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Coolant temp sensor

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Cajuncowboy654, Aug 2, 2019.

Page 1 of 2
  1. Aug 2, 2019 #1
    Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    Is it possible to change the coolant temp sensor on a c-15 acert without pulling the thermostat housing?
     
    Cajuncowboy654, Aug 2, 2019
    Cajuncowboy654, Aug 2, 2019
    #1
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  3. Aug 3, 2019 #2
    Goodysnap

    Goodysnap Road Train Member

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    Sure is. Access from the front. Changing the sensor is the easy part. Getting that stupid red lock unlocked on the connector is a PITA. But not nearly impossible. Radiator hose hook/pick is what I use on the connector.
     
    Goodysnap, Aug 3, 2019
    Goodysnap, Aug 3, 2019
    #2
    spsauerland, Dino soar, Cajuncowboy654 and 2 others Thank this.
  4. Aug 3, 2019 #3
    Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    Thanks. Mine doesnt have the red locking tab.

    I just swapped thermostats last weekend, so dont want to have to pull it all apart again.

    Finding out the guy I bought the truck from was really good at hiding stuff.

    Tild me they had but 150° thermostats in, but he had the correct ones just never changed them.

    Figured that's why my coolant stays around 150, nope. Get in and it's the 190s that are supposed to be in there.

    So hoping it's just the sensor that isnt reading correctly
     
    Cajuncowboy654, Aug 3, 2019
    Cajuncowboy654, Aug 3, 2019
    #3
  5. Aug 3, 2019 #4
    AModelCat

    AModelCat Road Train Member

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    I'd hit the housing where the sensor is with an IR temp gun first. That'll tell you if its truely a temperature problem or an instrumentation problem. Don't spend money on parts if you don't have to is how I see it.
     
    AModelCat, Aug 3, 2019
    AModelCat, Aug 3, 2019
    #4
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  7. Aug 3, 2019 #5
    Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    The scenario that got me worried today is I was coming down a bridge and takin an exit with a sharp turn. So I was slowing with my jakes, when I got to the bottom I got a windshield full of steam.

    Pulled over raised the hood and no busted lines but could tell the coolant must have boiled over, but gauge was still sitting on 150.

    I need to get this figured out because I cant even tell how hot it's running
     
    Cajuncowboy654, Aug 3, 2019
    Cajuncowboy654, Aug 3, 2019
    #5
  8. Aug 3, 2019 #6
    spsauerland

    spsauerland Road Train Member

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    What year truck we talking? An early ACERT might use coolant temp sending unit that is from truck builder vs the Cat coolant temp sensor.
     
    spsauerland, Aug 3, 2019
    spsauerland, Aug 3, 2019
    #6
  9. Aug 3, 2019 #7
    Cajuncowboy654

    Cajuncowboy654 Light Load Member

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    05. MXS
     
    Cajuncowboy654, Aug 3, 2019
    Cajuncowboy654, Aug 3, 2019
    #7
  10. Aug 4, 2019 #8
    lwlevens

    lwlevens Medium Load Member

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    Like someone already said when the truck hits 150 hit it with a heat gun and see where the temp is.
     
    lwlevens, Aug 4, 2019
    lwlevens, Aug 4, 2019
    #8
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  11. Aug 4, 2019 #9
    062

    062 Road Train Member

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    Look at the corners of your radiator for any dampness. Most likely to see it on the back side just from air flow.
     
    062, Aug 4, 2019
    062, Aug 4, 2019
    #9
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  12. Aug 4, 2019 #10
    spsauerland

    spsauerland Road Train Member

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    In what make of truck?
     
    spsauerland, Aug 4, 2019
    spsauerland, Aug 4, 2019
    #10
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