Quote:
Originally Posted by PaulE
When I had an issue with "warped" rotors on my daily driver, I came across this article - Warped Brake Discs and Other Myths of the Braking System, The author says discs don't warp, but pad material accumulates irregularly around the disc surface which is what the disc runout really is. |
This occurs when you run two different pad compounds on the same rotor. If the compounds are not compatible - then you can get a lot of irregular accumulation of pad material. One way to get it off is to use a very abrasive pad - such as a Hawk blue and drive the car with the brakes cold and dragging the brakes.