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I recently had problems with my son's nearside front disc brake on a MK 6 Escort. It appeared to be sticking "on" and on one occasion the wheel started smoking and melted the plastic wheel trim! Removing the caliper and pressing the piston back into the body appeared to cure the problem. A few days later the wheel was very hot after a run and I removed the caliper and cleaned the piston again. It was when I was bleeding the brakes that I noticed the flow from this particular wheel was very slow. I have these automatic bleed kits and I noticed the fluid was flowing down the tube then being sucked back up, the brake pedal was also very tight with the bleed nipple open. t transpired that the flexible brake hose had a blockage and was not allowing the pressure to relieve from the caliper when the brake pedal was released. Changing the flexible brake hose returned the system to its original performance. As a further cautionary note, the heat generated when the brakes jammed, had cracked the disc pads and these had to be renewed.
 

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Isn't it amazing how a 3 dollar rubber hose will fail and break your rotors/pads, etc etc?? I lost a set of pads and a caliper before I realized what the culprit actually was - the hose!

This happened at night driving home. Noticed car was sluggish. Got home, turned off lights and made for the walkway. The rotor had an erie orange almost-impercetible glow about it because it was so hot.

All the more reason to switch to braided steel lines.
 

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Sounds to me like you aren't bleeding your brakes often enough.

And I would be suspicious of the caliper also. It probably has chunks of rust in it unless you were able to clean it out real good.
 
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