I replaced my rear pads and rotors on Friday; I didn't notice that the new pads didn't include new hardware until I had the truck all apart, so I had to reuse the old hardware to get to work that night. Picked up new hardware today and when I pulled the wheels off I noticed a hole in the rotor that looks like a welding gouge:
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Basically what I want to know is whether this was a manufacturing defect in the rotor that I can get a replacement under warranty on Monday, or could I have done something to cause the damage, in which case I'll just grab a new one today.