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need filter help

Discussion in 'Early CJ5 and CJ6 Tech' started by 1966cj5V6, Mar 15, 2005.

  1. Mar 15, 2005
    1966cj5V6

    1966cj5V6 New Member

    San Diego, CA
    Joined:
    Oct 3, 2002
    Messages:
    33
    Hello all!!! I am trying to figure out who carries the filter that goes at the inlet to the rochester 2g carb where the fuel line feeds into it. I pulled the filter out and noticed it is made from copper?? or whatever it is, but the only ones Napa had were paper type fillaments, I took them both since I was there and when I got home removed my filter and tried to see if they paper typeones would fit....doesn't look like it will.

    Does anyone out there know where I can come across an original type one like I have?? I know some of you guys probably ditched it a long time ago and put a see-thru in-line type filter in but I'd like to stay stock seeing as the old CJ5 is almost totally factory original type stock except a few improvements and performance parts. ANY halp would be much appreciated.

    Brian
     
  2. Mar 15, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    The sintered brass filter?

    The general advice around here is get rid of it and put an inline in.

    It doesn't do much and if it clogs you can't see it like a see through inline filter.

    Search if you don't believe me. ;)
     
  3. Mar 15, 2005
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
    Joined:
    Aug 12, 2003
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    1,036
    I just picked up two of them at Carquest - they had about 20 on the shelf. Guys here have often recommended just taking it out which I did not understand but now I think they meant to say replace it with a see thru inline (which I also have). Possibly this was the only fuel filter from the factory? It never occured to me that there wasn't a regular inline from The Beginning.
    Anyway, I run both for now.
     
  4. Mar 16, 2005
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,526
    the GM/Delco # used to be: 7013404
     
  5. Mar 16, 2005
    Bob

    Bob Member

    Northern California
    Joined:
    Sep 23, 2002
    Messages:
    441
    Picked up one the other day. It was an AC GF455. It had Jim's long number on the bag too.
     
  6. Mar 16, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
    Messages:
    747
    Best place for that filter is in the round receptical. Notorious for cloging. Made a fortune off them when I worked as a mechanic in college. The later ones used a paper element in there.

    Chuck it and put a good inline filter in.

    Yes, it was the only filter in GM type installations.
     
  7. Mar 16, 2005
    1966cj5V6

    1966cj5V6 New Member

    San Diego, CA
    Joined:
    Oct 3, 2002
    Messages:
    33
    thanks a ton for the info guys. I'm still considering ditching the sintrered brass for an inline see-thru filter. Anyhow great info to have.........

    Brian
     
  8. Mar 16, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Remember, when you have a good inline filter, there is absolutely no need for the little brass one.
     
  9. Mar 16, 2005
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    Werd, Jim! Antoher major mistake that a lot of folks make is to put an inline filter between the tank and the pump, thinking that by doing this they will keep the sediment and crap outta the fuel pump as well. The problem is, that a fuel pump is much more efficient at PUMPING fuel than it is at SUCKING fuel. Therefore, the filter in front of thepump poses a major restriction in the system. (Think about sucking a milkshake through a straw versus blowing it out the other end!)

    Mechanical fuel pumps are very resilient, and rarely fail due to debris. Make sure that you have a good, quality inline filter between the fuel pump and the carb and you are good to go. IMHO, the nice chrome aftermarket filters with the 'cleanable' screens aren't worth the powder it would take to blow them to he**. Go for a nice, name-brand inline filter from Fram or Purolator and put it right in front of the carb inlet and fergetaboutit!
     
  10. Mar 16, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
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    747
    Steve: I've never put one between the tank and pump. If your tank is THAT dirty, clean it out. On mine I put a Carquest (Wix) between the pump and carb. Change every year or so. There cheap, and much better than the so called "cleanable" ones.
     
  11. Mar 17, 2005
    maxx

    maxx Banned

    Menlo Park, Ca
    Joined:
    Apr 22, 2003
    Messages:
    171
    Some days I feel like I am going "against the grain" of early cj5 owners, :rofl: that I naturally like because of their choice of vehicular recreation/ownership. :) My thoughts about removing the sintered brass carb filter is that you will increase the fuel pressure on the needle and seat.
    If you have a good filter inline, like the original, you will have no problems. You just replace it at a reasonable interval. And yes, in the original form they are still made, of course they are now incased in plastic, but have all the necessary inlets and outlets.
    The clear glass, aftermarket ones are nice, but my experience with them is that the cheap pot metal they cast them with, corrodes and with vibration, the threaded portion lets go and you get a fuel leak after a few years. :shock:
    Especially if you unthread them for a new filter or a cleaning.
    Discarding the sintered brass filter increases fuel pressure, and slams the needle into the seat when the float tops off, and makes numerous jeepers rebuild their carb after it floods and dies, when they are trying to finesse a tricky trail.
    I dont intend to be contrary here, after all "your jeep, is your jeep." (tm) :D
    Its simply a matter of 3 lbs of fuel pressure vs 8 lbs or more with a high flow/low restriction street racer filter.
    Couple that with an electric fuel pump that delivers 5 gal per minute and we are talking about 10 psi or more. :shock: It blows the gaskets out of the bowl or bleeds off fuel wherever it can if the needle and seat dosent hold.
    If you toss it, make sure you plumb in a pressure regulator into the fuel line.
    Just my 2 cents. :flag:
     
  12. Mar 17, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Maxx: Yea, you're just "contrary". :p Remember, your pressure will be the same if you push it thru a 1 micron filter or an open 3/8" fuel line. It's the "flow" that will be restricted, not the pressure.

    What you're saying may be true with aftermarket electirc fuel pumps and such, but not with stock. The stock :v6: fuel pump has 2.5 lbs pressure with the ruturn line open and about 3 lbs with it "pinched" off. In other words, nothing excessive. And you still wil be pushing it thru an inline paper filter, so I see no problem with it. And, the only reason GM put it there was that it was absolutely the easiest and cheapest place to put one during assembly.
     
  13. Mar 17, 2005
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
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    Guys, this is a good (helpful) discussion and what makes this site so great. A good discussion gets the brain cells working.

    I think you're both right. James has experience with this and has had good results but maxx you are right that there is a pressure drop through the brass filter. Pressure drop being relative to area I'm pretty sure there's a lot more pressure drop through the brass filter than through the typical see thru in line filter.
     
  14. Mar 17, 2005
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
    Joined:
    Feb 2, 2003
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    A clean bronze filter that is in the carb has very little resistance to it. It should not affect the 2.5-3 lb pressure at all.
     
  15. Mar 17, 2005
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
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    what JPE just said
    x2
     
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