Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Coolant hose trouble

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  • April 18, 2018 at 10:42 am #31216

    Ron Pickering
    Participant
    Vessel Name: Anykine
    Engines: 6BTA 370
    Location: Waianae HAwaii
    Country: United States

    I ordered some new hoses from Seaboard to change out old ones while I was performing maintenance on the aftercooler and heat exchanger. All the hoses are good except I am having trouble getting the 0.75″ expansion tank coolant hose (item #10 from website) on the lower fitting. It fits the top fitting fine. I’v tried dishsoap and also heating the hose with hot water but cannot get it more than maybe a 1/4″ on.

    Are there any tips or tricks to try?

    Engine is a 6BTA 370 hp.

    Thanks

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  • April 19, 2018 at 10:10 am #31240

    Ron Pickering
    Participant
    Vessel Name: Anykine
    Engines: 6BTA 370
    Location: Waianae HAwaii
    Country: United States

    Rob,

    That’s the right one. I finally got it with a heat gun. I called Seaboard and Brandon said that is a 7/8″ fitting from the factory.

    Ron

    April 18, 2018 at 1:57 pm #31229

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

    This hose/fitting?
    Can you share some pics of what you are dealing with? Any chance someone changed out that lower fitting from the stock one? Heat and lube, as you have already tried, is the usual ticket..

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