Tempo L4-140 2.3L HSC (1986)
Brake Bleeding: Service and Repair
Hydraulic System Bleeding
When any part of the hydraulic system has been disconnected for service, air may enter system and cause spongy pedal action. Bleed the hydraulic
system after it has been opened to ensure that all air is expelled.
1. Clean all dirt from master cylinder filler cap.
2. If master cylinder is known or suspected to have air in bore, it must be bled before any of the wheel cylinders or calipers. To bleed master
cylinder, loosen upper secondary outlet fitting approximately three-quarter turn.
3. Have assistant push brake pedal down slowly through full travel. Close outlet fitting, then return pedal slowly to full released position. Wait five
seconds, then repeat operation until air bubbles cease to appear.
4. Loosen upper primary outlet fitting approximately three-quarter turn.
5. Repeat Step 3.
6. To continue to bleed brake system, remove rubber dust cap from wheel cylinder bleeder fitting or caliper fitting. Check to ensure bleeder fitting is
positioned at upper half of front caliper. If not, caliper is located on wrong side. Place suitable box wrench on bleeder fitting and attach rubber
drain tube to fitting. The end of tube should fit snugly around bleeder fitting.
7. Submerge free end of tube in container partially filled with clean brake fluid and loosen bleeder fitting approximately three-quarter turn.
8. Have assistant push brake pedal down slowly through full travel. Close bleeder fitting, then return pedal to full release position. Wait five seconds
, then repeat this operation until air bubbles cease to appear at submerged end of bleeder tube.
9. When fluid is completely free of air bubbles, secure bleeder fitting and remove bleeder tube. Install rubber dust cap on bleeder fitting.
10. Repeat this process on opposite diagonal system. Refill master cylinder reservoir after each wheel cylinder or caliper is bled, and install master
cylinder cover and gasket. When bleeding operation is completed, fluid level should be filled to maximum fill level indicated on reservoir.
11. Always ensure disc brake pistons are returned to their normal positions by depressing brake pedal several times until normal pedal travel is
12. Check pedal feel. If pedal feels "spongy" repeat bleed procedure.