REAR BRAKE NOISE DURING LIGHT BRAKING (REFINISH BRAKE DRUMS). Saturn Saturn 1991

For 1990-2009 cars

# REAR BRAKE NOISE DURING LIGHT BRAKING (REFINISH BRAKE DRUMS)

#### SUBJECT: Rear Brake Noise During Light Braking (Refinish Brake Drums) - 1991 Saturns - Equipped with Base Brakes - Built Before 12/90

#### NOTE: For build date refer to the Certification Label, located on the driver's door lock pillar.

CONDITION: Rear brake noise during light braking conditions. (Complaint Noise Code - N06, Clicking/Ticking)

CAUSE: Brake drum surface finish machined with a "threaded" grooved pattern. This surface finish forces the brake shoe and lining to ride outboard away from the backing plate during light brake application. The hold-down spring pulls the brake shoe and lining inboard causing the brake shoe to strike against the backing plate.

#### CORRECTIVE ACTION:

Recondition the drum surface according to the following procedures.

#### CAUTION:

MAKE SURE VEHICLE IS PROPERLY SUPPORTED AND SQUARELY POSITIONED ON HOIST. TO HELP AVOID PERSONAL INJURY, PROVIDE ADDITIONAL SUPPORT TO THE OPPOSITE END OF THE VEHICLE THAT COMPONENTS WILL BE REMOVED FROM.

1. Raise the vehicle on a hoist.

2. Remove rear wheels.

3. Remove brake drums from vehicle.

4. Inspect brake drums, if either of the brake drums have a "threaded" groove, resurface brake drums,

5. Mount the brake drum to a brake lathe.

#### CAUTION:

WHEN USING THE BRAKE LATHE, FOLLOW THE MANUFACTURER'S SAFETY PRECAUTIONS AND BE SURE TO WEAR PROTECTIVE GLOVES AND EYE PROTECTION WHILE PERFORMING THIS OPERATION.

6. While the lathe is rotating the drum, use 80 grit sandpaper to resurface the brake drum.

#### IMPORTANT: Use an inboard/outboard sanding motion. This motion will put a multi-directional surface finish on the brake drum.

7. Inspect brake drum surface. If the groove pattern is still present, repeat Step 6.

8. Install brake drums.

#### NOTICE: Before installing wheels, remove rust or corrosion from wheel mounting surfaces and brake drums. Failure to do so can cause wheel lug nuts to loosen in service.

9. Position wheel onto hub.

10. Install wheel nuts and tighten in a crisscross pattern. Repeat tightening pattern to be sure torque is correct.

TORQUE: 140 N-m (103 lbs. ft.)

11. Lower vehicle from hoist.

12. Road test vehicle to verify that condition has been corrected.

CLAIM INFORMATION To receive credit for this repair, submit a claim through the Saturn Dealer System as follows:

Case Labor Type Description Code Time --- ------------------- ----- -------- VW Resurface Rear Drum T9518 0.9 HRS

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.