I know this is gonna sound crazy, but believe it or not, using an impact wrench or similar air tool to tighten lug nuts can cause severe rotor warp. I had a Ford Crown Victoria, and while I was away on business my wife bought me new tires from one of those tire-depot type places, and they bucked the lug nuts on with an air rachet. Six weeks later my rotors looked like soup bowls. Part of that I'm sure is not utilizing the pattern to tighten evenly, but it ended up costing me a couple hundred bucks to replace the rotors.
Wednesday, July 15th, 2009 AT 6:52 AM