Operation CHARM: Car repair manuals for everyone.

Gravity Bleeding

CAUTION:
^ Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled onto a painted or plastic surface, immediately wash it with water.

NOTES:
^ When any part of the hydraulic system has been disconnected for service or replacement, air may enter the system causing a spongy pedal action. Bleed the hydraulic system after it has been properly connected to make sure that all air is expelled.
^ When a new brake master cylinder has been installed or the brake system has been emptied or partially emptied, fluid may not flow from the bleeder screws during normal bleeding. It may be necessary to prime the system using the following procedure.
^ If any of the brake tubes or calipers have been removed, it may be helpful to prime the system by gravity bleeding it. This should be done after the brake master cylinder is primed and bled.

PROCEDURE
1. Fill the brake master cylinder reservoir with new High Performance DOT-3 Motor Vehicle Brake Fluid.
2. Loosen both rear caliper bleeder screws and leave them open until clear brake fluid flows out. Do not let brake master cylinder reservoir run dry, check it often.
3. Tighten the bleeder screws.
4. One at a time, loosen the front caliper bleeder screws. Leave the bleeder screws open until clear fluid flows out. Do not let brake master cylinder reservoir run dry, check it often.
5. Tighten the bleeder screws to 8-20 Nm (71-177 inch lbs.).
6. After the brake master cylinder has been primed, the lines bled at the brake master cylinder and the brake system gravity bled, normal brake system bleeding can resume at each wheel.