Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Wheels: All Technical Service Bulletins
Wheels - Sealing Leaking Cast Aluminum
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
