36 gas tank neck help !

Brian said:
I have never succeeded in getting the one in my 35 to seal; I've tried two tanks, I'm currently using a thick leather washer with a loctite product instead of the lead ring, I've got the proper 'C' wrench which I tighten with a length of pipe to increase leverage/torque, and if I fill my tank to the brim, it'll leak every time. Beats me!!
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I had to use 2 lead washers on my 35 PU.
 
Got the neck out, pipe sealant on threads of pipe threaded neck and it was not leaking. The leak was occurring at the second arrow where the flanged neck slides inside the pipe neck.
Had a lead seal (as pictured) and still leaked like a sieve.
Ordered a new lead seal but a lot of work if it doesn't work, remove fender, drain tank down.
Also pictured the the Drake flexible gas neck than will fit either of the diameter (very stretchable.
Tempted to go ahead and cut flanged neck off and connect to pipe neck with Drake hose.
Using gas proof Permatex pipe thread sealant worked very well on threads tho.

Welcome any ideas before getting out the cutoff tool.
 

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If the lead seal seemed OK and the threaded outer tube was tight, there is a another possibility. I have seen where road dirt has built up between the inner tube and the outer tube which resulted in rusted pin holes in the inner tube.
 
Filler neck is not drake, and the original is not rusty.
I am wondering if I should put the fender on and position the filler tube prior to tightening the threaded neck against the lead seal, otherwise it would seem you are taking a chance if you rotate the neck after you have seated it against the lead seal ??
 
Obviously this is the way to do it. Pays to leave the rear fender brace off too, to give you more 'swinging room' for the wrench. Also pays to have a helper to hold the filler neck in correct orientation from above, whilst you swing on the wrench from below....
 
Looking at these seals, I am surprised gasket material will not work, heck your carb and fuel pump have gaskets on them ?
 
I too am surprised...see my earlier post where I explain I'm currently trialling a thick leather seal [to no avail]. I cannot get lead to seal, nor peek [a special synthetic plastic stuff]. Beats me, it is damn hard to seal petrol for sure.
 
I think a friend can get his tig welding to seal after I cut the heck of one of Henry's bright ideas. The lead is not a good crush material to seal something as primitive as the flanged steel neck edge of the gas neck. If it was a flat surface to flat surface - maybe.

At least now I have a spanner to take it back off and fix it . Thats a positive.
 
Trouble with using o ring or gasket it has to be fairly thick and fuel resistant to seal the flange. If you just use a regular o ring it is not thick enough to absorb the crush needed to seal. Thats why guys are having to use two to ever get results.
I don't mind that but don't want to wait another week for a stupid lead ring to come. If I could get someone who will pri mail it please contact me . larryivy@cox.net
 
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