Question about 1998 Cadillac Seville

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Cooling fan direction??

My 1999 Seville SLS is overheating i changed water pump thermostat and coolant recovery tank cap possible head gasket problem according to dealer, but i found that only one of the fan turns on and the temp goes back to normal unless im driving, i noticed the the 2nd fan does not turn on at all, and when the other one stops turning the second fan moves a little in the opposite direction of the first fan, are both fans supposed to be turning in the same direction?

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  • juicedfbody Feb 17, 2009

    I imagine it does have not checket but i will tomorrow morning, earlier i did see 3 relays marked cooling fan #1 and cooling fan #2 a third one was marked cooling fan also but cant remember if it was 1 or 2 but none of the three were marked A/C.

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Yes, Massive air flow from the first fan is causing air to be brought in from not only the front of the radiator but from the fan right next to it causing reverse air flow through the fan. This intern can cause less dirrect airflow through the radiator. Also, the recirculation of hot air (from the first fan) into the second fan, across the radiator and back to the first fan can cause the vehicle to run hotter. Wile the car is moving there is enough air pressure from the outside of the vehicle to flow directly through the radiator with little fan assistance needed. If you have the engine running and and turn on the a/c, you should hear the fan change speed or even see the second one turn on (If the fan is working), there is no delay. You might have a bad relay and good fan, as there is a separate relay that activates this same fan for the a/c.

Posted on Feb 17, 2009

  • Marco Avila
    Marco Avila Jun 03, 2010

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