Cooling fans, one or 2?
Results 1 to 7 of 7

This is a discussion on Cooling fans, one or 2? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; In normal city driving conditions how many fans should come on if the engine gets hotter and the car isn't ...

  1. #1
    Registered User WagonGuy's Avatar
    Join Date
    Sep 2005
    Location
    Chicago
    Posts
    585

    Cooling fans, one or 2?

    In normal city driving conditions how many fans should come on if the engine gets hotter and the car isn't moving fast enough to create an adequate air flow? One or two?
    I've noticed that the engine temp gauge goes beyond the maximum-minimum threshold for about 30 seconds and then drops in slow traffic situations. Trying to replicate it reveled that only one (left side) fan comes on.
    Is that normal or should both the fans kick in?

    Thanks...
    Blobeye Syndicate #1337
    man vs technology blog
    MvT@YouTube

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Registered User rr1911's Avatar
    Join Date
    Nov 2005
    Location
    Central Florida
    Posts
    0
    its normal for only one to come on forgot why
    Army Ranger For Life ! Thin Blue Line
    Military Militia # 1911/ Blobeye Syndicate # 1911/ Modifier's Anonymous # 1911/ Hawk-Eye Alliance # 1911
    All We'll Drive
    DIFFERENT STROKES
    EVEN MY DENTIST TOLD ME FLOSS 7 DAYS A WEEK
    POST WH0RE KING

  4. #3
    Registered User WagonGuy's Avatar
    Join Date
    Sep 2005
    Location
    Chicago
    Posts
    585
    So if only one comes on what's the second one for?
    Blobeye Syndicate #1337
    man vs technology blog
    MvT@YouTube

  5. #4
    He simply abides. SD_GR's Avatar
    Join Date
    Jul 2002
    Location
    CA, US
    Posts
    22,290
    I Support ClubWRX
    One comes on if the A/C and/or the front defog aren't on. Two come on otherwise.
    WRX Info Links, Courtesy TheJ
    The world breaks everyone and afterward many are strong in the broken places. Ernest Hemingway
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

  6. #5
    Registered User
    Join Date
    Apr 2005
    Location
    Brooklyn, NY
    Posts
    39
    both will come on if the engine gets to its warm point.
    Also if the a/c is on.
    But if you are moving in traffic (like 3k rpms in first or second gear)
    only 1 fan will kick on once in while.
    Thats why i only hear a low fan noise when looking for parking in a lot.
    But if the engine gets warm both will go on regardless.
    My observations.

  7. #6
    Registered User
    Join Date
    Jan 2005
    Location
    Canada B.C.
    Posts
    1,393
    Quote Originally Posted by WagonGuy View Post
    In normal city driving conditions how many fans should come on if the engine gets hotter and the car isn't moving fast enough to create an adequate air flow? One or two?
    I've noticed that the engine temp gauge goes beyond the maximum-minimum threshold for about 30 seconds and then drops in slow traffic situations. Trying to replicate it reveled that only one (left side) fan comes on.
    Is that normal or should both the fans kick in?

    Thanks...
    I don't think I have ever seen my temp gauge move from the usual warmed up position. Check your water level, and maybe "Burp" the coolong system. And yes, normaly just one fan comes on unless the AC is on.
    '02 WRX 4EAT, 311,000KMs/194,500Miles, Sold. Best car I ever had. '09 STi stage 1, hope this one will be good too...

  8. #7
    Registered User WagonGuy's Avatar
    Join Date
    Sep 2005
    Location
    Chicago
    Posts
    585
    Quote Originally Posted by wrxdrvr View Post
    I don't think I have ever seen my temp gauge move from the usual warmed up position. Check your water level, and maybe "Burp" the coolong system. And yes, normaly just one fan comes on unless the AC is on.
    Burping it worked. More details here Overheating
    Blobeye Syndicate #1337
    man vs technology blog
    MvT@YouTube

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •