Klownicle, I'm having the same trouble. So what part did you buy exactly and where? I have a 2002 Isuzu Rodeo, just purchased with 180k miles. It had hit a deer so I've had to replace the radiator and grill, bumper, headlight. It is very loud, light a big woosh constantly. I know that isn't a normal sounds and you can tell its loosing power because of something over doing it. The fan is tight but still moves, but after reading this I am convinced this is it. My husband on the other hand says it doesn't make sense. Lol