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!

:cheers

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... :(

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?

Originally posted by WickedESi

Doesn't the rust burn off?


he's not talking about on the rotor surface. anywhere on the hub which would prevent the rotor from sitting completely flush.

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!

:cheers