How to Bleed the Brakes?
4 Answers
Locate the bleeder screw on the brake caliper, remove the dust cap from the bleeder valve, and then connect a rubber tube from the bleeder valve to a drain bottle. Have one person pump the brake pedal 4-5 times inside the car, then firmly press and hold the brake pedal down. Meanwhile, another person should loosen the bleeder screw on the brake caliper. Repeat the above steps until only brake fluid comes out without any air bubbles, indicating that all the air has been purged from the brake lines.
I remember performing a brake bleed on my beloved car last year, and the whole process was quite interesting. You'll need brake fluid, a transparent hose, an empty bottle as a container, and it's best to have a friend assist. Start bleeding from the rear right wheel first, as air bubbles tend to accumulate there. Your friend sits in the driver's seat, pumping the brake pedal a few times to build pressure, then you quickly open the bleeder valve on the wheel to let the air-contaminated fluid flow into the bottle; when the fluid runs clear without bubbles, close the valve and move to the next wheel. Throughout the process, keep checking the master cylinder fluid level to prevent it from running dry, which could introduce more air. After completion, start the car and test the brakes to ensure the pedal feels rock solid - this sense of accomplishment is fantastic. But remember, brake fluid is corrosive, so wear gloves to protect yourself.
First time doing a brake bleed by myself, I was a bit confused. Started by watching tutorial videos, then gathered the tools: a plastic hose, an old drink bottle, and enlisted the neighbor's help. He pressed the brake pedal while I opened and closed the bleed valve, starting from the rear wheels. When I saw the fluid coming out with bubbles, I slowly turned the valve to let the fluid drain until it ran completely clear. If there was any leakage or slow operation, my friend had to press the pedal a few more times. Don’t forget to close the valve during the process, or all the fluid will leak out. After finishing, top up with new fluid and check the entire system. What beginners often forget is wearing gloves—brake fluid stinks when it gets on your hands. A few practice runs and you’ll get the hang of it—saves money and boosts confidence.
Bleeding the brakes is crucial for driving safety and must not be taken lightly. Air in the system can cause the brakes to become soft and fail. Before starting, ensure the car is parked on a level surface, and avoid smoking or any open flames; brake fluid is flammable and toxic, so wearing goggles and gloves is a must. The procedure involves opening the bleeder valve on each wheel one by one, having a friend press the pedal to build pressure and release fluid to expel air; once the fluid runs clear, close the valve and move to the next point. It's important to start with the wheel farthest from the master cylinder, such as the rear wheels. After completing the process, test the brakes at low speeds to confirm they are functioning properly before driving at higher speeds. Neglecting this step can have serious consequences, so if you're not familiar with the process, it's recommended to visit a professional shop.
