Bleed the brake lines
Usually if you perform some work on the brakes or if you disconnect the lines for maintenance, you need to bleed the brakes. It is a job that can be done in an hour with the help of an assistant by any average weekend mechanic.
Follow these steps:
- Locate the master cylinder under your car’s hood.
- Move yourself to the farthest rear wheel from the master cylinder and look for the bleeder valve. It is usually near the brake line against the brake housing and it has a small hole in it.
- First, loosen the bolt, and then ask an assistant pump the brake pedal a few times and then hold it pressed. In this time, you should put a container under the valve to catch the leaking fluid. When no air bubbles come out any more, tighten the valve.
- Refill the master cylinder if needed.
- Repeat the process to the remaining rear wheel and front wheels as well. When done check the master cylinder and refill if the level is below full.