Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › 2000 6CTA Aftercooler Service

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  • January 21, 2021 at 3:50 pm #109306

    stevenagodfrey
    Participant

    Hello –

    Performed my first aftercooler maintenance today – the aftercooler was purchased from Seaboard two years ago and the boat has been mostly in fresh water.

    I noticed water on the air side in the pipe coming from the turbo and upon disassembly I found the fins wet. As noted on the site the turbo side was black. Is this normal condensation from the hot turbo air or do I need to investigate the source of the water.

    I have sbmar boost and egt gauges installed and the last time I ran the boat at WOT 2960 RPM EGT 800 Boost about 28 #.

    Pictures of the Core attached.

    Thanks for help in advance.

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  • January 22, 2021 at 5:52 pm #109354

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

    Because of what they “looked like”.. I’ve seen New aftercoolers look worse because they were assembled DRY at the factory..

    January 22, 2021 at 10:03 am #109340

    Keith Giller
    Participant
    Vessel Name: Riv. 43
    Engines: Cummins 450 Diamond
    Country: United States

    AC Service

    Tony, are saying his AC’s could have gone two more years because of the freshwater environment? I ask because I was going to take mine to you guys for a two year service. I’m in saltwater. Thanks and let me know.

    January 21, 2021 at 7:33 pm #109313

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

    Two things:

    1) Your aftercooler could have gone 2 more years before servicing

    2) Read this: https://www.sbmar.com/articles/aftercooler-condensation-a-different-way-to-look-at-air/

    1 user thanked author for this post.
    stevenagodfrey
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