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Oil Bath Air-Cleaner to Paper Filter Conversion

Discussion in 'The Hokey Ass Message Board' started by rustyfords, Oct 28, 2011.

  1. I've been asked to share my method and photos for converting an Oil-Bath air cleaner to one that will accept a paper element.

    The air cleaner in these photos is from a 55 tudor Mainline that my dad recently sold.

    This is a VERY SIMPLE approach to this conversion and only takes a few minutes.

    Here it is:

    Step one:

    On the lid, cut away the housing that contains the mesh filter. Leave enough material (as shown in the photo) to create a seal on top of the paper element.

    It's important that you make this cut nice and straight.

    Attached Files:

    Last edited: Oct 28, 2011
  2. Step two:

    Drill relatively large holes in the base of the air cleaner as shown in the photos, to allow for air flow. If you need more air flow....drill more holes.

    Attached Files:

  3. Step Three:

    Drill holes in the bottom of the base to allow air to enter the housing....again....more holes = more air flow.

    Attached Files:

  4. Step Four:

    Take the base to the local parts house and test fit various paper elements until you find one that pretty much fits the diameter of the housing as well as the general height of the housing.

    Measurements for this element are shown for anyone who has a 55 Ford.

    Attached Files:

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  5. Step Five:

    You're all done. Set the lid on top of the paper element and as long as the cut you made on the lid is nice and straight, it will dig into the rubber of the element a little bit when you tighten it down and you'll have a good airtight seal.

    The air will flow in from the top a little bit, but most of it will travel into the housing of the unit and out of the holes on the inside.

    When you open the hood, it'll look stock unless someone really gets close to it.

    Attached Files:

  6. Note:

    This coversion is for someone wanting to keep the stock carb.

    The conversion I did on my 54 Ford oil bath (see my build thread) was different because I wanted to mount it to a 4 bbl carburetor.
  7. Cargo
    Joined: Jun 18, 2007
    Posts: 212


    I had to check this out when I saw the header in your other posts. Good ol' American ingenuity!
  8. Good creativity to keep the look with better filtering.
  9. dante81_98
    Joined: Sep 26, 2005
    Posts: 504

    1. A-D Truckers

    I did this for the air cleaner in my econoline. worked out great and kept that stock look and pretty much had the same exact steps you had here. Only caution that I would give is not to drill the holes until you know exactly where the filter is going to sit.
  10. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 7,865

    Rusty O'Toole

    I'd rather have the oil bath.
    meezy likes this.
  11. 40FordGuy
    Joined: Mar 24, 2008
    Posts: 2,908



  12. fordvic54
    Joined: Nov 9, 2010
    Posts: 3


    I'm concerned, my air cleaner for the 239 O/H valve V8 has 3 holes that come in the bore of the center tube of the bottom section. I can't tell by the pictures if this one has them for the 6 cyl. but I'm sure it does. The way I see it, this will allow the air flow to bypass the paper filter, correct? Maybe I'm missing something here.
  13. I don't remember there being any holes that would bypass the filter on this conversion.

    If there were though, the quick answer would be to simply block them off. There'd be several ways to do quickie that comes to mind would be to JB Weld some little metal patches over the holes. It's not going to be seen, so you wouldn't have to worry about it being perfect.
  14. jcmarz
    Joined: Jan 10, 2010
    Posts: 4,636

    from Chino, Ca

    There's a new thread on Oil Bath to Paper conversions titled "How to convert your 8BA oil bath air filter to paper/dry type" and posted by IowaMercMan. RustyFords method is simpler. So easy a Caveman can do it.

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