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Steel Fuel Line From Carburetor?

Discussion in 'Early CJ5 and CJ6 Tech' started by Buildflycrash, Dec 29, 2019.

  1. Dec 29, 2019
    Buildflycrash

    Buildflycrash Member 2020 Sponsor

    Gulf Breeze FL...
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    Swapping out the carb on my V6 back to a Rochester. The fitting I have on the inlet is keeping the air cleaner from sitting down correctly. Seems like a steel line I could bend down quickly and have the clearance needed.

    Question is: Is the flair on a large steel brake line correct (or adequate) for the connection? The threads match up and it seems very secure but I’m guessing that this is not a place for a leak!

    Thanks Scott B
     
  2. Dec 29, 2019
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    If it's a flare nut fitting, it's the same as a brake line flare.
     
  3. Dec 29, 2019
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2020 Sponsor 2019 Sponsor

    cordele, Ga.
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    If you have the oil bath air cleaner there is a raised portion in the bottom of the cleaner housing that allows clearance over the fuel inlet of the carb.
     
  4. Dec 30, 2019
    Rick Whitson

    Rick Whitson Detroit Area 2020 Sponsor 2019 Sponsor

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    I use brake lines to plumb my fuel system on my Jeep, they work on low pressure systems, like fuel lines, and you don't have to double flare the end you cut. You can take the top off your fuel pump and rotate it 180* and the intake will be on the rear of the fuel pump and the outlet will be on the front, that makes it a lot easier to plumb the gas line to the Carb. Good Luck.
     
  5. Dec 30, 2019
    Keys5a

    Keys5a Sponsor

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    Some of the fuel fittings have what is called an inverted flare. If you find that your carb fitting doesn't mate correctly with a brake line fitting, this may be the reason.
    -Donny
     
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  6. Dec 31, 2019
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

    Hills of NH
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    I thought brake fittings are inverted flare.
     
  7. Dec 31, 2019
    Rick Whitson

    Rick Whitson Detroit Area 2020 Sponsor 2019 Sponsor

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    Not any more Pete, they have a "Bubble" in fittings now too, mostly on newer stuff.
     
  8. Dec 31, 2019
    maurywhurt

    maurywhurt Member 2020 Sponsor 2019 Sponsor

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    I just re-plumbed the fuel feed to the 2G Rochester on my Dauntless using a new 5/16 stainless steel line with a 45-degree flare. The 45-degree flare matches the one on the original steel fuel line, the remaining end of which was still intact and on the carb. The original steel line had been cut at some point and connected to the fuel filter with a rubber line.

    [​IMG]

    [​IMG]


    Rather than trying to flare the (very hard) stainless, I bought one of these and cut one end off, then used a tube bender to form it:

    5/16" Fuel Line 30 INCH STAINLESS STEEL 1/2-20 Tube Nuts 45 Degree Double Flare | eBay


    The general shape of the new line was based on these photos showing an original 1966 fuel line. This engine has a different coil placement than mine does, so I adapted the shape of the line I made for my motor to travel under and behind the coil.

    [​IMG]

    [​IMG]
     
    Last edited: Dec 31, 2019
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  9. Dec 31, 2019
    Buildflycrash

    Buildflycrash Member 2020 Sponsor

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    Your carb looks just like mine. Except I have the large paper filter type air cleaner. I failed with the brake line the first time now because my bender would not make the bend soon enough from the end of the line. I’m going to find a different bender and try again. Ordered a aftermarket cleaner from Summit for now.
     
  10. Dec 31, 2019
    maurywhurt

    maurywhurt Member 2020 Sponsor 2019 Sponsor

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  11. Dec 31, 2019
    PeteL

    PeteL Member 2020 Sponsor 2019 Sponsor

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    I know that in theory, but I've never owned a vehicle with bubbled lines.

    The jeep the OP has surely uses 'old fashioned' 45º inverted flares on both brake lines and fuel lines. They should be identical in my experience.
     
    Glenn likes this.
  12. Dec 31, 2019
    Twin2

    Twin2 not him 2020 Sponsor 2019 Sponsor

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    do you have the spacer for the dry air cleaner
    DSCN0325 - Copy.JPG
    and I always thought it was for choke cable to clear
    DSCN0326 - Copy.JPG
     
  13. Dec 31, 2019
    Buildflycrash

    Buildflycrash Member 2020 Sponsor

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    NO.
    How big is that spacer? Got an extra?
     
  14. Dec 31, 2019
    Twin2

    Twin2 not him 2020 Sponsor 2019 Sponsor

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    no I don't
    suggest you put a ad in classified section . someone might have one
     
  15. Dec 31, 2019
    Buildflycrash

    Buildflycrash Member 2020 Sponsor

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    I'll do that if I cant get the clearance I need with the proper fuel line bend.....and I haven't even tried to get the choke connected yet!
     
  16. Jan 1, 2020
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2020 Sponsor

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    focker or someone was trying to 3D print that spacer...not sure if it held up to the fuel and vapor. There is a spec sheet for that spacer somewhere....
    Try here....homersdog has some dimensions and wyomike has a diagram and pics...have to read into the 2nd page if posts...
    V6 Air Cleaner Options
     
    Last edited: Jan 1, 2020
  17. Jan 1, 2020
    Focker

    Focker That's what I do, I know things and I fix stuff. Staff Member 2019 Sponsor

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    It didn't hold up, my friend made it out of the thinner 3D material. He said he could do it over, but I told him not to worry about it.
     
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  18. Jan 1, 2020
    Rustman

    Rustman New Member

    Charles Town, WV
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    I too am curious on the spacer. The parts and service manuals for the DJ-5A list a spacer on the Carter YF carb for the 153 engine. But I've never seen one anywhere and no dimensions are given.
     
  19. Jan 1, 2020
    maurywhurt

    maurywhurt Member 2020 Sponsor 2019 Sponsor

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    Here are the dimensions of the original spacer, on some excellent drawings by Wyomike: V6 Air Cleaner Options

    If an original spacer can't be found, it looks like this one from Speedway Motors (maybe the 2" tall version?) might work with some minor modification. One of the reviewers at the bottom of the page wrote "Worked on my 2-5/8" 2-barrel Rochester in my CJ5. Like a couple of other reviewers stated, I had to shave down the inside to get it to fit over my carb. I used a wire wheel and then sanded it smooth as I could. The fit is tight and it looks a nice product." :

    Stromberg Air Cleaner Spacers, 2-5/8 Inch
     
    Last edited: Jan 1, 2020
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  20. Jan 1, 2020
    Fireball

    Fireball Member 2020 Sponsor 2019 Sponsor

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    I have one of those speedway spacers and as noted in the review, it needs to be opened up a bit to fit the carb, but is otherwise fine.
     
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