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      01-12-2016, 03:56 PM   #567
MightyMouseTech
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Drives: 13 135i 6MT LeMans Blue MSport
Join Date: Feb 2013
Location: Ottawa, Canada

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Quote:
Originally Posted by shark715 View Post
I'm surprised your shop machines rotors at all. I've noticed more and more shops don't want to machine rotors anymore as the rotors are being made thinner and thinner to reduce weight, and they are saying that machining often is just a temporary fix until the first time the rotor gets hot and warps again.
We do it all the time. Hardly replace rotors, usually good for the life of the car. Acuras tend to be less hard on rotors I guess. Most of our cars have a full 2mm between new and worn out. You can machine a rotor many times before you cut off 2mm, well, as long as you are doing it properly. Worked on a TSX not long ago that had 700,000 km, and still had the original rotors front and rear.

It is much more accurate to machine the rotors on the car, machining them on a lathe is not precise enough. When you do it on the car, it is taking into account the runout of the hub as well to make a surface that is running perfectly true.

Acura says we can ONLY machine them on the car for this reason.

I don't care how hard you drive the car, that will not warp a rotor. I have been heavily involved in racing for many years. Racecars don't warp rotors, and we literally get them glowing red. You may get terrible pad transfer from stopping the car with overheated hot pads, but not warped.

Last edited by MightyMouseTech; 01-12-2016 at 04:04 PM..
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