Quote:
Originally Posted by mechanicalmoron
If he doesn't have a pulsation or wheel wobble under hard braking, the rotors are NOT warped, and it has NOTHING to do with impact wrenches.
However, a rotor could be damaged or defective in a way that allows or forces mis-centering, defective new parts are relatively common. If you can isolate the feeling to one side, swap rotors and see if it changes.
Natural resonances can do really nasty things with bad dampers, and even with fine dampers the 240 has some weird unpleasant crap that the stock suspension causes - you know how they say it has McPherson suspension for "performance" or "handling"? What they mean is, for the bare minimum handling performance that's acceptable, as opposed to good suspension designs...
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Warped rotors can be felt without braking especially at high speeds, yet is more readily felt under braking no doubt.
A badly warped rotor can feel like an unbalanced wheel at cruising.
Ex: Ever notice how nice and smooth a car rides after a full brake job?
And using an impact on wheels unless you are using a torque stick is the number 1 cause of warped rotors. Ask any reputable tech or google it.
If you have a micrometer you can check your rotors easily.
And the only defects in parts that Id say are "common" mostly occur in the cheap stuff and no name brands that have poor quality control
Let us know if you find the culprit as im curious, sorry to high jack but I couldn't help but respond to what that guy posted