The 1975 Chevrolet Corvette saw the introduction of a catalytic converter, high-energy electronic ignition, and speed indicated in kilometers per hour added to the speedometer. The 1975 Corvette also was the last model with a convertible top option until 1986. Like all Corvettes since 1965, the 1975 Corvette features four-wheel disc brakes with four-piston calipers, having two pistons on each side of the disc applying pressure to both the inner and outer pads. These calipers provide superior braking performance compared to the standard one-piston caliper, which only applies pressure to one pad and uses that same pressure to pull the other pad against the disc.
Tools Used: An assistant, Jack, Jack stands, Safety goggles, Box end wrench, Brake bleeder kit, Shop rags, Brake fluid
Bleed the Brakes
Clean the top of the brake master cylinder with a shop rag. Open the brake master cylinder, and fill the master cylinder with brake fluid if it is low. During the bleeding process, you or your assistant will have to monitor the level of the brake fluid and keep the master cylinder full, because every time you bleed a caliper, the level will go down.
Loosen the lug nuts on the passenger-side rear wheel about one turn. Raise the Corvette with the jack and support with a jack stand. Finish removing the lug nuts and remove the wheel.
Loosen but do not open the bleeder screw on the inside of the right rear caliper. Make sure you have safety goggles on. Attach the bleeder hose. Your bleeder hose kit should have a small plastic bottle that the hose is attached to. Fill the bottle about one-third of the way with brake fluid so that the end of the hose is in the brake fluid.
Instruct your assistant to depress the brake pedal a few times and hold pressure on the pedal. Open the bleeder screw and allow fluid to flow into the bottle. Your assistant needs to maintain pressure on the pedal until you close the bleeder screw. You may notice air bubbles coming into the bottle. This is air in the system.
Check the fluid level in the master cylinder, and refill with fresh brake fluid if necessary. Do not reuse old brake fluid. Repeat the above procedure until no air bubbles are seen exiting the bleeder hose. Close the bleeder screw and move to the outer bleeder screw. Repeat the process until no air bubbles are seen. Close the bleeder screw. Remove the bleeder hose. Replace the wheel. Lower the Corvette and tighten the lug nuts.
Repeat this process in the following order: Driver's side rear caliper, passenger's side front, driver's side front.
Tips & Warnings
Be sure to make sure the bleeder screws are fully closed. Brake fluid is a skin and eye irritant. Wash hands with soap and water after you're done. Brake fluid also has solvent properties and will melt paint. Don't get it on any painted surface.
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