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Coolant issue

Discussion in 'Ask An Owner Operator' started by DimitriDimitrov, Jan 6, 2023.

  1. Jan 6, 2023 #1
    DimitriDimitrov

    DimitriDimitrov Bobtail Member

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    I have a 2017 VNL with D13 that has a small coolant leaking by the crossbar behind the oil filters. It runs normal with guages working correctly. However, It takes about a gallon of coolant every 4 to 500 miles. Occasionaly, there is a faint white smoke coming from the right side of the hood area as well. Problem is the leak is only visible after it has been driven. Once it is parked and the leaking has stopped, pressurizing the reservoir does not produce any more leaks. Any idea where it could be leaking from?
     
    DimitriDimitrov, Jan 6, 2023
    DimitriDimitrov, Jan 6, 2023
    #1
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  3. Jan 6, 2023 #2
    ducnut

    ducnut Road Train Member

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    Follow the trail of coolant. It leaves a residue, so should be easy.

    Better pull the EGR cooler inspection plate and make sure that’s not leaking, too. It’s very common on a D13. That’s a leak you can’t ever see/find, but, the truck is using coolant.
     
    ducnut, Jan 6, 2023
    ducnut, Jan 6, 2023
    #2
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  4. Jan 6, 2023 #3
    86scotty

    86scotty Road Train Member

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    I'm betting EGR too but I'd also check around the coolant filter. It's a known leak location (from the on/off valve) and is right above the oil filters.

    Have you touched that valve lately? They usually fail after being in one position for too long and the you move it and the O-ring gives out.
     
    86scotty, Jan 6, 2023
    86scotty, Jan 6, 2023
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  5. Jan 7, 2023 #4
    Siinman

    Siinman Road Train Member

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    My 2014 had a leak and was running into the fuel/ water separator. Had to replace that setup.
     
    Siinman, Jan 7, 2023
    Siinman, Jan 7, 2023
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  7. Jan 7, 2023 #5
    Keepforgettingmypassword

    Keepforgettingmypassword Heavy Load Member

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    Following
     
    Keepforgettingmypassword, Jan 7, 2023
    Keepforgettingmypassword, Jan 7, 2023
    #5
  8. Feb 13, 2023 #6
    DimitriDimitrov

    DimitriDimitrov Bobtail Member

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    ...so how much coolant should I lose a day if the egr cooler is bad? It was taking about a gallon every 4 to 500 miles but yesterday it took two gallons in a span of about 150 miles. I also notice more of it gets lost under load going uphill. The underside of the truck is wet from coolant splashing/spraying as it moves. Is there like a return hose or high pressure hose down there that could be cracked?
     
    DimitriDimitrov, Feb 13, 2023
    DimitriDimitrov, Feb 13, 2023
    #6
  9. Feb 13, 2023 #7
    Keepforgettingmypassword

    Keepforgettingmypassword Heavy Load Member

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    1) not much.
    2) find that leak before it gets expensive.
    If you see it under the engine. Then that leak is not in the egr and should be easy to find. Albeit do to weather you may not want to look for it.
     
    Keepforgettingmypassword, Feb 13, 2023
    Keepforgettingmypassword, Feb 13, 2023
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