I worked for Buick for 5 years and had several classes on ABS. The warping of rotors generally occurs when an excessively hot rotor comes in contact with water. When washing your vehicle avoid spraying water directly on brakes and avoid driving through water in roadway after moderate to hard braking. The best thing you can do is just practice good braking habits.
Oh, and the groaning is a sure sign of hard braking in heavy water conditions, causing pads to glaze. You can try sanding the glaze off the pads with a medium emery cloth.
Last edited by urbanassault; 10-29-2002 at 02:19 PM.