Brakes Binding - MINI Cooper Forum

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post #1 of 6 (permalink) Old Aug 20th, 2014, 11:41 AM Thread Starter
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Brakes Binding

Hi everybody. I have just bought my wife a R50 Cooper.
the only problem is the front brakes appear to be binding as the discs have got heat discolouration and they are very hot even after a short blast.
I have put copperslip grease on the back of the pads and on the slide area.
Could the piston be sticking in the caliber and if so, is it an easy fix?
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post #2 of 6 (permalink) Old Aug 20th, 2014, 02:11 PM
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If both front brakes are binding it could be the pistons are sticking. What's the situation with the rear brakes? If they're all binding,then the master cylinder is the culprit.
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post #3 of 6 (permalink) Old Aug 21st, 2014, 09:18 AM Thread Starter
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Unhappy

Hi, it does look like the rears are binding as all the disc show discolouration.

Is it a big expensive job to do the master cylinder?
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post #4 of 6 (permalink) Old Aug 21st, 2014, 09:41 AM Thread Starter
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Hi, Would I need to replace the servo aswell or can I just replace the master cylinder on its own?

Cheers.
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post #5 of 6 (permalink) Old Aug 21st, 2014, 04:19 PM
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Brakes binding

You don't have to change the servo as the master cylinder is usually bolted to it.
Years ago you could rebuild master cylinders as long as the bore wasn't scored,but nowadays it seems to be a case of fitting a new cylinder.
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post #6 of 6 (permalink) Old Aug 22nd, 2014, 10:04 AM
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Re binding brakes.
I studied the Haynes manual just now and it stipulates that if you change the master cylinder you must not turn on the ignition during the procedure or you'll have to get a Mni dealer to bleed the regulator!
There's another item to check before removing the master cylinder and it's the check valve on the servo where air should only go in one direction-it might be sticking.
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