Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Small oil seep/drip

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  • November 7, 2017 at 8:19 pm #24855

    Philip
    Participant
    Vessel Name: 2007 35’ Cabo ‘FUGA’
    Engines: Cummins QSC8.3-540’s
    Location: Long Beach, CA

    I have a small oil leak/drip from a plug at the bottom of my QSC8.3-540 oil cooler. Just a couple dozen drops over a 10 hour period but annoying.

    Can I just remove the plug and reinstall with some rector seal or is there springs etc behind the plug?

    How much oil behind the plug?

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  • November 8, 2017 at 7:40 pm #24910

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

    You posted a good picture………………..Follow Rob’s advice..

    Remove the plug, clean all, use Rectorseal #5 (needs to be in your tool box) as a sealant and re-install..

    Maybe, you could just try tightening it 1st?

    Tony

    November 8, 2017 at 6:35 am #24860

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

    Philip,

    I don’t have your serial number but I pulled a QSC oil cooler parts diagram (see attached). Nothing more than a straight forward 1/2″ pipe plug, and yes on the RS pipe dope

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