I've been reading about the proper way to compress rear calipers (a little too late) and think I may have screwed up. I was trying to turn my calipers in on both sides, Passenger side I turned it one full rotation clockwise and it was enough to get the caliper back on the car. Passenger side (looks to be a relatively new caliper) I turned it a little and had a lot of resistance so I Stopped and turned to the forums. Using a clamp on this same caliper with a soclet over the actuator screw, I'm still unable to compress the piston enough to get the caliper back on. Wondering if I am screwed and need to replace this caliper that looks brand new, or if there is a way to fix what I've done so far. Thanks in advance

you put a socket over After removing the nut, lever, etc?

The Piston may have "Blown the back" out of it & can't compress it.

If was a "rebuilt" caliper, often they use a "rebuilt" piston or worse just reuse same piston & then have same binding problems that can cause way worse problems.

See https://web.archive.org/web...rocave/brakerear.htm & rest of section.

Is likely need to remove the piston to see.
dirt boot stays to push the piston thru.
To reinstall the piston is more work & can save the boot too but not so easy to get out. That if don't tear other seals during the job.

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