How to Bleed a Car Brake System

Bleeding a car brake system is a necessary maintenance procedure that helps to remove air from the system and restore proper brake function. Air in the brake system can cause the brakes to feel spongy or ineffective, and can also lead to premature brake failure. Bleeding the brakes is a relatively simple procedure that can be done at home with a few basic tools.

Tools and Materials

Brake fluid
Brake bleeder wrench
Clear plastic tubing
Assistant

Safety Precautions

Brake fluid is corrosive, so it is important to wear gloves and eye protection when handling it.
Do not allow brake fluid to come into contact with painted surfaces, as it can damage the paint.
Be sure to work in a well-ventilated area, as brake fluid can produce harmful fumes.

Procedure

Gather your tools and materials.
Park the car on a level surface and engage the parking brake.
Open the hood and locate the brake fluid reservoir. Fill the reservoir to the proper level with fresh brake fluid.
Locate the bleeder screw on the brake caliper for the wheel you are bleeding. The bleeder screw is usually located on the top of the caliper, near where the brake line connects.
Attach the clear plastic tubing to the bleeder screw. The other end of the tubing should be submerged in a container of clean brake fluid.
Have your assistant pump the brake pedal several times, then hold it down. While your assistant is holding the pedal down, open the bleeder screw slightly. Brake fluid will begin to flow out of the tubing and into the container.
Close the bleeder screw once the fluid has stopped flowing. Have your assistant release the brake pedal.
Repeat steps 6 and 7 until no more air bubbles are visible in the brake fluid. It may be necessary to add brake fluid to the reservoir as you bleed the brakes.
Once the brakes are bled, tighten the bleeder screw securely. Remove the tubing and top off the brake fluid reservoir to the proper level.
Repeat the bleeding procedure for the remaining wheels.

Tips

It is important to bleed the brakes in the following order: right rear, left rear, right front, left front.
Be patient and take your time when bleeding the brakes. It may take several attempts to remove all of the air from the system.
If you have any difficulty bleeding the brakes, consult a qualified mechanic.

Conclusion

Bleeding a car brake system is a necessary maintenance procedure that can help to restore proper brake function and prevent premature brake failure. By following the steps outlined in this guide, you can safely and effectively bleed the brakes on your own car.