Cummins Marine Diesel Repower Specialists › Forums › General Discussion › Holy plugged aftercooler!!

  • This topic has 7 replies, 4 voices, and was last updated 4 years ago by john.
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  • September 26, 2019 at 7:43 pm #78512

    john
    Participant

    This is a seriously plugged aftercooler. Said it was serviced three years ago. I’m questioning that. New one coming from seaboard to say the least. Service them sooner than later!!

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Viewing 7 replies - 1 through 7 (of 7 total)
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  • October 7, 2019 at 7:24 am #78955

    john
    Participant

    Well I replaced the aftercooler and the boat ran great. I think it’s overpropped but that’s another problem. Looking at everything it was a core failure to me. It came out though it may have been five years since the service on it. Now for a new raw water pump. I’m going to have seaboard t shirts for every day of the week the way things are going

    September 30, 2019 at 6:15 pm #78667

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

    Yes, they can show evidence of salt if the aftercooler is leaking. I’d like to see the one’s from this engine if possible.

    September 30, 2019 at 3:43 pm #78663

    Mike Schmidt
    Participant
    Engines: Cummins 6bta 330hp
    Rob Schepis wrote:

    Serviced three years ago and someone forgot the o-rings!

    Are you going to investigate the engine as to saltwater ingestion?

    Have you took a look at the grid heaters – let’s hope that they look anything like that core….

    Is the condition of grid heaters a good indication of whether or not an aftercooler is leaking? Seems like a good quick/simple diagnostic checkup item to add to the PM schedule.

    September 30, 2019 at 7:00 am #78637

    john
    Participant

    You want a pic of the core? I am waiting for the aftercooler from you to see how it runs. It cold started fine but did have a lot of white smoke. It idled fine but got choked out at 1200 rpm.

    September 27, 2019 at 3:01 pm #78548

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

    I’d love that pic in High Res, clear & in-focus..

    How does the engine start when cold and has not been run for a few days?

    Oil consumption?

    Tony

    September 27, 2019 at 8:42 am #78533

    john
    Participant

    There are issues as well but this is my first step. I suspect he will need a valve job as well. The o rings were there. He did the service himself. I will get it running again and go from there. It did idle fine but since there was no air it choked it off at 1200 rpm. Not a lot of hours on the engine in the last three years,

    September 27, 2019 at 5:08 am #78525

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

    Serviced three years ago and someone forgot the o-rings!
    Are you going to investigate the engine as to saltwater ingestion?
    Have you took a look at the grid heaters – let’s hope that they look anything like that core….

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