oil residue in aircleaner?

General Mopar Tech Discussions

  1. davek

    davek FBBO Gold Member FBBO Gold Member

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    Ive noticed a very light oil residue on the lower part of the air cleaner,Also my friend said the same on his. What causes this to happen? Thanks Dave
     
  2. turbine68rt

    turbine68rt FBBO Gold Member FBBO Gold Member

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    I had that same thing with my 440 before the rebuild. I had pretty much blowby. Now there's zero oil out of the breather or on the air cleaner base since break-in. Just hit the 1000 mile mark, no leaks, smoke, or oil loss.
     
  3. Lionized

    Lionized Well-Known Member

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    That means your PCV system is working.
     
  4. vance.dykes

    vance.dykes Well-Known Member

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    yes your breather system is working. the breather may be soaked in oil remove and clean and let dry then see how much comes back.back in the day when the oil change was done we would wipe the air cleaner out and wash the breather. you could replace it with a baffled one or one with filter element in side to decrease the amount that gets in the air cleaner.
     
    • Agree Agree x 1
    • dadsbee

      dadsbee FBBO Gold Member FBBO Gold Member

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      Does your valve cover have a baffle below the PCV valve?
       
    • davek

      davek FBBO Gold Member FBBO Gold Member

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      Yes,its not a bunch of oil just some light residue.
       
    • turbine68rt

      turbine68rt FBBO Gold Member FBBO Gold Member

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      Is it something recent or has it been like that for a while
       
    • davek

      davek FBBO Gold Member FBBO Gold Member

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      I never noticed until I put the 6 pack setup on,about 4 months ago
       
    • Ernie ingling

      Ernie ingling Well-Known Member

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      Check oil for fuel contamination diluting oil resulting in blow by
       
    • turbine68rt

      turbine68rt FBBO Gold Member FBBO Gold Member

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      Blowby is the leakage of the air/fuel mix past the rings into the crankcase, usually from worn or broken rings. Either way, from an insufficient ring/wall seal.
       
    • Ernie ingling

      Ernie ingling Well-Known Member

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      Gas diluted oil will easily get past rings
       
    • turbine68rt

      turbine68rt FBBO Gold Member FBBO Gold Member

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      Those two work in conjunction to accelerate the wear. Leaking rings permits unburned fuel to enter the crankcase, diluting the oil. A viscious cycle.
       
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