Check the caliper piston dust cover for tears. If any found, the piston coudl be sticking due to contaminations and it would have to be serviced and the dust and piston seals replaced. Note if the piston is pitted due to rust and if yes, the piston would have to be replaced as well.
If dust cover is good and you can easily compress the piston with the aid of a G-clapm,
Check the slider bolts. After compressing the piston, remove the pads and reinstall the caliper. Tighten the slider bolts and move the caliper in and out on the axis of the slider bolts, it should move freely with no stiffness. If stiffness is present, remove the slider bolts and clean them and caliper mounts for slider bolts of rust and contaminations. Lubricate with molybdenum grease and retest. If slider bolt dust cover are bad, they have to be replaced to prevent contaminations.
If both above are good, check the flexible hose. It could be bad preventing fluid pressure from being released.
Sunday, September 19th, 2010 AT 1:34 AM