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Thread: High coolant temperature

  1. #1
    Baby Twin
    Join Date
    Jul 2016
    Location
    Inverness
    Posts
    4

    High coolant temperature

    Out riding yesterday and everything was fine until I saw a red triangle warning light and coolant temperature went from 77c to 135c! Stopped bike waited 5 minutes then all returned to normal??
    Started up and rode 20 miles and it came on again. Seemed to be every time I turned a slow tight turn?
    Got home and checked all levels, fans coming on ok.
    Has anyone seen this before?
    Battery on an optimate , so no issues with battery.

  2. #2
    Baby Twin
    Join Date
    Jun 2015
    Location
    Norfolk, VA
    Posts
    4
    Could be a air bubble in your coolant system.

  3. #3
    Baby Twin
    Join Date
    May 2013
    Location
    Plymouth
    Posts
    36
    Has the coolant recently been changed/ topped up? If no, doubt it would be an air bubble. For the temperature to drop from 135 to normal in 5 minutes it would suggest that the temp wasn't actually 135, as it would take more than 5 minutes to drop 50.

    Would have a look at the temp sensor, thermostat and wiring if it happens again. You can test the temp sensor resistamce with bowl of hot water and multi meter. Check YouTube for how to video.

  4. #4
    Baby Twin
    Join Date
    Jul 2016
    Location
    Inverness
    Posts
    4
    Many thanks for your assistance. I kinda suspected that it may be a loose connection as the sensor failing would probably make it read high all the time.
    Any idea where the sensor is for the temperature reading. I know that there are 2, one for the fans and other for the indication.

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