For 1990-2009 cars

# CAST ALUMINUM WHEEL POROSITY REPAIR AND SEALER REVISED

#### MODELS AFFECTED: 1982-1988 CIMARRONS 1985-1989 DE VILLES AND FLEETWOODS 1986-1989 ELDORADOS AND SEVILLES 1987-1989 ALLANTES

Some vehicles with cast aluminum wheels may experience a condition of a slow leak. This may be caused by a porous wheel.

To repair this condition use 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 dismount tire from wheel.

4. Scuff inside rim surface at leak area with #80 grit paper, and clean area with general purpose cleaner 3MO8984 or equivalent.

5. Apply 1/8" thick layer of Dow Corning Silastic 732 RTV, P/N 1052366 or equivalent, to leak area and allow six hours to dry.

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 tire or sealer.

7. Adjust tire pressure to meet specifications.

8. Balance wheel and tire assembly using nylon coated wheel weights.

9. Water test wheel/tire again.

10. Reinstall wheel/tire assembly on car.

For warranty purposes use Labor Operation T3032 at .6 hour.

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.