TSB 93-3-16: Wheels - Sealing Leaking Cast Aluminum

Details

Bulletin Number: 93-3-16 Reference Number: 393504 Publish Date: 7/93 Subject: LEAKING CAST ALUMINUM WHEELS (REPAIR WITH ADHESIVE SEALANT) Models Affected: 1985-1993 ALL MODELS 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