Hey guys and dolls! I have read a few posts and threads about front end vibratins and noticed that nobody has seemed to check runout. When replacing a rotor, front or rear, if the surface of the bearing where the disc sits, isn't free of rust or even slight height imperfections, it will cause a situation of runout. Happened to me and that was all it took. Everyting else was fine for alignment and balance and m/m's etc... Make sure that when replacing the rotors a good solid cleaning of the mating surfaces is done. It will prevent a lot of frustration!
#22851, "RE: Vibrations of front end" In response to Reply # 0
yup. everyone like to assume vibration = warped rotors. that's prolly least likely to be the cause. my car vibrates but i'm pretty sure the hats on my 2 piece rotors are kinda messed up. they never seated flush to the hub to being with an just got worse over time...
#22852, "RE: Vibrations of front end" In response to Reply # 0
Originally posted by RickyMeeses Hey guys and dolls! I have read a few posts and threads about front end vibratins and noticed that nobody has seemed to check runout. When replacing a rotor, front or rear, if the surface of the bearing where the disc sits, isn't free of rust or even slight height imperfections, it will cause a situation of runout. Happened to me and that was all it took. Everyting else was fine for alignment and balance and m/m's etc... Make sure that when replacing the rotors a good solid cleaning of the mating surfaces is done. It will prevent a lot of frustration!
Doesn't the rust burn off?
Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician
#22864, "RE: Vibrations of front end" In response to Reply # 3
Yes That is what I was referring(?) to. The hub faces to the hat mating areas. Otherwise the rust isn't really an issue except being an eyesore when you have rims worth looking at!
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