Rick's Free Auto Repair Advice

Reuse brake rotors

Reuse brake rotors

I see this question a lot on auto forums. Someone says, “My rotors look fine. Can I reuse my brake rotors?” Well, first, let’s define the word “fine.” You can certainly rule out reusing a brake rotor if you see deep grooves, heat discoloration, and cracks. But can you rule it “in” if it doesn’t have those issues? NO! Because there’s no way you can visually gauge the thickness of your rotor. You need a micrometer.

In order to reuse a rotor, it must be:

At least .015″ thicker than the rotor’s discard thickness cast or stamped into the rotor.
Not have any grooves deeper than 1/32″
Heat discoloration free
Rust free in the cooling vanes

If you decide to reuse a rotor

You must perform a bedding procedure on the new pads
You must re-apply grease to the caliper slide pins, back of the noise reduction shims, the caliper piston face, and the finger areas on the outboard side of the caliper.
You will probably have some brake noise. If you can live with that, go for it.

©, 2021 Rick Muscoplat



Posted on by Rick Muscoplat


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