I've just had sorted a fairly major issue with my front discs which might help some people regarding tight fitting pads and squeal:
(not a set from K-tec I might add, standard discs/pads from local motorfactors)
Fitted new Discs and Pads end of november.......discs went on fine however the pads (even being the correct one) took a lot of effort getting them into the calipers (which I even tried wire brushing to remove build up of old dust). After fitting them took them on a short journey (gingerly) to find they were sitting on the disc even after letting off the stop pedal.......also only half the disc was being contacted by the pad and they were getting very warm.
After a bit of jiggery pokery with a mahic wand I managed to get the pads to contact properly but have not been 100% sure of them since.
Then last thursday on the way home from work managed to cook the pads.......this was following a line of traffic at quite a slow speed 30-50 country roads (although I did pre warm the pads with a little left foot breaking coming out of work as I have found they are rubbish from cold).
Took my car to my friendly local Kwik-Fit garage and left it with them sat morning, got a call to say it was all ready so headed back down:
Was told that although the pads were correct the paint on the pad guides (bits on each side of the flat surface to locate in the caliper) was too thick and was causing the pads, when applied to the discs and warming up, to expand into the caliper and sticking on. Hence getting very hot!! Eeeek
Kwik-Fit kindly deglazed my pads (which I was told were still fine and I hadnt warped my discs luckily) and had removed the extra offending paint.....
...the best bit was they didnt charge me either.......I guess I do go there a lot though......
Brakes are now more responsive, but until they are bedded in I wont be totally sure. I reckon my fluid needs changing, but intend to get some braded lines from K-tec, so will prob do the two jobs together.
Currently the left brake squeals under 20-60% braking.....if someone knows which it might be helpful to others in this thread: is this a toe in senario of the pad-to-disc or toe out, causing reverberation/squeal? Same as the squeal on mountain bike brakes....? Can it be fixed by putting a chamfer on the leading edge of the pads?