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How to bleed brake fluid Two-Person Bleed with Brake Bleeder Kit

Every vehicle’s brakes need to have the fluid bled and replaced from time to time. Schedules vary, so check your owner’s manual for exact timelines. Some manufactures recommend new fluid every 20,000 miles, and some recommend a bleed at 150,000 miles.

Overall, it’s a good idea to bleed and replace your brake fluid every five years or every time you work on your brake system. Keeping fluid fresh helps maintain solid stops. It’s cheaper and easier than replacing brake lines or the master cylinder, both of which can corrode with old fluid.

Overall, it’s a good idea to bleed and replace your brake fluid every five years or every time you work on your brake system. Keeping fluid fresh helps maintain solid stops. It’s cheaper and easier than replacing brake lines or the master cylinder, both of which can corrode with old fluid.

How to bleed brake fluid two-person bleed with brake bleeder kit

1

Safety First

Park your vehicle on a flat, dry surface and install wheel chocks. Open the hood and secure it. Lift the car, place it on jack stands and remove the wheels for easy access. This option requires two people and takes about the same time as the one-man option, sometimes a little less.

2

Remove the old brake fluid

Uncap the master cylinder and use the vacuum pump or turkey baster to remove most of the old brake fluid. Don’t bleed the master cylinder completely dry.

3

Add new brake fluid

Add new brake fluid to the master cylinder. Keep the master cylinder cap off or loose to allow air flow. Always put the cap back on the new brake fluid bottle. Ensure the correct match to the OE requirement, i.e., DOT 3. Reference M/C cap or owners manual. You can always double check with AutoZone.

4

Determine Which Wheel to Bleed

Check your instruction manual to determine which wheel to bleed first and the correct order. Usually you’ll start with the wheel furthest from the master cylinder.

5

Locate the Brake Bleeder Valve

Find the Brake bleeder valve. It’s a small screw with a hole in the middle. On disc brakes, the bleeder valve will be the top of the brake caliber. On drum brakes, the brake bleeder valve/screw is at the top middle on the backside of the brakes/wheel tire area.

6

Connect the vacuum pump

Connect the bleeder kit host to the bleeder valve to form a seal. You may need to use some grease to get the pump hose to connect properly. The second person should be sitting in the driver’s seat. Have them carefully pump the brakes three times, the hold pressure on the pedal. Use a clear command like “PUSH.”

7

Open the bleeder valve

Open the bleeder valve with a brake bleeder wrench. Penetrant maybe needed and allowed to soak. After opening, you should see fluid (and likely bubbles) flow through the line. The second person should continue pushing the brake pedal.
DO NOT BOTTOM OUT THE BRAKE PEDAL WITH EXCESSIVE PRESSURE WHILE PUMPING OR ANY TIME DURING THE PROCESS/ ALLOW ABOUT 3/4 TRAVEL WHEN PUMPING AND HOLDING PRESSURE.

8

Close the bleeder valve

When the fluid stops flowing, close the bleeder valve while the pedal is in the pushed down position and not moving. Then tell the second person to release pressure from the pedal. Use a clear command like “RELEASE.”

9

Repeat and dispose

Repeat steps 7-9 to bleed the line. Dispose of old brake fluid in a plastic reservoir. As brake fluid bleeds out, regularly check the master cylinder to make sure it doesn’t bleed dry. Continue to add new brake fluid to the master cylinder. When you stop seeing bubbles and see the color of the brake fluid become clearer, you’ve bled most of the air and old fluid out of the system.

10

Close the brake bleeder valve and repeat

Close the brake bleeder valve and remove the tube for the bleeder kit. Repeat on the other three wheels.

11

Fill the master cylinder

Fill master cylinder to the “full” or “max” line and re-install the cap. Ensure no contamination.

12

Put wheels on your vehicle

Put the wheels back on and lower the car to the ground safely.

13

Time to test the brakes

Test the brakes. They should feel firm, not spongy. Go for a test drive to make sure the brakes are working properly.

Advice, how-to guides, and car care information featured on AutoZone.com and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.

Be sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Always chock your wheels prior to lifting a vehicle. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Use caution when working with automotive batteries. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Do not wear ties or loose clothing when working on your vehicle.

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