Stoptech 2 piece floating rotors rattle? Is it normal?

[Killa_dsm]

I'm actually posting this for a buddy of mine who has been recently hearing rattling noise from the front end of his car. After diagnosing it for him I tracked the rattle/clunking noise to his stoptech 2 piece rotors. You can only hear the sound when he hits bumps, yet when you press on the brakes lightly while hitting bumps the noise goes away.

I pulled his wheel off and noticed that his rotors move quite a bit. I know that floating rotors are suppose to move a little, but his rotors seems to move a lot in every direction. It moves at least half a millimeter easily just by lifting it with your hand.

So my question is, are 2 piece floating rotors suppose to move that much? Enough to rattle while driving around on the street?

Thanks

 

[TSiAWD666]

Mine don't rattle.

 

[Killa_dsm]

Well from doing some research I found out that the stoptech rotors have small spring washer type things to prevent the rotor from making noise. So I am guessing his are loose. I will be taking it apart for him in a couple of days, so we will see if thats the issue.

 

[Killa_dsm]

Just to update this thread for others who may have the same question later on. I torqued the drive pins on the rotors to spec 6ft/lbs and the noise did go away.