Honda Accord/Prelude 1984-1995 Repair Guide

Brake Disc (Rotor)

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REMOVAL & INSTALLATION



Except 1990-95 Accord

See Figures 1, 2 and 3

  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 wheels.
  6.  
  7. Remove the two 6mm screws from the brake disc.
  8.  



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Fig. Fig. 1: Remove the two 6mm screws securing the brake disc

  1. Disconnect the caliper from the caliper bracket. Support the caliper out of the way with a length of wire. Do not allow the caliper to hang from the brake hose.
  2.  
  3. Remove the caliper bracket.
  4.  



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Fig. Fig. 2: Remove the bolt and guide pin from the caliper bracket, then remove the bracket

  1. Remove the brake disc. If the brake disc is difficult to remove, install two 8mm bolts into the threaded holes and tighten them evenly and alternately to prevent cocking the rotor.
  2.  



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Fig. Fig. 3: Remove the brake disc from the caliper assembly

  1. Installation is the reverse of the removal procedure.
  2.  
  3. If equipped, enable the SRS system and connect the negative battery cable.
  4.  

1990-95 Accord

See Figures 4 and 5

  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 wheels.
  6.  
  7. Remove the steering knuckle from the vehicle. Please refer to Suspension & Steering for procedures.
  8.  
  9. Remove the 4 bolts retaining the hub unit to the steering knuckle and remove the hub unit.
  10.  



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Fig. Fig. 4: Remove the 4 bolts retaining the hub unit to the steering knuckle and remove the hub unit/rotor assembly

  1. Remove the 4 bolts, then separate the hub unit from the brake rotor.
  2.  



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Fig. Fig. 5: Remove the 4 bolts, then separate the hub unit from the brake rotor

To install:
  1. Assemble the disc to the hub unit and tighten the bolts to 40 ft. lbs. (55 Nm).
  2.  
  3. When installing the hub to the knuckle, use new self-locking bolts and tighten them to 33 ft. lbs. (45 Nm).
  4.  
  5. Install the steering knuckle.
  6.  
  7. Lower the vehicle and check for proper brake operation.
  8.  
  9. If equipped, enable the SRS system and connect the negative battery cable.
  10.  

INSPECTION



See Figures 6 and 7

  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 0.015 in. (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; caused by 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. 6: Measuring brake disc run-out using a dial indicator



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Fig. Fig. 7: Use a micrometer to measure the thickness and to check for parallelism

 
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