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  1. Join Date
    Nov 2005
    Posts
    7,976
    #4
    Yes, it(a.k.a aux fan) sucks the air from outside. It passes thru the

    radiator, therefore it helps lower the coolant temp inside the radiator.

    As per the fan connected to the engine, it's also designed to suck

    outside air inward to cools down the engine.
    Last edited by XTO; November 16th, 2006 at 05:14 PM.

Rad Fan airflow direction