Push or Pull through the radiator? | FerrariChat

Push or Pull through the radiator?

Discussion in '308/328' started by raines, Sep 21, 2020.

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  1. raines

    raines Karting

    May 7, 2004
    147
    Raleigh, NC
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    Randy
    #1 raines, Sep 21, 2020
    My fans were making this horrendous noise louder than the engine itself (seemed like it anyway). I know the motors need servicing, but I also noticed the fans were blowing away from the radiator or pulling air through. Is this normal? From a previous thread I believe it should be pushing. If push is correct, what is the easiest way to change this? Would pulling air have a damaging affect to the fan motors (making them work against air flow)? Thx!
     
  2. thorn

    thorn F1 Rookie
    Silver Subscribed

    Aug 7, 2012
    3,322
    Tallahassee, FL
    #2 thorn, Sep 21, 2020
    In a 308, the fans are pushers. Pulling the air would work against the natural airflow coming into the radiator - thus, a bad idea.
     
    waymar likes this.
  3. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
    Owner Rossa Subscribed

    May 4, 2001
    35,345
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    Tommy
    #3 Dr Tommy Cosgrove, Sep 21, 2020
    Fans should be blowing air at the radiator.
     
  4. Dr Tommy Cosgrove

    Dr Tommy Cosgrove Three Time F1 World Champ
    Owner Rossa Subscribed

    May 4, 2001
    35,345
    Birmingham, AL
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    Tommy
    #4 Dr Tommy Cosgrove, Sep 21, 2020
    That's crazy.

    I know you can reverse the polarity on aftermarket fans to reverse direction but I didn't know these factory units would do it if hooked up in reverse by accident.

    WTF?
     
  5. Alex308qv

    Alex308qv Formula Junior

    Jul 1, 2016
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    Alex
    #5 Alex308qv, Sep 21, 2020
    May be helpful when driving at high speeds in reverse.
     
  6. Brian Harper

    Brian Harper F1 Rookie
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    Feb 17, 2006
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    San Jose area
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    Brian Harper
    #6 Brian Harper, Sep 21, 2020
    I hadn't thought of that. A relay driven off of the backup light circuit could change fan direction based on direction of travel. I think I need this mod!
     
    Saabguy likes this.
  7. 4right

    4right F1 Rookie
    Rossa Subscribed

    Sep 14, 2008
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    US/Japan/Singapore/Canada/US
    #7 4right, Sep 23, 2020
    Funny timing of this thread. About two weeks ago, I realised that one fan is pushing and the other fan is pulling. Not sure that I have ever seen this before. My assumption is that the one fan that is pushing is simply wired backwards. The fans have never been out during my ownership, six years now.
     
  8. raines

    raines Karting

    May 7, 2004
    147
    Raleigh, NC
    Full Name:
    Randy
    #8 raines, Oct 3, 2020
    Well, turns out the fans were hitting the plastic housing (Porsche part- I know...). Anyway, reversed polarity by switching the wires on both fans. Had to ease tension on the housing to alleviate scraping and is now running great!
     

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