Does anyone know what the min/max clearances between the fan blades and the radiator are?
They vary from just enough to Ouch! Most fans will run about 1/4 inch to slightly larger gap.
Good timing on this question! I hope my mounting parts come in before the weekend!
I don't know if there is an actual factory clearance, some instructions on bending pitch on blades, but I have checked my cars and the brass 16 is 1" and the 26 and the 27 are 3/4"