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Curiosity is killing me-cannister style oil filter question

Discussion in 'Early CJ5 and CJ6 Tech' started by Taper, Jun 24, 2006.

  1. Jun 24, 2006
    Taper

    Taper New Member

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    Mar 23, 2006
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    33
    On a F-Head cannister style (drop in-not spin on) oil filter, how exactly is the oil filtered? It appears to me that the side mounted hose is the supply, and the bottom mounted hose is the return which goes to the fitting on the timing cover. Since the cannister filter has o-rings on both ends that slip over the long tube in the center of the housing, how can oil move thru that? My observatiob is that the supply oil is hitting the side of the filter element rather than flowing thru it. (unless all the tiny holes on the side of the element somehow catch the oil) Am I wrong on my thinking? I cant even see any way for the oil the get filtered.....just splashes off the side of the element, drops to the bottom and out the return hose. I have got to be missing something.
    I suspect that the spin on type would prove to be much more effective. Someone please set me straight here....

    Mike in KC
     
    Taper, Jun 24, 2006
    #1
  2. Jun 24, 2006
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    The tube got holes in it to let the filtered oil in, the tube is sealed to the port in the bottom to let the oil out.

    H.
     
    Howard Eisenhauer, Jun 24, 2006
    #2
  3. Jun 24, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    It's a side stream setup so only some of the oil gets filtered. If you'll notice on the tube the hole is about the same height as the inlet so when not running it always retains oil.
     
    Glenn, Jun 24, 2006
    #3
  4. Jun 25, 2006
    Taper

    Taper New Member

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    Mar 23, 2006
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    I'm wondering then if I got the correct filter element. It is approximately the same height as the cannister itself. It looks like a basket. It has a hole at the top and hole at the bottom , same diameter as the center metal tube in the cannister, both of which has a rubber seal, sealing itself tight to the metal tube in the center of the cannister. There are no holes on the metal tube in the center. There are a series of small holes going all around the element, and thats it. So it looks to me like the oil has to force it's way thru the small holes then drip to the bottom. This cant be very effective. Which brings me to the original question running thru my mind. To change it to the spin on type or leave it be.
    Any other thoughts out there??
     
    Taper, Jun 25, 2006
    #4
  5. Jun 25, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
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    There has to be a hole in the tube. I think there are 2, directly across from one another. They are small so you might not notice them, maybe between 1/16 and 1/8 inch. You're filter sounds right, what brand and number did you get? I think you'll find that if you pour oil in the empty canister it won't run out the bottom like you think it will. The holes might be plugged with junk too. Where did you get the canister? Weren't you originally looking for one? Edit. What I meant by running out the bottom is it won't drain out through the hose like you think it will. It has to drain through the tube to go through the hose.
     
    Glenn, Jun 25, 2006
    #5
  6. Jun 25, 2006
    Taper

    Taper New Member

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    Glenn......thank you very much. My curiosity has been satisfied. You are absolutely correct. There is a small hole about 2/3 the way up on the center tube. I never noticed it. I guess I was thinking of the oil being filtered from the inside of the element out. In this case, it looks like the oil fills up the cannister till it reaches the level of the hole, then only filtered oil is allowed to run thru it and down to the return. So then, it stands to reason that a lot of the unfiltered oil would settle down in the bottom of the cannister requiring periodic cleaning.
    I got my cannister and brackets from The Jeep Doc.
    The element is a Napa 1010
    Thanks so much for taking the time to help put this to rest. It was bugging me.

    Mike in KC
     
    Taper, Jun 25, 2006
    #6
  7. Jun 25, 2006
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
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    12,389
    Get one of those little suction pumps that fit on oil bottles for getting the oil out of the housing, then wipe it out with a rag and you shouldn't have a problem with any sediment in the bottom, or at least any worth worrying about. Glad we're able to help you out. :hurrican:
     
    Glenn, Jun 25, 2006
    #7
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