GM Corvette 1963-1982 Repair Guide

Calipers

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REMOVAL & OVERHAUL



See Figures 1 through 6

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Fig. Fig. 1: Exploded view of the four-piston caliper assembly-1982 vehicle shown, others similar



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Fig. Fig. 2: Remove and discard the cotter pin(s) from the end of the pad retaining pin



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Fig. Fig. 3: It may be necessary to use a small punch and a hammer to carefully tap out the brake pad retaining pin



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Fig. Fig. 4: After removing the brake pads, lift the caliper assembly off of the brake rotor (disc)



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Fig. Fig. 5: If the caliper is NOT being removed for replacement or overhaul, suspend the caliper with a suitable piece of wire



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Fig. Fig. 6: If the rotor requires replacement, remove the rotor and hub from the spindle. The rivets retaining the rotor to the hub must be drilled out

  1. With the vehicle securely raised and its wheels removed, disconnect the front caliper brake hose at its support bracket and the rear unit line from the inside caliper.
  2.  
  3. Tape the open end of each line to prevent dirt from entering.
  4.  
  5. Pull the cotter pins, retaining pins, and brake pads, and unbolt the caliper from its mounting bracket.
  6.  
  7. Remove the two large bolts and split the caliper case.
  8.  
  9. Remove the fluid transfer hole O-rings.
  10.  
  11. The pistons are retained by ring-like boots. To remove them, fully depress the pistons and, with a prytool, lever the boots from their seats. Remove the pistons, springs, and seals, using air pressure if necessary.
  12.  
  13. Clean all parts with non-mineral based solvent and compressed air, and replace the rubber parts with those in the brake service kit.
  14.  
  15. Inspect the piston bores for damage or corrosion. Polish corroded bores with crocus cloth and, if this is not enough, replace the caliper. Replace all self-locking bolts.
  16.  
  17. Maintain the proper caliper piston-to-bore clearance as indicated in the chart.
  18.  
  19. Reverse the disassembly procedure to reassemble. Lubricate parts with brake fluid.
  20.  

Remember, when positioning the piston seal on the piston, that it goes in the groove nearest the piston flat end with the lap facing the largest end. If placement is correct, the seal lips will be in the groove and not extend over the groove step. Bleed the brake system after installation.

 
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