Hi all, I was changing the oil in my 825, and while the engine was idling and warming the oil, I noticed that the radiator fan pushes air through the radiator from the engine side and does not "suck" air through the radiator from the outside. The radiator was replaced in 2004 by the previous owner. Is this the way the air is supposed to pass through the radiator or did the radiator fan get put on backwards? thanks Steve A.