The first thing to look at is putting the wheels back on. It's critical to use a click-type torque wrench and the lug nuts must be tightened to the specified setting. Uneven tightness causes uneven clamping forces. With repeated heating and cooling cycles that leads to warped rotors.
New rotors also often warp, especially those made in China. There's nothing wrong with how they're made but when we make parts out of cast iron we let them age 90 days before they get their final machining. The Chinese parts are cast, packed, and shipped right away, then they age on your car. Usually one light machining by the shop that did the brake work is all that's needed and is nothing out of the ordinary.
Thursday, February 21st, 2019 AT 3:30 PM
(Merged)
