Wheels - Air Leak, Cast Aluminim Wheel Porosity
89chevy09Number: 89-59-3E section: 3E
Date: JAN., 1989
Subject: CAST ALUMINIM WHEEL POROSITY
Model and Year: ALL MODELS WITH CAST ALUMINUM WHEELS
TO: ALL CHEVROLET DEALERS
This bulletin cancels and replaces Dealer Service Bulletin 87-89 (Section 3E) dated March, 1987, to expand model year application through 1989 vehicles. All copies of 87-89 should be discarded.
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, part number 1052366 or equivalent, as described in the following procedure:
1. Remove wheel and tire assembly from car.
2. Locate leaking areas by inflating tire to 40 PSI and dipping wheel-tire assembly into water bath.
3. Mark leak areas 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 or equivalent.
5. Apply 1/8" thick layer of adhesive/sealant to leak area and allow six hours of drying time.
6. Mount tire on wheel, pressurize 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 specifications.
8. Balance wheel and tire assembly using nylon coated wheel weights.
9. Water test wheel again.
10. Reinstall wheel-tire assembly on car.
WARRANTY INFORMATION
Labor Operation Number: T3032
Time Allowance: .6 hours
Trouble Code: 92