Quote:
Originally Posted by CamaroCracka
I follow what you are saying about the pad material melting to the rotor and causing pulsing, but can you elaborate on rotors not warping? Certainly, the runout on a rotor can get out of spec, which is what I have always thought people meant when they said they had a warped rotor. You've mentioned this a couple times and I'm just not familiar with what you are referring to. I skimmed the articles, but I have seen rotors that are physically out of spec on runout as measured by a dial indicator. I'm not saying it was caused by heat, but one article mentioned non-metalic pads and modern resins, but rotors with excessive runout predate ceramic brake pads by decades.
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Any brake pad that has had the operating temp ceiling exceeded will melt onto the rotor.
What you measured is brake pad deposits on the face of the rotor.