1948 UL fuel tank cross over fuel line

[panhead]

You can mail the pictures to me.

[Eb74UL]

Panhead, did you mean send by mail through PM?
I tried that, there was a button to join a file, I clicked on that button and chose the pict on my computer, it said something like "file upload completed" but I do not see the picture attached in my outgoing PM section... I am trying...

[panhead]

Have you read this: How to add a picture/attachment to your post

Follow it step by step.

[Eb74UL]

Picture finally!
Sorry I do not control the orientation of the picture... it keeps on putting itself at this angle, but you get it for sure now.
Thanks to Panhead for his patience!

[Andygears]

Looking at the picture, it looks like the correct fitting but has the end cut off. Time and patience with a file can create a new point on that nipple, best solution, IMHO.

Andygears

[RooDog]

One of these could be made to work....
Or something similar.....

https://www.hemiperformance.com.au/shop ... vg-vh.html

[Eb74UL]

Sorry Andy, cannot be done, look at the size of the hole of the tank nipple, it is just about the same diameter as the outside of the cup of the line taper.
When I rest the hose end on top of the nipple, the inside edge of the taper sits just Even with the nipple hole, no way I could grind a cup that would fit inside the hose taper, this is why I thought for a while that this could be meant to work together because inside edge of the line cup is a match to the nipple hole but hell no way this would seal!

So this is why I plan to enlarge the hole of the nipple a little bit and machine an AN fitting to fit inside the nipple hole with the cup of the AN fitting facing out...

The AN fitting below is a #3, the hole is small indeed... Fuel transfer is not going to be the greatest, perhaps I could also enlarge it a little but I need to leave some meat for an insert into the nipple hole to limit fuel seeping out of the nipple adapter.

[Eb74UL]

You got it RooDog! That is what I was looking for. The difficulty is to find the right size and I wonder about the strength of the brass... I'll order one of these to find out. I wonder how much it will cost me to get the AN fitting machined! I take the strength issue out, if its strong enough for brakes it will work for this application. its just a size issue...

[RooDog]

The brass cone will be captured and in compression. Strength shouldn't be an issue....

[RooDog]

Just thinking out loud:
Is there room to drill & tap the tank fitting for a 1/8" NPT,, and then simply screw in an AN-4 nipple and use AN/JIC plumbing.
For that matter if there is room to drill & tap, then a standard 45* flare fitting could also be installed, no?

[59Panman]

How about cut the end of the tank bung flush at the ends of the threads, install a female AN4 on the bung and then attach the fuel line? Or cut the flare off the fuel line, enlarge the bung to accept the the fuel line, slip James Gasket fuel line seal over the gas line, push fuel line into the bung and tighten.

Or use this RaceFlux AN Female Flare to AN Male Flare Reducer / Expander? Not black! but another finish?
https://www.anhosefittings.com/an-femal ... ander.html

JAMES GASKETS (SEAL, GAS LINE)

Seal, Gas Line, 1950-1965, FL, FLH
JGI-62360-50
Package of 10

http://store.jamesgaskets.com/product_i ... cts_id=917

[Eb74UL]

RooDog: Not much to do with the nipple, outside diameter is 7/16, hole is 3/16, no way to use 1/8 NPT and then I would need 1/8 NPT to AN-3 to use my solid fuel line, I don't want to mess with that nipple much or I'll end up wasting my paint job, not that it was an expensive one but I have done so many things twice now my patience is gone...

50Panman: The female AN-4 to AN-3 reducer is interesting but it would mess the look for sure, cutting the flare and use those James rubber seal would likely be the best alternative to the machining of an AN-3 or a master cylinder seat insert, those seal can be coated with some kind of sealant... There is no pressure there, it's just sitting gas in a tank. it depends of the size, if they need to be buffed down they would likely leak... done that before with very limited success... Would have to make sure that the line cannot slip out though...

I am having a second thought on the master cylinder insert, it is likely that those need to be pressed in with some significant pressure, don't see how I could do that unless I make some kind of tool that screws on the nipple to press the seat in, I don't think they could be turned down much to fit in the nipple hole but I'm keeping it in mind, I might get some of those rubber seals as a last resort, they look like those used on a shovelhead oil line, they don't leak...

[RooDog]

Has anybody stated exactly what the thread size of the tank's nipple is?

How about a compression fitting in the style of those used on Shovelhead rocker box oil lines, or on the hang on oil filter?
Much like the one pictured here on the right. But instead of the brass collar, use an O ring or two. The whole concept depends on a compression nut with the same screw threads as the tank nipple. Get the threads to match, and the rest is easy.....
The tubing will have to slip partly up into the nipple, but most likely not more than 1/8-1/4", in a drilled counter bore.
And it will all look factory, and cost very little.....

[59Panman]

Maybe try this connector. Thread it onto the tank fitting not sure of the sizes as you would have to measure them, cut the flare off your gas line, put on another fitting that mates to the taper and then put the flare back on the fuel line?

Part #: 2406-06-05
2406-06-05 | 3/8" JIC Female x 5/16" JIC Male

https://www.discounthydraulichose.com/2 ... -male.html

[Eb74UL]

RooDog: I have to admit I did not think of the compression fitting idea at all... maybe, I think the width of the tank nipple could be big enough to drill a taper, the fuel line would have to be cut immediately after the flare because the bend to the other side is not far from the nut. The only draw back is if I have to take it apart, compression fittings don't like that very much... I have not measured the thread but I would guess it is standard 7/16 fine. I'll post it later. I think the compression fitting could be used with the HD nut, it likely has a taper that fits the back side of the flare, may not be too far from the taper of the compression fitting. I'll see how much it cost me to machine the AN fitting and then decide. Definitely looking at buying a small lathe soon, looking at the lathe/mill combo any of you guys got that?

59Panman: If I really could find a fitting like this that would work I'd get one for sure but again take a look at the picture of the tank nipple, it is dead flat at the end, nothing will seal against this unless it is also flat and you put a gasket in between.