After seeing how bad the front calipers were, I knew the rear needed to be gone thru. I did a search and couldn't answer my question.
Can someone tell me why they milled away a portion of the surface of the piston that bears on the pad. I did a search on the web and found rebuilt calipers and saw the same "cut-out" on all the ones I looked at, so, there must be a good reason. A second question might be, what direction must the cutout face, but I think it would move in time, so I don't think it's a matter of how it faces - but why is it there
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Can someone tell me why they milled away a portion of the surface of the piston that bears on the pad. I did a search on the web and found rebuilt calipers and saw the same "cut-out" on all the ones I looked at, so, there must be a good reason. A second question might be, what direction must the cutout face, but I think it would move in time, so I don't think it's a matter of how it faces - but why is it there