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Gas Tank Questions

Discussion in 'Early CJ5 and CJ6 Tech' started by Johns1967CJ5, Aug 17, 2017.

  1. Aug 18, 2017
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    Yes. 3/8" flared tubing with nut bent 90* screwed into the fitting about 3" long then rubber hose to the filter.
     
  2. Aug 18, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    I would worry about some unexpected siphon action if the return were plumbed to the bottom of the tank. The return normally goes in the top and dumps above the gas level. My inclination would be to duplicate that configuration somehow. I am quite proficient with soldering, and I would prefer to go that route. Epoxy, weld or braze might be some other options.
     
  3. Aug 18, 2017
    Oldriginal86

    Oldriginal86 Member

    Pasadena, Md.
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    I agree with timgr, no tube extending into the tank. Just let the return fuel splash on top of fuel in the tank.
     
  4. Aug 18, 2017
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    Ok, leaning towards putting it into the sending unit.
     
  5. Aug 18, 2017
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    This is the plastic gas line. Not sure if it's factory. Anyone else see this on theirs

    [​IMG]
     
  6. Aug 18, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Nylon. Seen that on later years, not sure if it was present in 1967. In 1973, it was used for vapor return, not liquid.

    Ford use that for EFI, but you need a special tool to install the high-pressure ends.
     
  7. Aug 18, 2017
    colojeepguy

    colojeepguy Colorado Springs

    At the foot of...
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    The nylon tubing is factory equipment for supply and return lines on the V6.
     
  8. Aug 19, 2017
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    I assume they just connected to the rubber hoses with a clamp ?
     
  9. Aug 19, 2017
    Alan F

    Alan F Sponsor

    SE TX
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    That's what I did. You can get weldable bungs from McMaster Carr.
     
  10. Aug 19, 2017
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    Did you actually weld it or solder. I only have a mig welder
     
  11. Aug 19, 2017
    Phil P

    Phil P Member

    Ottawa Canada
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    Aug 21, 2010
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    My 4.3 tbi has both feed and return on bottom, it seems to run well but I never let it get to low.
     
  12. Aug 19, 2017
    Alan F

    Alan F Sponsor

    SE TX
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    IMG_1045.JPG
    Welded.
     
  13. Aug 19, 2017
    Johns1967CJ5

    Johns1967CJ5 Sponsor

    Northern NJ
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    Somehow I don't think my welding would look that good on such thin sheet metal. More blow thru than anything. What do you all think about a bulkhead fitting ?

    [​IMG]
     
  14. Aug 19, 2017
    Alan F

    Alan F Sponsor

    SE TX
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    For a top-mounted return line, it should work fine. The repro tank I bought had the wrong size bung on the bottom for the fuel outlet. I had bought an assortment of weldable bungs and already replaced the one in the bottom. Otherwise I would have used one of those if that's where I had started.
     
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