I recently had a bad vibration that came from the rear of the vehicle. After looking at the tires I did notice loose lug nuts and had them tightened. After having all the wheels checked I was told that all tires had at least two cracked or broken bolts and I had them replaced. I certainly feel safer, but what would cause this to happen and how often should I have this checked?
When your tires are installed or rotated, over torquing or putting the lug nuts on too to tight can cause cracking. They could under torque causing them to be too loose. Also putting the tires on at an improper temperature can cause expanding and loosening. ( Maybe you need another mechanic to install and rotate your tires.)
〉 Answered on Apr 8th, 2013 by Colleen McGee, Driving Instructor at Americas Driving School