Air bubbles are often trapped when the level of brake fluid drops too low. This happens in the master cylinder. This causes a squishy or spongy feeling once you engage your brakes. Bleeding brakes involves the removal of these air bubbles from the car’s brake system.
The first step is locating the brake bleeder screw. It is found behind your brakes. Loosen this screw using a wrench. Spraying a penetrant can help to loosen it. Fit the end of the hose of the brake bleeder screw to a bottle. This bottle should be filled with brake fluid to a point where the hose’s tip is submerged.
Before Bleeding Your Brakes
Before bleeding your brakes, you need to find out the type of brake fluid that’s required by your car. Intervals for the replacement of brake fluid also need to be established. Jacks and stands are to be used to support your car during this process.
Testing the brake fluid needs to be done with the help of a partner. He or she should push the brake pedal. This needs to be done several times. Open the bleeder screw while your partner is still holding the pedal down. Bubbles will be seen as brake fluid oozes out of the nozzle.
Tightening of the screw is the next step. This should be done while your partner is still holding onto the pedal. Thereafter, ask him or her to let go of the pedal. This loosening and tightening should be repeated until there are no more bubbles.
This process needs to be repeated on each brake. Brake fluid should be filled in the master cylinder before bleeding the brakes. This cylinder will draw air into the lines if this is not done. The master cylinder will be drained out completely. This will necessitate the bleeding out of the master cylinder.
Application of pressure onto the brake pedal needs to happen thereafter. This should be followed by a sudden release.
Monitor the movement of the brake fluid within the master cylinder. If you notice considerable fluid eruption, this indicates the presence of bubbles within the system. You will have to repeat the bleeding process.
Once bleeding is over, you need to tighten the bleeder screws. This should be done after filling the master cylinder.
Double-check to ensure all screws are tight. Reinstall the wheels of your car thereafter. Test drive to find out whether the brakes are functioning in the right manner when you push the brake pedal.
If the brakes are functioning properly, you have successfully completed the operation.