For 1990-2009 cars

# LEAKING CAST ALUMINUM WHEELS (REPAIR WITH ADHESIVE SEALANT)

SHOULD A VEHICLE EQUIPPED WITH CAST ALUMINUM WHEELS EXHIBIT A SLOW LEAK DUE TO A POROUS CONDITION EXISTING IN THE WHEEL, THE WHEEL CAN BE REPAIRED BY USING DOW CORNING SILASTIC 732 RTV, P/N 1052366 OR EQUIVALENT, AS DESCRIBED IN THE FOLLOWING PROCEDURE:

1. REMOVE TIRE-WHEEL ASSEMBLY FROM VEHICLE. 2. LOCATE LEAKING AREA BY INFLATING TIRE TO 40 PSI AND DIPPING TIRE-WHEEL ASSEMBLY IN WATER BATH. 3. IF AIR BUBBLES ARE OBSERVED, MARK LEAK AREA AND REMOVE TIRE FROM WHEEL. 4. SCUFF INSIDE RIM SURFACE AT LEAK AREA WITH #80 GRIT PAPER AND CLEAN AREA WITH GENERAL PURPOSE CLEANER, SUCH AS 3M #08984. 5. APPLY 1/8" THICK LAYER OF ADHESIVE/SEALANT TO LEAK AREA ON INSIDE OF RIM AND ALLOW SIX HOURS OF DRYING TIME. 6. MOUNT TIRE ON WHEEL, PRESSURIZING TO 40 PSI AND CHECK FOR LEAKS.

#### NOTICE: CAUTION MUST BE USED WHEN MOUNTING THE TIRE SO AS NOT TO DAMAGE THE SEALER.

7. ADJUST TIRE PRESSURE TO MEET PLACARD SPECIFICATION. 8. BALANCE TIRE-WHEEL ASSEMBLY, USING PROPER COATED WEIGHTS. 9. WATER TEST WHEEL AGAIN. 10. REINSTALL TIRE-WHEEL ASSEMBLY ON VEHICLE.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION LABOR OPERATION NUMBER: E0420

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 1993 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.