Chevrolet Cobalt Service & Repair Manual: Brake Rotor Deglaze
| Caution: Whenever the brake
rotor has been separated from the wheel bearing flange, clean any rust or
foreign material from the mating surface of the rotor and flange with a
suitable hub cleaning kit. Failure to do this may result in increased lateral
runout of the rotor and brake pulsation. |
| Caution: Improperly tightened
wheel bolts or nuts can lead to brake pulsation and rotor damage. In order
to avoid expensive brake repairs, evenly tighten the wheel bolts or nuts
to the proper torque specification. |
| 1. |
Remove tire and wheel assembly. |
| 3. |
Refinish the brake rotors if one or
more of the following conditions exist: |
| |
a. |
Brake rotor thickness variation in
excess of .001 inch. |
| |
b. |
Corrosion or pitting that is deeper
than the rotor braking surface. |
| |
c. |
Scoring of the rotor braking surface
with a groove depth in excess of .060 inch. |
| 4. |
Use a micrometer in order to measure
the thinnest point of the brake rotor. If the thinnest point of
the brake rotor exceeds the brake rotor minimum thickness, do NOT
refinish the brake rotor. Replace the brake rotor. |
| 5. |
Deglaze rotor with a 120 grit aluminum
oxide sandpaper and a non-directional rotor finisher, if available,
to create a non-directional braking surface. |
| 6. |
Clean the braking surfaces with denatured
alcohol or with a suitable brake cleaner. |
| 7. |
Thoroughly clean the rust from the
brake rotor flange. |
| 9. |
Install tire and wheel assembly. |
| 10. |
Burnish pads and rotors as follows: |
| |
a. |
Select a smooth road with little or
no traffic. |
| |
b. |
Accelerate the vehicle to 30 mph. |
| |
c. |
Using moderate to firm pressure, apply
the brakes to bring the vehicle to a stop. Do not allow the brakes
to lock. |
| |
d. |
Repeat steps two and three until approximately
20 stops have been completed. Allow sufficient cooling periods between
stops in order to properly deglaze the brake pads and rotors. |
|
Front
1.
Raise and support the vehicle.
2.
Remove the tire and wheel assembly.
3.
Disconnect the front brake pipe ...
Warning: Avoid taking the following
actions when you service wheel brake components: Do not grind brake linings.
Do not sand brake linings. Do not clean wheel brake components with a dr ...
Brake Line R&R
Brake Rotor, Reface