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Coolant leak?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mikeboett, Jul 24, 2020.

  1. Jul 24, 2020 #1
    Mikeboett

    Mikeboett Bobtail Member

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    Jul 24, 2020
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    Alright so yesterday I started my day, all good just added a little coolant. Didnt think anything of it, today as i was waiting for relay driver to arrive my coolant level dropped, i thought odd shoulda been fine. Looked all around, noticed a good size puddle of coolant under truck. It was coming from a rubber hose on passenger side right above fuel tank. Its on a 2016 Kenworth T680. In about 80 miles i had to add a gallon of coolant. Any idea what may it be? Picture of hose added at bottom.
     

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    Mikeboett, Jul 24, 2020
    Mikeboett, Jul 24, 2020
    #1
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  3. Jul 24, 2020 #2
    Razorwyr

    Razorwyr Road Train Member

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    Which hose is it coming from? I see at least 3 in the picture. One looks like an overflow hose, so that shouldnt make you low.
     
    Razorwyr, Jul 24, 2020
    Razorwyr, Jul 24, 2020
    #2
  4. Jul 26, 2020 #3
    Lowboy456

    Lowboy456 Light Load Member

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    That open ended hose should be the overflow. Try tracing it back to the radiator cap.
    If its the overflow try a new radiator cap. If the cap works Great!
    If it starts burning coolant and smoking loads of white smoke with a new cap there might be other issues.
     
    Lowboy456, Jul 26, 2020
    Lowboy456, Jul 26, 2020
    #3
    baha Thanks this.
  5. Jul 26, 2020 #4
    uncleal13

    uncleal13 Road Train Member

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    Bunk heater hose?
     
    uncleal13, Jul 26, 2020
    uncleal13, Jul 26, 2020
    #4
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