Vector3.new() without value still rotating?

I am trying to make a car destruction script where if the vehicle hits something it rotates the part of the vehicle kind of like Car Crushers 2's destruction but I ran into a problem, the parts seem to be moving way to much even if i set it to a super small value, and I figured out that even if the Vector3.new() had no value the it would still rotate the part, if you wanna see what I mean just put this script into a part script.Parent.Orientation = Vector3.new() and it will still rotate, how can I stop this