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Re: ????why are my brakes on constantly???? (archive)

[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]

Posted by David F on April 04, 2001 at 08:23:16:

In Reply to: ????why are my brakes on constantly???? posted by bert on April 04, 2001 at 07:57:33:

My 88 750 is starting to do the same thing after prolonged stop and go traffic. Some have suggested that the master cylinder is the problem. My pedal IS returning to the normal position. Is yours?

Since my problem is intermittant, I cannot perform the following, maybe you can:
1. Loosen master cylinder mounting bolts at brake booster. If brakes release, then I would suspect the booster is not returning. Check for pedal obstructions that would prevent the pedal from returning to normal position. Otherwise, suspect a faulty booster.
2. If no changer after step 1, then crack a pressure line or two. If brake(s) release then suspect a faulty master cylinder.

One interesting fact on my car is that the pedal never really feels the same from day to day or stop to stop. I really am leaning toward the master cylinder and possibly a weak accumulator.

And no....don't say because I'm pressing the brake pedal or the emergency brake is on :)

The brakes don't seem to want to retract back.

What could be causing this? Need help desperately!


1989 750iL

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