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Has Anyone Gone Waterless Coolant on A 6.7 Cummins?

Discussion in 'Heavy Duty' started by Roosevelt, Feb 2, 2020.

  1. Amc3md

    Amc3md Junior Member

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    First post new to the forum.. I got a 2016 2500 about a month ago. After a week I got a coolant warning light saying it was low. Took to the dealer Coolant was indeed low added a little of the mopar coolant and they pressure tested and they said it had no leaks. Now a couple weeks later coolant is low again and warning light pops up. Warning light goes away after 1 min. Not getting hot as it’s cold out any ideas what this could be??

    just cold weather..
    Possibly reservoir tank mounted incorrectly from factory...
     
  2. crash68

    crash68 Senior Member

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    If your loosing a bunch of coolant and your not seeing any leaks from the water pump or anywhere else, it could be the EGR cooler or the turbo. Either one of those can leak and you not find any coolant leaking onto the ground.
     
  3. BossHogg

    BossHogg Senior Member

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    Good possibility it is an evaporative coolant leak,
     
  4. chri5k

    chri5k Senior Member Supporting Member

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    The totally closed system of the CTD has a nearly 0 evaporate loss rate. If the system is losing enough coolant to go from full to the low coolant light coming on in a "couple weeks" then there is a leak somewhere. If they can not find an external leak then it is most likely internal. The previous posts about EGR / turbo are good and I would add head gasket seepage. A chemical block test like this one from NAPA are very accurate at detecting head gasket leaks.

    https://www.napaonline.com/en/p/BK_7001006

    This page has a good write-up on testing for head gasket leaks. They have a step by step for the chemical test in the article.

    https://www.2carpros.com/articles/head-gasket-blown-test
     
  5. SouthTexan

    SouthTexan Senior Member

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    In the class 7-8 heavy duty industry I work in, most long haul trucks go 500k miles between coolant fluid changes.
     
  6. Amc3md

    Amc3md Junior Member

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    Thanks I have an appointment today with the dealer and will speak about what was said above keep you posted

    thanks again
     
  7. mtnrider

    mtnrider Senior Member

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    Have to ask, is the truck still stock or has it been tuned and deleted?


    .
     
  8. RamCares

    RamCares Senior Member

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    We certainly understand why this would be concerning, Amc3md. If you decide to address this with your dealer, please know that our team is more than happy to provide you with an additional layer of support for that process.

    Mark
    RamCares
     
  9. Amc3md

    Amc3md Junior Member

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    Pulling up to the dealer now it is bone stock no tune or delete
     
  10. Amc3md

    Amc3md Junior Member

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    They say I have a cracked reservoir tank seems odd as they claim to have pressure tested it about ten days ago and said it was fine then...

    thanks for the help then days from now we will see if the problem is truly fixed lol
     

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