Grand Prix V6-3.8L SC VIN 1 (1997)
Brake Rotor/Disc: Service and Repair
Unit Repair
Front Disc Brakes
Following are two recommended procedures that achieve adequate results using two different off-vehicle disc brake lathes. If any other lathe is used,
follow that lathe's instructions and recommendations.
AMMCO(R) BRAKE LATHE
Refer to the manufacturer instructions for all initial setup and cutting procedures.
ACCU TURN(R) BRAKE LATHE
GM Dealer Equipment (one Cut Refinishing Procedure)
Refer to the manufacturer instructions for all initial setup and cutting procedures.
Nondirectional Finishing
It is very important that the rotor surface be made nondirectional by dressing the rotor surfaces with a sanding disc tool such as Ammco(R) 8750
Safe Swirl Disc Rotor Grinder, Accu Turn(R) 433179 Non-Directional Swirl Finisher, or equivalent, using 120 grit aluminum oxide sandpaper.
Sand each rotor surface with moderate pressure for a minimum of 60 seconds. If the brake lathe is not equipped with an adequate nondirectional
finishing tool, an alternate method is to use a sanding block with 150 grit aluminum oxide sandpaper. With the rotor turning at the equipment
manufacturer's highest recommended cutting speed, sand each rotor surface for a minimum of 60 seconds using moderate pressure. After the rotor
has been sanded, clean each surface with denatured alcohol or a suitable brake cleaner.
The finished rotor surface should be as close to that of a new rotor as possible. Failure to obtain the best possible rotor finish may affect braking
performance.
Refinishing Brake Rotors
Following are two recommended procedures that achieve adequate results using two different off-vehicle brake lathes (Ammco(R) Brake Lathe and Accu
Turn(R) Brake Lathe). If any other lathe is used, follow that lathe's instructions and recommendations.
NOTICE: Do not refinish parking brake drum surface of rotor. Refinishing will result in reduced performance of parking brake.
AMMCO(R) BRAKE LATHE
Refer to the manufacturer instructions for all initial setup and cutting procedures.
ACCU TURN(R) BRAKE LATHE
GM Dealer Equipment (one Cut Refinishing Procedure)
Refer to the manufacturer instructions for all initial setup and cutting procedures.
Nondirectional Finishing
It is very important that the rotor surface be made nondirectional by dressing the rotor surfaces with a sanding disc tool such as Ammco(R) 8750
Safe Swirl Disc Rotor Grinder, Accu Turn(R) 433179 Non-Directional Swirl Finisher, or equivalent, using 120 grit aluminum oxide sandpaper.
Sand each rotor surface with moderate pressure for a minimum of 60 seconds. If the brake lathe is not equipped with an adequate nondirectional
finishing tool, an alternate method is to use a sanding block with 150 grit aluminum oxide sandpaper. With the rotor turning at the equipment
manufacturer's highest recommended cutting speed, sand each rotor surface for a minimum of 60 seconds using moderate pressure. After the rotor
has been sanded, clean each surface with denatured alcohol or a suitable brake cleaner.
The finished rotor surface should be as close to that of a new rotor as possible. Failure to obtain the best possible rotor finish may affect braking
performance.
Rotor Mounting Adapter
