View Single Post
Old 11-25-2012, 08:21 AM   #3
Registered User
Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 814
My Ride: 03 325xi, 01 325xi
Send a message via Yahoo to tomoyer
Usually only 2 reasons that rotors warp; either the lugs are too tight and not evenly torqued OR you have a brake caliper piston hanging up and creating too much heat on the rotor. A bad wheel bearing can also cause, but usually you will hear them.
Wheel lugs should be put on by hand, hand tightened with a torque wrench.
A caliper piston that is hanging up should show signs of heat discoloration (especially if you have painted the calipers).
tomoyer is offline   Reply With Quote