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Manual Bleeding (Non-Abs)

  1. Deplete vacuum reserve from power brake booster by depressing brake pedal several times with engine off. Fill master cylinder and keep at least half full during bleeding procedure. If master cylinder is known or suspected to have air in it, go to next step. If master cylinder does not have air in it, go to step 4).
  2. Disconnect forward brakeline from master cylinder. Allow master cylinder bore to fill with fluid until it begins to flow from fitting. Connect brakeline to master cylinder and tighten fitting. Have an assistant depress brake pedal slowly one time and hold. Loosen forward brakeline fitting to release air from bore. Tighten fitting while pedal is still at floor. Release brake pedal slowly. Wait 15 seconds.
  3. Repeat step 2) until fluid is clear and free of air bubbles. Repeat procedure at rearward brakeline fitting on master cylinder. Master cylinder is now bled. If it is known that the wheel cylinders/calipers do not have air in them, it is not necessary to bleed them.
    NOTE: Individual wheel cylinders/calipers can be bled only after all air is removed from master cylinder.
  4. If wheel cylinders/calipers are known or suspected to have air in them, raise and support vehicle. Remove bleeder valve cap from first bleeder valve to be serviced. Place wrench over bleeder valve. Attach clear vinyl bleeder hose onto bleeder valve. See BRAKELINE BLEEDING SEQUENCE  table. Place other end of hose in clean transparent container.
  5. Partially fill container with clean brake fluid so end of hose is submerged in fluid. Slowly depress brake pedal one time through its full travel and hold. Open bleeder valve to purge air.
  6. Close bleeder valve and slowly release pedal. Wait 15 seconds and repeat procedure until fluid is clear and free of air bubbles. Proceed to next wheel position and repeat procedure until all air is removed from system.
    NOTE: Use slow full strokes when pumping brake pedal. Rapid pumping of brake pedal will make procedure more difficult.
  7. Ensure brake pedal feels firm and constant, not spongy. If pedal travel is not excessive, start engine. Recheck brake pedal again for firmness and no sponginess. If brake pedal is okay, road test vehicle, performing several normal stops from moderate speeds.
BRAKELINE BLEEDING SEQUENCE

Application Sequence
Cavalier & Sunfire RR, LR, RF, LF
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