All this nonsense about "puller and pusher." There is ONLY ONE WAY that air should ever go through a CAR radiator, and that is from front (of the radiator) to back.

MAKE SURE the fan is the correct type and is turning the correct direction. You should be able to see this by looking at the fan blades. The will be "cupped" on one side, and this is the side that they should "pull" to (Blades are like wings--they are more efficient in one direction than the other) Some fans will change direction just by changing the wiring polarity, and they will NOT WORK WELL when reversed!!!!

I know nothing of the track record of the specific fan you have, it simply may not be enough