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Rebuild or Replace brake system

909 Views 7 Replies 5 Participants Last post by  Olle
I have a 67 Chevelle that is basically all original to my knowledge. Last week I went to back it out of the garage and the brake pedal went to the floor. I determined the master cylinder was the problem and pulled it from the car today. I noticed sludge in the bottom of each reservoir and inside of the cylinder when I pulled it apart. I noticed the aluminum pistons were pitted maybe adding to the sludge. What I am concerned with is if this sludge is through the whole brake system. I want to flush the whole system because as far as I know this is the original brake fluid, at least from the 1970’s. I was planning on replacing the brake hoses as well. I am also concerned with are the metal brake lines. They look solid from the outside, however; I don’t know if they are corroded on the inside. Should I flush them with alcohol and blow them out or just replace them? Should I replace/rebuild the wheel cylinders even though they are not leaking? Any suggestions?

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You will probably find the same kind of sludge inside the brake cylinders, possibly in the brake lines as well. Brake lines and cylinders are cheap. I would just replace them.
New wheel cylinders are $10 each and easy to come by. It's not worth fooling with the old ones, IMO.
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