Water temp help

Discussion in 'Ask An Owner Operator' started by Mohtrucker, Jan 13, 2021.

  1. Mohtrucker

    Mohtrucker Light Load Member

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    Oct 20, 2019
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    I have a 05 Columbia with a series 60 engine when I’m at highway speeds my water temp gauge goes down to 100 degrees but when sitting idling it will go to above 150. My ac/heater will stop working also but works fine when idling, appreciate any advice I don’t want to pay someone money if it could be solved by changing a sensor or fuse
     
    6wheeler Thanks this.
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  3. Spyro2112

    Spyro2112 Medium Load Member

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  4. Spyro2112

    Spyro2112 Medium Load Member

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  5. thaistick

    thaistick Road Train Member

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    Second for the thermostats!!!
     
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  6. Spyro2112

    Spyro2112 Medium Load Member

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    Might think about new fluid, radiator,, detroit radiator. Michigan
     
  7. Johny41

    Johny41 Road Train Member

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    My guess the thermostat stuck open, coolant goes through rad all the time. When you move at highway speed the airflow passing through rad is overcooling the coolant, when stopped even if the thermostat stays open without airflow temp goes higher. I read that are designed if breaks to fail open, is less damaging won't cause overheating. But if the thermostat is stuck open , engine oil temp drops and moisture won't evaporate can mix with oil causing sludge and for newer engines with DPF low eng temp causes regen problems.
     
    Last edited: Jan 14, 2021
  8. Spyro2112

    Spyro2112 Medium Load Member

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  9. Ridgeline

    Ridgeline Road Train Member

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    It isn’t anything but the thermostat. One is bad and stuck open.
     
    lester and Mohtrucker Thank this.
  10. snowwy

    snowwy Road Train Member

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    Thermostat is what controls the water temp.
     
  11. Spyro2112

    Spyro2112 Medium Load Member

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    Thermostat opens and closes to cool the engine. Fan turns on
     
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