Wheels - Cast Aluminum Wheel Porosity Repairs

89pontiac01

Bulletin Number: 89-3-7
Reference Number: 783505R
Publish Date: 1/89
Subject: CAST ALUMINUM WHEEL POROSITY (REPAIR PROCEDURE AND SEALER P/N LISTED)

Models

Affected: ALL MODELS WITH ALUMINUM WHEELS
"This bulletin supersedes bulletin 87-3-13, dated 3/87. This bulletin has been revised to change the PSI from 50 to 40, to clarify Step #8, and to add the 1989 model year."


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: T3032
Labor Time : .6 hours
Trouble Code : 92