Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › valve adjustment procedure 450 diamonds

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  • September 26, 2019 at 10:05 am #78495

    toolman
    Participant
    Vessel Name: Madijo
    Engines: 450 diamonds
    Location: westport wa
    Country: us

    a basic step by step valve adjustment procedure, 1700 hrs never been adjusted, run great, one engine a little lopie at idle.

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  • September 27, 2019 at 2:54 pm #78546

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

    This stuff is all over u-tube.. “12-valve Cummins valve adjustment”.

    The B & C procedure is the same–different clearances though–It’s on your engine tag..

    Use a 15/16″ socket and 1/2″ drive ratchet on the alternator nut (CW)–way easy to bar the engine over this way

    Tony

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