If the chips are on the portion that is outside the cylinder you can probably reuse...

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Caliper rebuild question
Jaay - Thursday, 10 April, 2014, at 4:53:12 pm

I am at the end of my rebuild and the last piston that I am doing has some chips in the coating. Should I source a new piston or is this ok to use? I feel that it is not ok. Link to the photos

[986forum.com]

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If the chips are on the portion that is outside the cylinder you can probably reuse...
MarcW - Thursday, 10 April, 2014, at 10:19:01 pm

the piston. If the chip are on the portion that fits in the cylinder I'd be leery of reusing the piston.

OTOH, I do not like to reuse compromised components, especially those that are in safety critical systems. So, what is the damage to just buy a new piston?

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Re: Caliper rebuild question
Jaay - Thursday, 10 April, 2014, at 10:21:15 pm

Agreed. I am going to pick up a new one. I think they are about 25 dollars.

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Re: Caliper rebuild question
Jaay - Friday, 11 April, 2014, at 6:50:57 pm

I ordered a new piston to play it safe. After all it is my brakes.

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