Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Air in cooling water Cummins 6BT Marine

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  • February 17, 2022 at 7:20 am #127032

    Ole Storbukt
    Participant
    Vessel Name: Cleopatra
    Engines: Cummins 6BT 210hp
    Location: Kristiansund
    Country: Norway

    My Cummins 6BT 5,9 210hp creates air an overflow of cooling water system if RPM is above 1900.

    Any proposal what the reason is?

    Below 1900RPM no air is seen and engine have 450hours since total overhaul.

    The water-cooled exhaust manifold is renewed but still the problem occurs

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  • February 18, 2022 at 5:58 am #127090

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Post pictures of the compete engine showing all–no close-ups

    February 17, 2022 at 11:33 pm #127075

    Ole Storbukt
    Participant
    Vessel Name: Cleopatra
    Engines: Cummins 6BT 210hp
    Location: Kristiansund
    Country: Norway

    I occurred some 400h after overhaul, and the reason for overhaul was just to have everything in good order.

    I suspect the china cooling water pump, because I have tested the atmosphere in the header tank with test kit and there was no sign of exhaust gases.

     

    February 17, 2022 at 9:38 am #127036

    Rob Schepis
    Forum Moderator
    Vessel Name: Tenacious
    Engines: 6BTA 5.9 330's - "Seaboard Style"
    Location: Long Island, NY
    Country: USA

    I’m not following you as to an “overflow of cooling water”

    Do you mean engine coolant?

    And has this been happening ever since the overhaul 450 hours ago?

    What was the total overhaul and why was it needed?

     

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