Is my car fine to drive with with the rotors like this?
First off I have a 1999 Ford Contour SE with ABS. When I brake, the brake pedal pulses and the car shudders. Yesterday I measured the rotors and this is what I found (the tone rings looked fine so I'm not worried about that). Also the lug nuts were definitely over-torqued because I could barely break them lose and we figured out it only needed to be torqued to 62 which was easy. Could the over torquing could have caused it?
Passenger front rotor
Runout.004
Thickness.869.867
Driver side front
Runout.0025
Thickness.863.862
Is it safe? It doesn't bother me that much that it pulses and shudders but I just want to get somone elses opinions.
I don't know what judder is but disc brake shudder means the pads aren't making consistent contact with the disc. My best guess is the disc was over-heated and warped at some time. After making sure your lug-nuts are properly torqued you may find that you need the disc ground or even replaced. They aren't that expensive and are easily replaced.
I read flagmichael's link about Judder and I find absolutely no mention of lug nut torque as a cause of Judder. But, sooner or later the judder will cause failure of the lugs and you risk a wheel coming off. No one can predict when.
Overtorquing is top of the list for the judder; I have had much less trouble with judder since making a point of always using a torque wrench on wheels with disk brakes. It is safe to drive either way, just unpleasant. Your tire will not fall off from that… I have no idea where that came from.
The first source is the best single writeup I have seen on disk brake judder.
I'd definitely only stick to city streets. Avoid freeways or highways until you can get it fixed. Otherwise, when your tire falls off (which it will eventually do) you'll get into one helluva accident. Don't want that.
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