QuestionI replaced the brake booster and the master cylinder on my 1992 cadillac deville. It still has no brakes. I looked all around the car no oil leaks by the tires and I took the tires off and it looked fine. My bleeder screw is rusted to bleed the brakes. My dad said that if I pump the brakes for a week the air will come out of the lines. It happened to him before and it finally straitned up. Thanks for any help.
AnswerHello,
No driving the car will not take the air out. In fact, if you have air in the line, you can momentarily loose your brakes.
Since I am a Wisconsin man fed up with the use of road salt, calcium chloride, and what ever other crap they use to destroy cars and drinking water. I moved to Texas.
Since you are stuck with the rust, you need a mechanic with a gas ax (torch) to heat around the bleeder without blowing out the wheel cylinder and get those bleeders loosened up. It is the only way you can safely repair the brake system. Worst case, you need to replace calipers and wheel cylinders.
Being I had to deal with rusty bleeders whole life, I think I only broke of one rusty bleeder screw and never blew out a wheel cylinder. I would only hold the torch in that area for seconds. The bleeder and base of the cylinder where is screws in would be cherry re. Tighten a little, loosen, go back and forth a bit a bleeder comes right out!
Propane torches don't get hot enough and you might blow out a wheel cylinder! The brakes have to be bled, especially if your master was sucking air from being dry. Even though the front and rears are separate, I would bleed all 4. You will get a good pedal and best of all, you and others on the road will be safe!
Good luck!
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