Honda Accord/Prelude 1984-1995 Repair Guide

Brake Disc (Rotor)

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REMOVAL & INSTALLATION



See Figures 1 and 2

  1. If equipped with an air bag, disconnect the negative battery cable and properly disable the Supplemental Restraint System (SRS), as detailed in Chassis Electrical .
  2.  
  3. Loosen the lug nuts, then Raise and safely support the vehicle on jackstands.
  4.  
  5. Remove the rear wheel.
  6.  
  7. Remove the rear brake caliper and mounting bracket.
  8.  
  9. Remove the hub center cap.
  10.  
  11. On 1984-87 Preludes and 1984-85 Accords, remove the cotter pin, holder and spindle nut. On other models, remove the screws securing the rotor to the hub assembly.
  12.  



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Fig. Fig. 1: Rear disc assembly used on 1984-85 Accords and 1984-87 Preludes



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Fig. Fig. 2: Rear disc removal on 1986-95 Accords and 1988-95 Preludes

To install:
  1. On 1984-87 Preludes and 1984-85 Accords, apply a light coat of grease or oil to the spindle nut and the spindle threads. Install the washer and spindle nut. Adjust the wheel bearing; refer to the procedure outlined in Suspension & Steering . On other models, secure the disc with its retaining screws.
  2.  
  3. Install the caliper.
  4.  
  5. Install the wheel and lower the vehicle to the ground.
  6.  
  7. If equipped, enable the SRS system and connect the negative battery cable.
  8.  

INSPECTION



See Figures 3 and 4

  1. The brake disc develops circular scores during braking due to trapped dust and road grit. Excessive scoring not only contributes to squealing brakes but also shortens the life of the brake pads. However, light scoring of the disc surface, not exceeding 0.38mm in depth, will result from normal use and is not detrimental to brake operation. In general, if the scoring is deep enough to catch a fingernail passing over it, it's too deep and requires corrective action.
  2.  
  3. Disc run-out is the movement of the disc from side-to-side; warpage or distortion. Excess run-out causes wobble or pounding in the brake pedal. Position a dial indicator in the middle of the pad wear area and turn the disc, while checking the indicator. If disc run-out exceeds 0.004 in. (0.10mm), replace or refinish the disc.
  4.  
  5. Disc parallelism is the measurement of variations in disc thickness at several locations on the disc circumference. It indicates whether or not the two faces of the disc are true and parallel. To measure parallelism, place a mark on the disc and measure the disc thickness with a micrometer. Repeat this measurement at eight (8) equal increments (about 45 degrees apart) on the circumference of the disc. If any of the measurements vary more than 0.0006 in. (0.015mm), replace the disc.
  6.  



Click image to see an enlarged view

Fig. Fig. 3: Measuring the brake disc run-out



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Fig. Fig. 4: Use a micrometer to measure the thickness and check for parallelism

 
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