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Do I Need to Clean the Piston at the Caliper?
OK, JimNoLimit, thanks for your reply. The 30mm nut is back on. Some WD40 and a few whack with a rubber mallot got the rotor off. Put in new rotors.
Do I need to clean the edge of the piston before I push it back in? I used two pieces of wood shims to protect the brake pads and used a screw driver to pry the pad/piston back into the caliper. Reason I asked is the rotation seems stiff while in neutral. Feels like the pads are grabing the rotor. A short drive around the block ... the rotor is hot to the touch. Should it be like that? I can turn the wheel with my hands but the wheel is a big "lever". I suspect if the wheel is off and I try to turn it by the studs, it'll feel a lot tighter.
Maybe there are dirt around the edge of the piston as it is expose more as the pads or the rotors wears down. New rotor is thicker and requires the piston to be pushed back more. If there is dirt, it will not receed when the brake peddle is release?