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Turboed and rad fan not turning on?

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    #1

    Turboed and rad fan not turning on?

    So yeah I have a turboed civic. and well it was overheating.. I replaced the thermostat and thought hey that would solve problem which it did.

    But here, when i have car on, the Rad fan never turns on at all..... It works if i put the AC on.. but other then that no.

    Why is this?


    also its leaking collant all over the place from eaither the rad cap or overfill cap. Not really sure.

    it's getting super annoying and i need this fixed?

    any ideas?
    Tags: None
    #2
    theres 2 fans, one for the engine...turns on when engine gets to a certain temp....the other fan comes on when the a/c is on.

    Comment

      #3
      Originally posted by Maple50175 View Post
      So yeah I have a turboed civic. and well it was overheating.. I replaced the thermostat and thought hey that would solve problem which it did.

      But here, when i have car on, the Rad fan never turns on at all..... It works if i put the AC on.. but other then that no.

      Why is this?


      also its leaking collant all over the place from eaither the rad cap or overfill cap. Not really sure.

      it's getting super annoying and i need this fixed?

      any ideas?
      Maple - You just posted a thread on going turbo, now I see this . . .
      First place to look is your coolant leak - If the radiator fan thermoswitch doesn't have any coolant going over it, it's not going to know how hot it is will it? So it will never switch the fans on (water/coolant induces heat faster than air)
      Fix the coolant leak first then diagnose the fans not turning on.


      Car Safety / General Servicing Checks --------Basic suspension checks

      My 5.7 LS1 Holden Ute

      A "Finished" project car is never finished until its been sold.

      If at first you don't succeed, Try again. Don't give up too easily, persistance pays off in the end.

      Comment

        #4
        Have you already checked fuses and relays? Thrown power to the non working fan to make sure the motor still runs? Checked to see if it's even plugged in?

        Comment

          #5
          Originally posted by visualpoet View Post
          Have you already checked fuses and relays? Thrown power to the non working fan to make sure the motor still runs? Checked to see if it's even plugged in?


          Yes its plugged in and like i said it works with the AC so I know the motor is not bad.

          Comment

            #6
            Originally posted by evil_demon_01 View Post
            Maple - You just posted a thread on going turbo, now I see this . . .
            First place to look is your coolant leak - If the radiator fan thermoswitch doesn't have any coolant going over it, it's not going to know how hot it is will it? So it will never switch the fans on (water/coolant induces heat faster than air)
            Fix the coolant leak first then diagnose the fans not turning on.

            you cannot find the leak its eaither comming from the radiator cap or overflow... and i hear boiling in the rad lines.. could it be air?

            I mean i have no bleeder for my civic you kinda have to let it run then keepfilling with coolant and let the air come out of cap...

            Comment

              #7
              Originally posted by Maple50175 View Post
              Yes its plugged in and like i said it works with the AC so I know the motor is not bad.

              Do you only have one fan? I've got two, one comes on when the AC is on, the other one comes on when the engine gets hot. The AC fan will not come on because the engine gets hot, it's slaved to the AC system to prevent overheating. Check the other one, that's the one you're having problems with.

              Comment

                #8
                Originally posted by Maple50175 View Post
                you cannot find the leak its eaither comming from the radiator cap or overflow... and i hear boiling in the rad lines.. could it be air?

                I mean i have no bleeder for my civic you kinda have to let it run then keepfilling with coolant and let the air come out of cap...
                Sounds like it could be a blown headgasket, or the water pump not cycling the water round if you can feel the coolant boiling/blowing bubbles.
                Last edited by evil_demon_01; 09-06-2008, 05:40 PM.


                Car Safety / General Servicing Checks --------Basic suspension checks

                My 5.7 LS1 Holden Ute

                A "Finished" project car is never finished until its been sold.

                If at first you don't succeed, Try again. Don't give up too easily, persistance pays off in the end.

                Comment

                  #9
                  Originally posted by visualpoet View Post
                  Do you only have one fan? I've got two, one comes on when the AC is on, the other one comes on when the engine gets hot. The AC fan will not come on because the engine gets hot, it's slaved to the AC system to prevent overheating. Check the other one, that's the one you're having problems with.


                  no, when I put the AC on the AC fan AND the radiator fan come on.

                  Comment

                    #10
                    Originally posted by evil_demon_01 View Post
                    Sounds like it could be a blown headgasket, or the water pump not cycling the water round if you can feel the coolant boiling/blowing bubbles.

                    wouldn't i have coolant in my oil though? I have None.

                    Comment

                      #11
                      Originally posted by Maple50175 View Post
                      wouldn't i have coolant in my oil though? I have None.
                      Not necessarily.


                      Car Safety / General Servicing Checks --------Basic suspension checks

                      My 5.7 LS1 Holden Ute

                      A "Finished" project car is never finished until its been sold.

                      If at first you don't succeed, Try again. Don't give up too easily, persistance pays off in the end.

                      Comment

                        #12
                        yup prolly blown headgasket causing exhaust gasses getting into the cooling system,causing ur bubbling issue in the hoses,also causing coolant not toget to the switch and turn ur fan on...u can test this with a kit, but i dunno where to get one other than a tool truck like snapon...good luck
                        Lost Motion Inc. Repair and Performance Automotive

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