i have had a problem with my front drivers side brake over the last few days and had come to the conclusion that it was seizing - stripped and put back together and was ok for about 8 miles and then seized again - have ordered new disks, pads and different caliper - i have striped the passenger side as the easy option and this is the same - the pistons return back lovely/easily but when attached to the car and are pressed out they do not return on their own - just done the manual conversion and trying to retrace steps and only changes are - different balance bar (for clutch servo) - new pipe from brake master to plenum and the new brake pedal - it bothers me that it could be a system fault and not seizing - i dont want to fit the new disks and pads for it to seize and damage the new stuff - amy help as always much appreciated

does the pedal feel spongy? if so did you bleed them properly? (ABS unit, fronts then rears, ABS unit again just to make sure)

after the unseize the brakes feel good - then as they start to seize the pedal goes rock hard - i can see when someone operates the brake pedal they work well but they do not release as they should -

A dead give away of a seizing piston is a hot wheel hub even after quite a short journey. If the pistons go back in freely it doesnt sound like they are seizing. Maybe the pad edges are rusting and making them jam in the caliper?

Make sure you havent kinked a brake hose or pipe when youve been working on it.

thanks for the replies guys - the pads were new (not any more) - the only thing i have just found on the internet is about brake pedal free play - if no free play then this will not allow fluid back into master cylinder - i wander if this could be it as i didnt check that as i fitted my new pedal assembly follwing my conversion- once again many thanks

thanks for the replies guys - the pads were new (not any more) - the only thing i have just found on the internet is about brake pedal free play - if no free play then this will not allow fluid back into master cylinder - i wander if this could be it as i didnt check that as i fitted my new pedal assembly follwing my conversion- once again many thanks

 

More than likely,the fluid expands with heat and effectively puts the brakes on!