Refer to the ABS bleeding in the ABS section.
If the master cylinder is off the vehicle, it can be bench bled.
- Connect two short pieces of brake line to the outlet fittings, bend them until the free end is below the fluid level in the master cylinder reservoirs.
- Fill the reservoir with fresh brake fluid. Pump the piston slowly until no more air bubbles appear in the reservoirs.
- Disconnect the two short lines, refill the master cylinder and securely install the cylinder caps.
- If the master cylinder is on the vehicle, it can still be bled, using a flare nut wrench.
- Open the brake lines slightly with the flare nut wrench while pressure is applied to the brake pedal by a helper inside the vehicle.
- Be sure to tighten the line before the brake pedal is released.
- Repeat the process with both lines until no air bubbles come out.
- Bleed the complete brake system.
CALIPERS AND WHEEL CYLINDERS
If using a pressure bleeder, follow the instructions furnished with the unit and choose the correct adaptor for the application. Do not substitute an adapter that almost fits as it will not work and could be dangerous. If a pressure bleeder is not available, a good brake fluid flow can be obtained by manually bleeding the brake hydraulic system outlined in this procedure.
- Fill the master cylinder with fresh brake fluid. Check the level often during the procedure.
- Remove the protective caps from all four bleeder screws. Save for reuse. Clean the bleeder screws.
- Connect a clear, tight fitting hose to the bleeder screw at the right rear wheel and place the hose into a clear container containing fresh brake fluid.
- Pump the brake pedal three or four times and hold down before opening the bleeder screw.
- Open the bleeder screw at least one full turn. With the bleeder screw open, the brake pedal will drop all the way down to the floor.
If the pedal is pumped rapidly, the fluid will churn and create small air bubbles, which are difficult to remove from the system. These air bubbles will eventually congregate and a spongy pedal will result.
- Hold down the brake pedal and release only after the bleeder screw has been closed.
Repeat this procedure on the remaining brake bleeder screws. The brake system is bled in the following sequence:
- Right rear
- Left rear
- Right front
- Left front
- Be sure that all trapped air has been expelled from the hydraulic system and that there is a short stroke and solid brake pedal feel. Check the brake fluid reservoir and keep filled to the proper level to ensure that no air re-enters the system through the master cylinder.
- Hydraulic brake systems must be totally flushed if the fluid becomes contaminated with water, dirt or other corrosive chemicals. To flush, bleed the entire system until all fluid has been replaced with new fluid.
- Install the bleeder cap(s) on the bleeder screws to keep dirt out. Always road test the vehicle, after brake work of any kind is performed.