Below guide will teach you How to Replace a Brake Master Cylinder. Please follow the instructions carefully.
Things You’ll Need:
- Combination Wrench Set
- Socket and Ratchet Set
- 3/8 in. Drive Ratchet
- Brake Fluid
- Brake Master Cylinder
- DIY Costs: Est. $271.56 parts only
- Shop Costs: Est. $472.25 parts and labor
- Park the vehicle on a level surface and prop the hood up.
- Find the position of the master cylinder and examine the level of the brake fluid.
- Evacuate the brake fluid from the master cylinder with the help of turkey baster.
- Making use of flare nut wrench, disconnect the brake lines from the brake master cylinder. Also detach electrical connectors from the master cylinder.
- Remove the brake master cylinder from the brake booster by unbolting the bolts and replace it with new brake master cylinder.
- Using recommended brake fluid for your vehicle, fill up both the chambers of brake master cylinder reservoir.
- Thread the adapters into the brake master cylinder with the help of bench bleeding kit.
- Guide the plastic tubing back into the master cylinder.
- Pump the piston with full strokes. You may require Phillips Screwdriver to do this. You need to pump the brake master till all the air is evacuated.
- Take the bench bleeding kit out and reconnect the brake lines. Add more brake fluid to the master cylinder.
- Next, close the hood and raise vehicle with the help of floor jack.
- To ensure your safety, prop the vehicle on the jack stands.
- Unfasten the lug nuts holding the wheels and take the wheels away from the vehicle.
- Support the brake pedal with 1 x 4 size wooden block so that it doesn’t move far.
- On the passenger side, look for the brake bleeding valve somewhere around the brake caliper or wheel cylinder.
- Fix a piece of clear plastic tubing to the brake bleeder screw and insert the other end of the tubing into the container filled with brake fluid.
- Instruct your assistant to press down and hold the brake pedal.
- Loosen the bleeder valve and let the fluid and air evacuate from the reservoir.
- Retighten the brake bleeding valve screw.
- Keep repeating the process till there are no air bubbles appear in the brake fluid.
- Add more brake fluid to the master cylinder and make sure it is filled up to the required level.
- You need to do the same, i.e. from step 16 to 21 on other wheels in the order of left rear wheel, right front wheel and left front wheel.
- Once you have replaced the master cylinder for all the wheels, put the wheels back and secure them with lug nuts.
- Take a small drive to make sure that everything is working well.