I have replaced my front pads and had the rotors tunrnd, 40k miles. In less than 10k mile the rotors are warped again and I get the shudder when I apply the brakes. I need to have them turned down again but I do not know if there will be enough left and I do not know what causes such an early warping of the rotors.
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Re: warped front discs
Here is what happens to cause this, rotors are as thin as poss to reduce weight and increase MPG, when you turn them you remove material and make them even more prone to warping the less steel the less heat they can dissipate, the hotter they run the more the are prone to warp, if you tow something the problem is compounded. To avoid the same issue in the future replace the rotors with name brand new ones, use the best brake pads available, cheap pads can and do cause rotor problems. I worked as a tech for 30 years and this explanation is what I learned in many brake classes I went to and in shop with hands on experience.
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If the steering wheel is shaking when you apply the brakes, this is usually caused by the front rotors being warped, you can either replace the rotors (replace front brake pads as well) or if they measure thick enough, they may be able to be machined to recover a smooth - non warped surface again. Your local Auto Zone, Advance Auto Parts, or any other parts place usually can machine the rotors for you at a resonable price, but sometimes it is better to just replace them.... the thinner the get machined the less heat they will disapate and could possibly warp again after a few thousand miles.
sounds like the pads have worn down, or there's debris between the pads & rotor. in my personal experience, the stock rotors from hyundai don't hold up very well. i replaced pads (front and rear) at around 45K miles, and had the stock rotors turned down. less than 1K miles later, the front rotors were already warped! there have been many complaints about hyundai's rotors, so i replaced mine with a set of raybestos rotors and also put ceramic pads up front. 20K miles later, they're still working great.
Your rotors should be fine but it also depends on who turned the rotors and how they were done.Considering the dealer replaced the pads they probably used a metallic pad which have been known to be a noisy .Id suggest you have a repair shop resurface your rotors again and install some ceramic brake pads.
Its a good idea to turn your rotors if your putting on new pads so that you get a good seat. The steering wheel vibration may be your new pads wearing in and trying to find a good seat. Give it another 500 miles for break in period and if you still get the problem, then replace the pads with better ones and check to see if your rotors are not warped. Your pads will never seat correctly if your rotors are warped and make sure you use plenty of that shim goop they give you in the package before putting on the pads.
the front rotors are warped ahd either need to be turned or replaced. use quality parts and motorcraft pads. if you use cheap rotors, they stand the chance of either being warped upon install or warping soon after.
maybe the rotors are bigenuff and heat up too quick and warp but thats what they put on the car so youre out of luck,,,,you could put aftermarket rotors on it that are slotted and or crossdrilled which would greatly reduce the heat and your warping isue,,,,or maybe youre just too hard on the brakes,,try avoid sudden stops and braking at the last minute