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Overheating 671ti

Discussion in 'Post Yacht' started by Posterboy91, May 21, 2018.

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  1. Posterboy91, May 21, 2018
    #1
    Posterboy91

    Posterboy91 New Member

    Joined:
    Oct 17, 2017
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    Location:
    Fort Lauderdale fl
    i have a starboard DD 671ti engine that overheated at cruise and went to 240 very quickly with the port remaining at 165. The heat exchangers were replaced 2 years ago so I am curious what else could be causing this issue and also since the Motor went that hot in temp what do I have to worry about now. I can say as soon as I took it to idle and out of gear it cooled off instantly. Thoughts?
  2. Capt Ralph, May 21, 2018
    #2
    Capt Ralph

    Capt Ralph Senior Member

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    You picked up some trash or the impeller is failing (or both).
  3. porthole, May 21, 2018
    #3
    porthole

    porthole Member

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    As above.
    I picked up a plastic shopping bag soon as I throttled up leaving Shark River inlet.

    Within seconds I went to overheat, shut down once outside and it cooled down fairly quick.

    Impeller was toast though.
  4. Pascal, May 21, 2018
    #4
    Pascal

    Pascal Senior Member

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    240 is very hot, I wouldn't be surprised if you have damage. Check the oil and coolant level carefully, as well as exhaust hoses. If you lost raw water flow long enough for coolant to get to 240, there is likely exhaust damage. Don't you have exhaust exhaust temp alarms?

    Check the impeller, strainer etc. when you start that engine check the pump cover to make sure it stays cool
  5. My Affair, May 22, 2018
    #5
    My Affair

    My Affair Member

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    How often do you replace your impellers? If your impeller broke up make sure to find all the pieces. Did your over temp alarms go off?
  6. ruby, Jun 10, 2018
    #6
    ruby

    ruby Member

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    Check your transmission coolers also, all kinds of things may be in there, I cleaned my transmission coolers every 2 years
  7. Capt Ralph, Jun 11, 2018
    #7
    Capt Ralph

    Capt Ralph Senior Member

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    Any update from the OP?