Toyota Celica/Supra 1971-1985 Repair Guide

Brake Disc (Rotor)



  1. Unfasten the two torque plate mounting bolts, then remove the brake pads and caliper assembly, as detailed earlier in this section.
  3. Suspend the caliper so that its hose is not stretched.
  5. Pull off the brake disc.
  7. Installation is the reverse of the removal procedure. Be sure to align align the groove on the rear axle shaft flange with the service hole on the disc.


Examine the disc. If it is worn, warped or scored, it must be replaced. Check the thickness of the disc against the specifications given in the Brake Specifications chart. If it is below specifications, replace it. Use a micrometer to measure the thickness.

Disc run-out should be measured before the disc is removed and again, after the disc is installed. Use a dial indicator mounted on a stand, and position the pointer 0.39 inch (10mm) from the edge of the disc. If run-out exceeds 0.006 inch (0.15mm), replace the disc.

Be sure that the wheel bearing nut is properly tightened. If it is not, an inaccurate run-out reading may be obtained. If different run-out readings are obtained with the same disc, between removal and installation, this is probably the cause.