I had to replace the left rear bakeline in my 93 Corsica and I am having problems w/ bleeding them. I have tried to bleed them all day and I am still getting air bubbles. I did see a drop of brake fluid by the Master Cylinder, So I am wondering if the Master Cylinder is the problem.
im thinking yu have tightened up any connections at the master clyinder also if you had let the cylinder go dry you gotta bleed it. ok then you need to keep plenty of juice in the cylinder there are 2 resivors. go to the wheel that is furthest from the cylinder, but first pull the drum on the replacement brake linings look at the brake cylinders pull back a boot not off just take a piece of it and peel it back not off if you get any fluid coming out of it you have a bad cylinder check the other side of the cylinder if it is good look to see if the piston push rods are set right if they look cool button it back up,, have some one get in the car pump it up and you open the bleed bolt. well you know how to do that retighten pump open hold down tighten untill a stright shot comes out tighten go back to the cylinder refill go to the rear drivers side same deal then front pass then drivers side you should have pedel just dont let your cylinder go down. If you have abs then you may need to vacum bleed them your shop has one. all else fails new cylinder ALWAYS go to the easist thing first and work up. how come you only replace one wheel brake linings? maybe i misunderstood. good luck
This occured on my car, after I replaced the rear brake lines. If at any time, the brake pedal was pressed while the system was drained, the piston in the master cylinder may have pushed out too far. Trying to bleed and repressurize could have ruptured the master cylinder's seal because of this. If that is the case, you will continue to see air bubbles, and fail to build brake pressure, as the fluid is bypassing the cylinder due to a damaged seal. You will either have to purchase a master cylinder rebuild kit to replace the damaged seal (it comes with a new spring as well), or replace the master cylinder with a new/rebuilt unit. I hope this answers your question.
if you wasn't having problems with the master cylinder before.it is most likely not your master cylinder is bad. However.if you let the master cylinder go dry.then you may need to bleed it before you bleed the rest of the system. To do this.simply have someone press on the brake pedal then crack the line coming out of the master cylinder. once it goes to the floor tighten the line and repeat this sequence until you get stratight fluid fromt the lines on the master cylender. You can do both lines at the same time to speed things up, once you get clear fluid there.you should be able to complete bleeding the brakes in the normal manner. If this doesn't work.then yeah.the master cylinder is probably bad. Hope this helps
