What you need to do to remove the air from the braking system
When air gets trapped into the braking system, braking becomes more and more hard, and the pedals become spongy. Air usually gets into the system every time you change a component of the braking system. For this, you have to bleed the system starting with the wheel farthest from the master cylinder and then advancing to the closest.
Follow these steps:
- Raise the car’s hood and check the master cylinder. Fill it if you see the level is low.
- Secure the wheels with chocks. Loosen the lug nuts holding the wheels but do not remove them and lift the car with a floor jack. Then place it on 4 jack stands.
- Now remove the wheels completely.
- Connect a tube to the bleeder valve and place the other end into a container.
- Open the valve with a wrench and ask your assistant to push the brake pedal and hold it pressed. Fluid will start pouring through the tube. Close the valve and ask your assistant to release the pedal. Repeat this steps until the fluid coming into the container is clean and clear.
- Refill the master cylinder to the full level.
- Do the same thing for the other rear wheel, and to the front wheels. When finished don’t forget to fill the master cylinder. Get the car off the jack stands and get it on the ground. Before this don’t forget to tighten the lug nuts on the wheels.