I updated my radiator to a SVE aluminum radiator and had some clearance issues reinstalling a Lincoln Mark VIII radiator fan to it. The shop shaved down some of the metal tabs, they look like little triangles in a circular pattern on the center of the fan. In the process, one of the fan blades cracked at the top and was glued back together. Once reinstalled the fan worked but now it causes a vibration through out the car when it comes on. You can feel it through the steering wheel, shifter...

Lincoln Mark VIII Electric Radiator Fan Problem