I recently replaced brake line that rusted in two going from a coupling under the driver seat all the way back to the right rear wheel cylinder. The bleeder screw broke off so I replaced the wheel cylinder at that time also. I bled the brakes using the two-person pumping method. Braking was greatly improved but with greater pedal travel than before the rust-through. After a few weeks I noticed the pedal travel increasing, so I crawled underneath and found a slow leak at a new coupling which I loosened and re-tightened and it seemed to stop the leak. The fluid in the master cylinder had gotten very low and possibly introduced air into the lines so I again bled the brakes using the two-person method. This did not improve the extensive pedal travel very much, but I had a little improvement. I then attempted gravity bleeding from the farthest wheel which happens to be the one where I replaced the wheel cylinder. The clear hose I used would show clean fluid go through a few inches, then a bunch of air bubbles, then clear fluid, then air. This continued for at least thirty to forty five minutes and the air bubbles kept coming. I went through at least a pint of brake fluid and the pedal travel is the same. It is not all the way to the floor, but is excessive. I have examined the calipers, hoses, lines, connections, wheel cylinders and do not see a leak elsewhere. Is there a surefire way to judge whether or not the master cylinder is causing this before I throw money at a part that may or may not solve the problem?
have the same problem?
Wednesday, October 19th, 2016 AT 6:43 PM