I used to rebuild calipers. Not anymore.

It's just not worth the effort when the cost of rebuilt units is so low. The last calipers I rebuilt were well stuck. It took hours to get the pistons out. There wasn't alot of corrosion--mostly staining. I cleaned the pistons with a buffer and jeweler's rouge, and the bore with fine steel wool.

A year later, when I went to replace the pads, the caliper was once again stuck. I ended up replacing the caliper anyway.

But Brian Carleton is right. If there is any corrosion whatsoever, the caliper is not rebuildable. And I believe that corrosion is mostly why they fail. So what's the point of rebuilding?

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1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"