OIL LEAKS FROM OIL PAN TO LOWER CRANKCASE. Cadillac Eldorado 1995

SUBJECT: OIL LEAKS FROM OIL PAN TO LOWER CRANKCASE ATTACHING BOLTS (CLEAN BOLT/APPLY SEALANT)

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

CONDITION:

SOME ENGINES MAY EXHIBIT ENGINE OIL LEAKS SOURCED AT OIL PAN TO LOWER CRANKCASE ATTACHING BOLTS AND BOLTS ATTACHING THE BRACE BETWEEN THE TRANSAXLE AND ENGINE OIL PAN.

CAUSE:

THIS CONDITION MAY BE CAUSED BY POROSITY IN THE LOWER CRANKCASE AREA NEAR THE OIL PAN BOLT THREADS. THIS TYPE OF LEAK WOULD SHOW OIL LEAKING AT OR NEAR THE HEAD OF THE FASTENER AFFECTED.

CORRECTION:

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

1. REMOVE THE BOLT WHICH IS LEAKING. 2. THOROUGHLY CLEAN THE BOLT HOLE WITH BRAKE CLEAN OR SUITABLE EQUIVALENT CLEANER. 3. THOROUGHLY BLOW OUT BOLT HOLE WITH SHOP AIR (20 PSIG MAXIMUM PRESSURE). 4. THOROUGHLY CLEAN THE BOLT WITH BRAKE CLEANER OR SUITABLE EQUIVALENT CLEANER. 5. APPLY A MODERATE AMOUNT OF LOCTITE(R), P/N 12345382 (BLUE SERVICE REMOVABLE) THREADLOCKER/SEALANT TO BOLT. 6. INSTALL BOLT AND TORQUE TO 9.5 N.M (85 LB IN).

ENGINES PREVIOUSLY RETURNED THROUGH THE ENGINE EXCHANGE PROGRAM FOR THIS TYPE OF LEAK SHOULD INSTEAD BE REPAIRED USING THIS PROCEDURE.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME

T2485 LEAK, OIL PAN TO LOWER CRANKCASE 0.4 ATTACHING BOLT-REPAIR

ADD TO RESEAL EACH ADDITIONAL (2) BOLTS 0.1 NOTE: TOTAL ADD TIME NOT TO EXCEED 0.6 OF AN HOUR.

FIGURES: 0 ATTACHMENTS: 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.