SC L4-1.9L DOHC VIN 7 (1991)
Brake Drum: All Technical Service Bulletins
Brakes (Rear) - Clicking Noise During Light Braking
NO.:
91-T-07
DATE:
April, 1991
GROUP:
Chassis
CORP. NO.:
185001
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.
PROCEDURE: 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 pattem 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:
