Q: Should You Reface the Brake Disc with Every Brake Pad Replacement on 2000 Dodge Viper?
A: Even though refacing a brake disc isn't necessary each time the brake pads are changed, it needs to be done when the disc shows signs of large score marks, warping, rough braking or when the brake pedal felt pulsating. When a disc is damaged, it should be machined on the car with a hub-mounted brake lathe or just replaced. A brake lathe mounted directly to the vehicle helps prevent more than the acceptable amount of runout and improves the fit of the disc to the hub and bearings. The minimum thickness that the brake disc should not be machined below is cast on an unmachined surface and is indicated with markings on all discs. Don't machine the disc to a thickness lower than what is specified. Make sure the face of the disc and the adapters are unharmed by chips, rust or any kind of contamination before installation. As you are using the brake lathe, visually check you are using it correctly based on the manufacturer's directions and cut both sides of the brake disc together to prevent making a tapered or uneven cut. When refacing, care must be taken to make sure the TIR and thickness variation limits are observed, by carefully operating rotor turning equipment.