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Gearhead question

Discussion in 'Technical Discussion' started by NEO56, Nov 16, 2014.

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  1. NEO56

    NEO56 Member

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    This photo is pair of 2,400 hp MTU,s aboard a 64' Viking. My question is what are the tubes on top of the powerplants? They can't be Walker Airseps, They look like Tuna tubes, if they are it's a weird way to cook tuna! Seriously I've never seen anything like that. Please advise. large_877656.jpg
  2. Ken Bracewell

    Ken Bracewell Senior Member

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    Those are the air filters
  3. NEO56

    NEO56 Member

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    Really? With hard casings? Doesn't make sense to me, wouldn't that restrict the Air flow into the filter, and reduce efficiency? I'm confused.
  4. Capt J

    Capt J Senior Member

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    It could just be a white foam sleeve over airsep type filters, like a pre-filter. The aquafina water bottle for the coolant overflow is a nice touch on the port motor however.
  5. RER

    RER Senior Member

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    ...no doubt. Maybe this angle helps. Yeah the Aquafina bottle is a nice touch, lol. View attachment 68317

    Attached Files:

  6. NEO56

    NEO56 Member

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  7. NEO56

    NEO56 Member

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    And don't tell me that they are Nike neck gators to keep the filters warm! Seriously, you guys have been in way more engine rooms than I have...have you ever seen this before?
  8. jspiezio

    jspiezio Member

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    The photos do not show solid plastic covers over the air intakes. The solid appearance is a result of perspective.
    The filtering material is kept in place via a mesh over lay. The mesh has large diamond shaped "holes" that have a minimal impact on airflow, and when viewed from the side they may appear solid. When you change your perspective and look squarely at the covers you see the actual configuration clearly. I think that is what RER was trying to illustrate for you with the photo he attached. I hope this helps clarify what you are actually seeing.
  9. Capt J

    Capt J Senior Member

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    Yes, they are standard paper filters that you see on a lot of engines (non washable) and it's basically a metal cage that keeps the filter pleats protected and gives the entire filter strength so the paper doesn't crush from the housing that keeps it on the engine.
  10. Ken Bracewell

    Ken Bracewell Senior Member

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    I can't comment on the why's, but they are surely air filters. And we don't suffer any restrictions on ours.
  11. Old Phart

    Old Phart Senior Member

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    I dunno
    Last edited: Nov 17, 2014
  12. Capt Ralph

    Capt Ralph Senior Member

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    I would be asking why the engine height / alignment bolts have a lot of use on them.
  13. Old Phart

    Old Phart Senior Member

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    I dunno
    Good eyes.

    Must have used the last of the white paint on those single, white hose clamps? o_O

    Regarding the OP:
    Check out the filters being used.

    http://www.palmbeachpower.com/

    P.s._ Does seem to state "Walker Air/Sep Systems", lower right section.
    Last edited: Nov 17, 2014
  14. NEO56

    NEO56 Member

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    Thanks OP, I didn't know that donaldson made air filters, it was my assumption that Walker had the corner on the market for Marine air filtration...some of their filters could be construed as a solid cover. Thanks.
  15. NEO56

    NEO56 Member

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    Hey rcrapps, that was going to be my next question...I noticed that the nuts on the engine mounts were lacking the pretty white paint! Have they been constantly tighten down or up for adjustment? What would that indicate? Misalignment of the shaft? Possibly a bent shaft, I'm clueless. But something is causing the use of a wrench to be used on those nuts. This is definitely something I'd like some feed back on. Good eye...I saw that as well, but the white tubes had me confused.
  16. NEO56

    NEO56 Member

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    Thanks OP, I didn't catch the single hose clamps...that can't be right? Who would do such a thing? I called my Viking "guy" today to inquire about the hours on the motors, 2,000 hours. I was told that depending on their service, they could blow up in 200 hours, or go another 5,000 hours without major overhaul, depending on how they were run, and kept up. Typical broker speak. He also mentioned that 8-10 thousand hours was the run out. And while I'm typing, how much are a new set of MTU 16V M93's cost? (M93=2,400 hp)
    This is kind of like buying a jet....most people dump them prior to having to even do a "hot"section on the engines, lest a major overhaul. Strangely enough, it's based on "cycles" not hours. ( A cycle is start up to shut down) doesn't matter if it's 30 minutes or 2 hours. Weird huh?
  17. Marmot

    Marmot Senior Member

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    No, it is not weird.

    There is a lot of weird stuff in this thread that begs a lot of questions we are not allowed to ask but maintenance based on thermal cycles is the least "weird" thing so far.
  18. Marmot

    Marmot Senior Member

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    The guy working on the assembly line at MTU did "such a thing" when he installed the crankcase breather ...

    The implication that this might be an unacceptable practice is my idea of "weird."
  19. K1W1

    K1W1 Senior Member

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    The hose clips might have once been on a hose that was painted white and has been replaced, single hose clips are find when no pressure as such is present.

    If the colour and quantity of the hose clips causes you consternation I would have a long hard look at something else on those engines that will be much more attention grabbing than a hose clip.
  20. captholli

    captholli Senior Member

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    I would start at the two 2/0 red positive DC cables going to that Breaker chafing on the plate cooler Starb. Motor and then at the other cabling with out chafe gear on the girders by the starters . I've resisted joining this thread due to the first question posted about the air cleaner "can you identify this" ???
    " Tuna Tubes" ?? The OP has stated that he has owned vessels in the past and to my best recollection I just don't remember any engine that didn't have silencers or intake filters but maybe this poster enjoys the attention of a
    Neophytes question. Just saying...
    Last edited: Nov 18, 2014