One of the caliper mounts on my Sable won't "accordian" in, therefore I can't install new brake pads. I tried compressing it with a 4" clamp and broke the cast frame of the clamp! I tried tapping it with a hammer, then hitting it harder, then finally bashing it but it remains fully extended. This is the mounting bolt with the rubber casing, not the caliper itself. Suggestions greatly appreciated.
Doug