Thinking that the very loud noise was coming from a worn pulley wheel, after elimating all other possible causes, I removed the belt and pulley wheel. There was only a slight movement when the wheel was bolted on but after removing the bolts the wheel has a notably slightly more movement when the bolts are removed. More of a waggle if that makes sense. Should the wheel be a tight fit on the spline? I want to be sure before I buy a new wheel.