Tools and Materials Needed:
- New master cylinder
- Brake fluid
- Brake line wrench or flare nut wrench
- Screwdriver
- Pliers
- Rags
- Safety goggles
Procedure:
1. Preparation:
- Disconnect the negative battery terminal to prevent accidental electrical shocks.
- Raise the front of the car securely using jack stands or ramps.
- Jack the car high enough to access the master cylinder.
- Apply parking brakes.
2. Draining Brake Fluid:
- Locate the brake fluid reservoir. It's usually near the master cylinder.
- Open the reservoir cap.
- Remove the rubber cover that seals the master cylinder.
- Use a turkey baster or syringe to remove as much brake fluid from the reservoir as possible.
- Reinstall the rubber cover and reservoir cap.
3. Disconnecting Brake Lines:
- Disconnect the brake lines from the master cylinder. You may need a brake line wrench or flare nut wrench for this step.
- Be cautious as brake fluid may leak out during this process.
- Plug the open ends of the brake lines immediately to prevent air from entering the lines.
4. Removing the Old Master Cylinder:
- Locate the two mounting nuts on the master cylinder.
- Use a screwdriver or pliers to loosen the nuts.
- Be mindful of residual brake fluid that might drip from the master cylinder.
- Pull the old master cylinder upwards to remove it.
5. Installing the New Master Cylinder:
- Before installing the new master cylinder, check that the mounting holes align with the studs.
- Place the new master cylinder in place, aligning it with the mounting holes.
- Replace and tighten the mounting nuts securely.
6. Connecting the Brake Lines:
- Thread one end of each brake line back into the master cylinder.
- Tighten the brake lines with the brake line wrench until they're snug.
- Make sure the lines are connected correctly and securely.
7. Filling and Bleeding the Brake System:
- Fill the brake fluid reservoir with new brake fluid.
- Begin bleeding the brake system to remove any air that may have entered the lines during the process. Bleeding brake lines usually involves opening and closing specific valves while applying the brake pedal until all air is removed and the pedals are firm.
Tips:
- Follow the specific instructions provided in your vehicle's repair manual for your particular model.
- Be mindful to maintain cleanliness during this process to prevent dirt or debris from entering the brake system.
- It's recommended to have a helper assist with bleeding the brake system.
Bleeding brakes is a critical step to ensure proper brake functionality and safety. If you're not confident in your ability to perform the bleeding procedure correctly, consider consulting with a professional mechanic or seeking assistance from an experienced individual.
