING THE ENGINE EXCHANGE PROGRAM, PLEASE SEE BULLETIN 57-61-31.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

1995-96 OLDSMOBILE G

LABOR LABOR OPERATION DESCRIPTION TIME

J1190 SEAL, LOWER CRANKCASE-REPLACE 9.2 ADD TO RECOVER/RECHARGE A/C SYSTEM 0.7 ADD W/LOCKING WHEEL COVERS/NUTS (ONE OR ALL) 0.1 ADD TO CLEAN PARTS ON VEHICLES OVER 30,000 MILES/48,000 KILOMETERS IF NECESSARY 0.2

1993-95 CADILLAC E, K, KD, KF AND V

LABOR LABOR OPERATION DESCRIPTION TIME

J1190 SEAL, LOWER CRANKCASE-REPLACE 11.4 ADD TO RECOVER/RECHARGE A/C SYSTEM 0.7 ADD W/LOCKING WHEEL COVERS/NUTS (ONE OR ALL) 0.1 ADD TO CLEAN PARTS ON VEHICLES OVER 30,000 MILES/48,000 KILOMETERS IF NECESSARY 0.2

FIGURES: 1 ATTACHMENTS: 0

Object Number: 52090 Size: SH

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.