ok, typical brake and rotor change. thicker pads and thicker rotors means i need to depress the piston in order to fit the caliper over the new pads and rotor well...i went and bought a 6" c clamp from sears...30 minutes later, i bent the damn thing because i cant get the piston to depress. i thought it had too much pressure. 30 minutes later, i have the brake lines off, and the caliper off of the car, no fluid or pressure on the piston...still cant get it to depress. wtf is goin on? any tips? is the piston seized or somethin? btw, car is a 91 ford taurus.