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D284xLE4xx Repair Manual

Discussion in 'Engines' started by butch w, Apr 9, 2024.

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  1. butch w, Apr 9, 2024
    #1
    butch w

    butch w Member

    Joined:
    Sep 27, 2022
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    Location:
    Arnold MD
    Any one know if the
    CRANKCASE BREATHER OIL SEPARATOR
    is a serviceable item, meaning is there a way to clean them or do you just leave them alone etc. Or if they need to be cleaned/serviced what is the preferred method, thanks

    I have D2848 LE403's. I believe the it is the same part for many of the mechanical engines in the 284....style

    Thanks for any input
  2. Capt Ralph, Apr 9, 2024
    #2
    Capt Ralph

    Capt Ralph Senior Member

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    I remember this. Well, bits and pieces.
    Some slow brain cells on this were dissolved a few years ago (lack of use).

    Case vent and the case gases went before the turbo. Just a trap consolidating the oil to drain back into the block.
    Don't remember anything in the manual.
    I recall tearing into a high hour 900CRM. Clean as a bell. Never touched another.

    Our brother mapism Is a great source and hopefully he can chime in.
  3. mapism, Apr 11, 2024
    #3
    mapism

    mapism Senior Member

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    I'd go for the latter.
    Unless there's any specific problem you need to solve, but FWIW I never heard of any related to that component.
    Capt Ralph likes this.
  4. ranger58sb, Apr 14, 2024
    #4
    ranger58sb

    ranger58sb Senior member

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    Chesapeake Bay, USA

    I'm a little hazy on details and don't have the info on board with us just now...

    But I'm pretty sure it was the crankcase breathers that we replaced on our 423s -- to a newer version -- since we were seeing some slight oil burp out the dipsticks, and our MAN guy suggested the older style was the cause.

    Might not be relevant to the 403s.

    -Chris
  5. butch w, Apr 14, 2024
    #5
    butch w

    butch w Member

    Joined:
    Sep 27, 2022
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    Location:
    Arnold MD
    Thank you all for the input, I have had them sitting on the bench for a week and no oil has ran out of them and air flows through them just fine. So I assume all is well with them and they are working as they should.

    I didn't know if they required a cleaning similar in fashion to say a K&N style filter.