How to Adjust Brake Pedal Height in a Chevy Corvette

If your Chevy Corvette's brake pedal has too much freeplay, you may want to adjust the pedal height. Often people jump to the conclusion that the problem is something much more expensive than a simple adjustment of the brake pedal and they put on new pads, lines or jump to other expensive options.

Instructions

1

Bleed the line. You need to make sure that your brake line doesn't have air in it before you adjust the brake pedal height in your Corvette. This makes the pedal mushy also.

2

Turn off the car before attempting to test the freeplay in the pedal. Pump the pedal a couple of times to remove any booster vacuum assist. Use two fingers and apply pressure on the brake pedal. This requires about 2 lbs. of force and allows you to feel linkage problems from the clevis pin. After that, you feel the freeplay in the pedal. The master cylinder pressure stops the movement.

3

Note the distance at the start of free play by putting a ruler next to the pedal. Depress the pedal to the end of the free play and note that measurement. Subtract the second measurement from the first. You need about 1/8 inch of freeplay. Any more or less than that requires some adjustment.

4

Follow the brake pedal to the point that it attaches to the push rod that goes into the master cylinder. Mark the bottom of the push rod with white correctional fluid so you have a reference point.

5

Loosen the locking nut on the brake booster adjustment rod. This should be a turn to the left. Use a flare wrench to do this. If the push rod turns, use the dot to reference it back to the original position.

6

Turn the push rod with pliers. When you turn it to the left it tightens the pedal and has less freeplay. A turn to the right loosens the pedal and gives more freeplay. Use the white dot as a reference.

7

Tighten down the locking nut. Test the freeplay with your hand after you adjusted the brake pedal in your Chevy Corvette. Take a short ride around the block to make sure you have the right feel in the brake pedal.