Buick Century
Jeep Grand Cherokee Laredo
Grand Am SE

What would cause a 94 buick century's lug threads to break in half?


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Usually caused by over torqueing the wheels. If the wheels keep gettign changed over and over and the wheel lugs are tightened by an air gun, sometimes the air guns are set at too much torque and it puts too much strain on the studs and before long either the wheel breaks or the lug and it's usually the lug. When you have wheels put on your car, ask the person doing it to hand tighten the lugs using a torque wrench. If you hear the air gun hammering on the lug nuts that is usually when the damage is occuring. It is possible you coudl have hit a large hole with the wheel and the lug took the shock and broke off, but overtightening lug nuts is a major cause of broekn lugs