Problems & Fixes

  • Problem: Spongy or Light Pedal
  • Air in rear calipers.
  • Air in lines.
  • Air in front calipers.
  • Rear calipers with parking brake out of adjustment.
  • Pulling piston back too much.
  • Defective caliper.
    • Fix: Rear Disc Brakes...Better Stopping Power using Cadillac/GM Calipers repair tips.
    • Gravity bleed rear calipers.
    • Bleed entire system.
    • Bleed front calipers.
    • Adjust caliper brake arms.
    • Replace caliper.
  • Problem: Brakes Getting Hot (rear only)
  • Residual pressure valve in master cylinder or combination valve causing calipers to drag.
  • Drum system with residual pressure valves for front and rear.
    • Fix: Adjust clearance on pedal push rod so master cylinder returns against its stop.
    • Remove residual valve.
  • Problem: Brakes Getting Hot (front & rear)
  • Master cylinder return hole blocked causing calipers to not retract.
  • Drum system with residual pressure valves for front and rear.
    • Fix: Adjust clearance on pedal push rod so master cylinder returns against it's stop.
    • Remove residual valve for front and rear.
  • Problem: Caliper Mounting screws scrape on top of Rotor
  • Bracket not parallel with rotor.
    • Fix: Check bracket it should be parallel with the rotor. Grind sleeves or bend bracket (as low as possible) until the bracket is parallel.
    • Hold bracket up on it's mounting holes and then tighten bolts.
  • Problem: Brake light on dash comes on
  • Air or leak in either the front or rear brake system.
    • Fix: Bleed the system.
  • Problem: Car pulls to one side or one wheel locks up
  • Brake fluid or grease on pads.
    • Fix: Clean pads or replace.
  • Problem: Pedal lower than you like.
  • Movement to apply calipers makes pedal too low.
    • Fix: Add two pound residuals to either the front, rear or both systems.
  • Problem: Inside pads wearing but not outside pads.
  • Residual valve allowing caliper to open up some but not enough.
  • Problem: Caliper parking brakes don't hold.
  • Parking brake mechanism out of adjustment.
  • Problem: Rear brakes lock up before the front.
  • Not enough proportioning to the front brakes and off of the rear brakes.
    • Fix: Add an adjustable proportioning valve to the rear line to reduce the rear brakes more.
  • Problem: Not enough brakes.
  • Larger and heavier wheels make brakes less effective.
    • Fix: Change to larger rotors in front. bullet Install larger booster. Install master cylinder with smaller bore.