1. Gather Your Supplies:
* Brake fluid: Use fresh DOT 3 brake fluid (check your owner's manual to be absolutely sure). Never use DOT 5 silicone-based fluid in a system designed for DOT 3 or 4.
* Wrench: Appropriate size for your bleeder valve (usually 8mm or 10mm – check your car).
* Clear tubing: About 18-24 inches long. This will connect the bleeder valve to a container to catch the old fluid.
* Container: A jar or bottle to collect the old brake fluid.
* Assistant: It's much easier with a helper to pump the brake pedal.
* Shop rags or paper towels: To clean up any spills.
* Gloves: Brake fluid is corrosive.
2. Preparation:
* Park on a level surface: This ensures proper fluid flow.
* Engage the parking brake: This is crucial for safety.
* Locate the bleeder valves: These are typically located on the top of each caliper. The order of bleeding is usually:
* Rear passenger side
* Rear driver side
* Front passenger side
* Front driver side (This order is recommended to work from furthest from the master cylinder to closest)
* Fill the master cylinder reservoir: Make sure the master cylinder reservoir is topped off with fresh brake fluid. Check your owner's manual for the correct fluid type. Keep it topped off throughout the bleeding process.
3. Bleeding the Brakes:
* Attach the tubing: Attach one end of the clear tubing to the bleeder valve and submerge the other end in the container.
* Open the bleeder valve: Have your assistant firmly depress the brake pedal several times (do not let them pump the pedal repeatedly; one firm push and hold).
* Hold the bleeder valve open: While the pedal is depressed, carefully crack open the bleeder valve with the wrench. You should see old brake fluid flowing into the container.
* Close the bleeder valve: Close the bleeder valve before your assistant releases the brake pedal.
* Repeat: Repeat this process several times until the fluid running through the tubing is clean and free of bubbles.
* Repeat for each wheel: Repeat steps 3-5 for each wheel in the recommended order (rear passenger, rear driver, front passenger, front driver). Keep the master cylinder reservoir topped off at all times.
4. Check for leaks: Inspect all connections and the bleeder valves for any leaks after bleeding.
5. Test the brakes: After bleeding, carefully test the brakes. They should feel firm and responsive. If not, there may be a problem with the system that requires further investigation.
Important Considerations for a 1992 Acura Legend LS:
* ABS: If your Acura Legend has Anti-lock Braking System (ABS), bleeding the brakes can be more complex. You might need a specialized scan tool to properly bleed the ABS system. It's best to consult a repair manual or a professional mechanic in this case.
* Brake System Pressure: Be cautious not to introduce air into the master cylinder, which can result in brake failure. Keep the reservoir full.
When to Seek Professional Help:
If you're not comfortable performing this procedure yourself, it's always best to take your car to a qualified mechanic. Improperly bled brakes can be extremely dangerous. If you encounter any difficulties during the process, don't hesitate to seek professional assistance. A poorly bled system can compromise your braking ability.
