I just disassembled the brake calipers on my '78 280z and had a few questions. All the cylinder bores were in good shape but I noticed a couple of the pistons had some mid corrosion. You can't feel the corrosion spots unless you drag a fingernail across. Will I be able to rebuild these calipers or will I need to look at replacing them? Can you buy replacement pistons? I haven't been able to find any info so far. Thanks for the responses.

Brent

Probably depends on if the corrosion is on the piston seal surface or not.

I had a tiny little scratch in the bore of one of my calipers from the PO's rebuild (I think he dragged the dust cover holder wire across the surface) and the brakes worked fine but the caliper leaked fluid.

Fully rebuilt calipers are surprisingly cheap. I think I got one for about $30 at OReilly auto a year and a half back.

http://www.rockauto.com/catalog/raframecatalog.php

Did you see this?

http://www.classiczcars.com/forums/content.php?151-Brake-caliper-restoration

Thanks for the replies. I think I'll rebuild the calipers I have. They weren't leaking before so I hope they stay that way.