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Summary: Replacing brake rotors is necessary when the rotors cannot be machined. Find out when you should replace your brake rotors in this free brake job instruction video.
Mitch Jones has been working on cars as a hobby and made it into a career over the past 11 years. Jones specializes in European vehicles, but can fix most problems on any make and...read more
"Next we're going to talk about doing it whether you want to get the rotor machined or just totally replace it with a new one. This is fine like after maybe the first two times, that you have to change your pad surfaces, so just go ahead and put the pads on without having this machined. What happens over a time period, so much heat goes up, then the tolerance wears down and then you might get a little shimmy out of your steering wheel, whenever you do have a hard braking situation. What you want to do, you remove the rotor and take it to a brake shop, to have them turn it but usually, some individuals, may let their pads go to a certain extent to where there's a groove around the surface. Sometimes the groove may be thicker than its actual tolerance to have it turn, so once you have the rotor machined, it's out of its tolerance and it's basically no good, so that's when you would have to basically go and invest in a new rotor. They have different types of rotors that you can get. The basic plain surface, like this, or you can get a cross drilled rotor, which has holes, to vent the heat, which it kind of makes it to where your time period, of changing the rotor, is cut down. That's what you're going to have, dealing with cut rotors versus replacing it, with a total new rotor. "
eHow Article: Replacing Brake Rotors vs. Machining Rotors