Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › 6bta oil leak by alternators

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  • January 17, 2019 at 11:17 am #54258

    Rick Pederson
    Participant
    Vessel Name: Trident True
    Engines: 6BTA 5.9 370
    Location: Everett, Wa
    Country: USA

    I have this same wetting on both of my engines and cannot locate the source. Has anyone seen this? I can’t seem to make my pictures small enough to post.

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  • January 22, 2019 at 10:47 am #54973

    Brad Fausett
    Participant
    Engines: 6bta 5.9 370hp
    Location: Cleveland, Ohio

    Check to make sure it is oil, it may be belt dust. I have noticed on ours we get a good bit of black in the area that is from the belt.

    January 18, 2019 at 3:03 pm #54512

    28Cuttyhunk
    Participant
    Engines: 6BT-220 QSB-5.9
    Location: Massachusetts

    Are you sure it’s Oil? After 10-12 years it is fairly common for the thermostat housing seal to start to weep, looks like oil when mixed with belt dust.

    January 18, 2019 at 9:42 am #54370

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

    Good picture(s) of what you see are ???

    Tony

    January 17, 2019 at 2:01 pm #54296

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

    Slight weep (sweat) of rocker cover gasket making it’s way down? Have you cleaned it all up and monitored it as to coming back?

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