159 2.4 20007 plate
19,500 DPF/EGR by
AO Silver Member
Join Date: May 2009
Location: United Kingdom
Read up on imprinted discs. What happens is that the sticking piston causes the disc to overheat. When you park the car the pad remains touching the overheated disc and leaves a coating of pad stuck to the disc at that point. This point is now higher friction than the rest of the disc and slightly thicker. Now when you drive the car as the wheel routes and you apply the brake the slightly thicker area and higher friction point makes the brakes judder and most people mistake it for a warped disc.
If you have caught it early and the disc isn't bent there is a way of curing it but not one I would put on an open forum. PM me if you want to try it.
Note: if it is really bad it can't be saved.
Last edited by kandlbarrett; 30-05-15 at 08:23.