How to Bleed Air from Car Brake Fluid?
2 Answers
Car brake fluid bleeding method is: 1. Press the brake pedal continuously 5 to 6 times; 2. Keep the brake pedal pressed, then immediately loosen the air screw of the right rear wheel brake caliper and quickly tighten it; 3. Repeat this action until the brake fluid shoots out from the air screw in a straight line. Brake fluid is the liquid medium that transmits braking pressure in hydraulic braking systems, used in vehicles with hydraulic braking systems. Its characteristics are: 1. Low freezing point: maintains good fluidity at low temperatures; 2. Extremely high boiling point: does not create vapor lock at high temperatures; 3. Minimal quality change: does not corrode or soften metals and rubber.
I've bled the brakes on my car several times, and it's quite simple. You need two people to cooperate: one in the driver's seat to press the brake pedal, and the other by the wheel to operate the bleeder screw. Before starting, prepare new brake fluid and ensure the master cylinder is adequately filled. Here are the specific steps: First, jack up the wheel and secure it safely, then locate the bleeder screw on the brake caliper. Have your friend slowly press the brake pedal and hold it down when fully depressed. At this point, you slightly loosen the screw to let out fluid and air, then immediately tighten it once the fluid flows out. Your friend then releases the brake pedal, and this press-and-release action is repeated multiple times until the fluid coming out is free of bubbles, indicating all air has been bled. Don’t forget to regularly check the master cylinder fluid level to avoid it running dry, which could introduce new air. The whole process requires patience. After completion, test the brake performance in a safe area. Also, remember to change the brake fluid every two years as part of regular maintenance to prevent issues.
