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  • Radiator fan and temp gauge questions

    Got stuck in traffic today and the temperature needle got over the red section at the far RH of the gauge. Was almost over the "H". And the fan never came on...
    From memory, the fan is supposed to engage about at the ¾ of the needle's travel; Am I right to think so?

    Later today, I jumped both connectors on the thermostat and the fan came on instantly. From this I suspect the fan switch to be defective. Any thought or confirmation?

    Also, I think there are some automotive switches that bolt right on and that are quite less expensive than OEM Kawasaki ($75 !!). Anyone remember what automotive replacements are usable on the ZX-11?

    Finally, when replacing the switch, is there some coolant loss at the radiator or it is negligible?

    Thanks!

  • #2
    Re: Radiator fan and temp gauge questions

    Check around, as I'm sure there are plenty of different switches that would work. You might as well flush it out while you're in there. I've had temp probes that just poke through the rad fins. Cheap and painless.
    KN, this ride's for You.

    http://i415.photobucket.com/albums/p...ps2ecwj35m.jpg

    Comment


    • #3
      Re: Radiator fan and temp gauge questions

      I replaced the fan switch on the R1 so that the fan came on at a lower temperature. I used one for an older Accord.

      The issue when replacing it is likely to be the connectors on the switch. Might be easiest to pull the old one out and take it to an auto parts shop to match it.

      How much coolant you lose depends on where the switch is. Leave the radiator cap on and it should drain slowly.
      "You don't get slower with age, you just get more cautious." Michael Rutter

      06 Ocean Blue ZZR1200, the coolest colour.
      99 Yamaha R1

      Comment


      • #4
        Re: Radiator fan and temp gauge questions

        Bought this yesterday: http://www.ebay.ca/itm/ZZR400-ZZR110...72.m2749.l2649

        Thanks for your comments!

        Comment


        • #5
          Re: Radiator fan and temp gauge questions

          Another option would be to install a manual bypass switch where if the automatic one doesn't
          kick in you can turn those fans on manually. I used to do this on all my hotrods because you
          have too much to loose if these run hot. Come to think of it, I think I'll install one on my
          on Zed, practice what you preach, right?
          "If it ain't broke, don't fix it...
          but sometimes it just needs a mod"

          Comment


          • #6
            Re: Radiator fan and temp gauge questions

            Originally posted by CHARLIE View Post
            Another option would be to install a manual bypass switch where if the automatic one doesn't
            kick in you can turn those fans on manually. I used to do this on all my hotrods because you
            have too much to loose if these run hot. Come to think of it, I think I'll install one on my
            on Zed, practice what you preach, right?
            Zzz
            "You don't get slower with age, you just get more cautious." Michael Rutter

            06 Ocean Blue ZZR1200, the coolest colour.
            99 Yamaha R1

            Comment


            • #7
              Re: Radiator fan and temp gauge questions

              Is it needed to use teflon tape on the fan switch threads when installing the new one?

              Comment


              • #8
                Re: Radiator fan and temp gauge questions

                Originally posted by Claude View Post
                Is it needed to use teflon tape on the fan switch threads when installing the new one?
                You should use something - Teflon tape if that's what you have.
                "You don't get slower with age, you just get more cautious." Michael Rutter

                06 Ocean Blue ZZR1200, the coolest colour.
                99 Yamaha R1

                Comment


                • #9
                  Re: Radiator fan and temp gauge questions

                  Originally posted by Moise View Post
                  You should use something - Teflon tape if that's what you have.
                  What else can be used if not teflon tape? Just curious...

                  Comment


                  • #10
                    Re: Radiator fan and temp gauge questions

                    Liquid teflon. It comes in a can with a brush.
                    KN, this ride's for You.

                    http://i415.photobucket.com/albums/p...ps2ecwj35m.jpg

                    Comment


                    • #11
                      Re: Radiator fan and temp gauge questions

                      Just about any sealer would do. It's low pressure and temp.
                      "You don't get slower with age, you just get more cautious." Michael Rutter

                      06 Ocean Blue ZZR1200, the coolest colour.
                      99 Yamaha R1

                      Comment


                      • #12
                        Re: Radiator fan and temp gauge questions

                        I've been mentionned that the switch could need to ground to the radiator and that teflon tape could act as in insulator. Any thought about this?

                        Comment


                        • #13
                          Re: Radiator fan and temp gauge questions

                          Originally posted by Claude View Post
                          I've been mentionned that the switch could need to ground to the radiator and that teflon tape could act as in insulator. Any thought about this?
                          Um, the switch has 2 terminals so that wouldn't be an issue.
                          "You don't get slower with age, you just get more cautious." Michael Rutter

                          06 Ocean Blue ZZR1200, the coolest colour.
                          99 Yamaha R1

                          Comment


                          • #14
                            Re: Radiator fan and temp gauge questions

                            Originally posted by Moise View Post
                            Um, the switch has 2 terminals so that wouldn't be an issue.
                            That make sense. Thanks for your comments (all the other members too of course!!)!!

                            Comment


                            • #15
                              Re: Radiator fan and temp gauge questions

                              I had a '90 ZX-10 and needed a manual switch in heavy traffic......keep it cool baby

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