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Turbo flushing Detroit v92's

Discussion in 'Engines' started by Davidoc, Apr 20, 2019.

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  1. Davidoc, Apr 20, 2019
    #1
    Davidoc

    Davidoc Senior Member

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    Hi guys, anybody have experiance with flushing turbos and aftercoolers with a flushing product like the Yanmar Turbo Wash?
  2. Capt Ralph, Apr 20, 2019
    #2
    Capt Ralph

    Capt Ralph Senior Member

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    Before you start spraying snake oil into your engine, Are you really having turbo problems?

    Remember; Never kick a sleeping dawg..
  3. Beau, Apr 20, 2019
    #3
    Beau

    Beau Senior Member

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    Do you have airseps? Pull them off, shine a light inside and see if the turbo body is dirty. if you run your finger lightly across a blade and it comes back with a small amount of black, you're probably ok. If you keep the airseps clean - clean and reoil each year, and renew every 5 or 6 you should be pretty clean inside. Paper filters - no so much.
  4. Beau, Apr 20, 2019
    #4
    Beau

    Beau Senior Member

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    Also, how are your Engine Gas Temps. Those are excellent indicators of reduced efficiency. They should be a logged item so you can detect an upward tread quickly. They help keep an eye on the water side also since that's what cools the gases
  5. Davidoc, Apr 24, 2019
    #5
    Davidoc

    Davidoc Senior Member

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    I'm sorry guys,I posted a quick reply to both of you immediately and I don't see it posted. Thanks for your input. I'm not having any Turbo problems now. I did because I had a raw water pump leak sucking into the airsep. Had to tear the engine down and do everything, turbo, blower aftercooler Etc. I do do the maintenance you guys have suggested annually. I also recently installed boost pressure and exhaust temperature gauges up on the flybridge. I had a tough soot problem on the starboard engine. After all the work we did I ended up pitching the props down to 26 by 26.5 from 28. I didn't have enough metal on the props to reach wide open throttle, so I left it at 2250 for now. I read the Boatyard article in powerboat magazine about the Yanmar turbo wash product. Apparently it's part of their maintenance program. It seemed to me as though it may be very helpful using on the old Detroit's especially if it provided some cleansing action to the aftercooler which is very difficult to remove as you know. Just wondered if anybody out there has had any experience with the concept of feeding some "snake oil" into the turbo while running at Cruise?
  6. Davidoc, May 10, 2019
    #6
    Davidoc

    Davidoc Senior Member

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  7. Capt J, May 10, 2019
    #7
    Capt J

    Capt J Senior Member

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    I don't know if cleaning them in this manner would help or harm. Detroits do run dirty after periods of slow speeds and cleaning the aftercoolers or intercoolers should help with airflow. Detroit never had any mandate or instruction for cleaning the air side of them. But they probably do get dirty.
  8. Davidoc, May 10, 2019
    #8
    Davidoc

    Davidoc Senior Member

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    Thanks captain J, I guess we could monitor the boost at cruise speed and shoot a little wash mix in there and see if the boost goes up a little. The process does sound logical to me. I'm not ready to do it yet but I think I'll give it a shot if I see the boost is starting to deteriorate on one of the engines.
  9. PacBlue, May 11, 2019
    #9
    PacBlue

    PacBlue Senior Member

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    The link did not work. Pyrometers on DD’s will allow you to monitor their health, any changes will be noticeable.

    I would ditch your props and get new ones that will give you 50 rpms over the rated rpms. Not a fan of poor propeller performance, money spent here is well worth it as it works for you every revolution underway. Don’t make them work harder than necessary.
  10. Davidoc, May 11, 2019
    #10
    Davidoc

    Davidoc Senior Member

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    Thanks the forum would not let me post the link to power and motor yacht magazine for some reason. That is what is missing from the link I did post.

    Props were balanced and modified from 28's to 26.5's. We wanted to get to 26 but did not have enough metal. Will get a new set made up and carry these as my new spares.

    Exhaust temp is being monitored with permanent gauges on the flybridge.