fuel leak a sediment bowl threads

Paul in Ontario · Jun 12, 2011

Farmall H gas tank weeping around threads into tank had tank cleaned and lined cleaned threads with 3/8 npt tap installed new sediment with seal all on threads cured for two weeks before refueling and started to weep almost immediately. Anybody got any suggestions or remedies.
Thanks in advance for replies
Paul in Ontario

snoop-nc · Jun 12, 2011

PAUL...what did you use for sealant? Teflon tape should be OK if carefully wrapped on the threads.

Good luck!!

Rick

Paul in Ontario · Jun 12, 2011

Rick
I used a product called "SEAL ALL" which is a thick clear liquid petroleum resistant thought teflon would go to gum with gasoline contact but willing to try
Thanks Paul

redtom · Jun 12, 2011

We use "leak-lock" at work which is a blue sealant mostly for LP fittings but I've had good luck with it on gas tanks too. teflon tape on those sediment bowl with tired threads seems to be a waste.

Tyler Jackson · Jun 12, 2011

Mine did the exact same thing. I just put some thread tape on it. Doesn't leak at all now.

S2710 · Jun 12, 2011

If a different sealent does not work you may have to screw the sediment bowl in another turn or a part of a turn and then you will have to rebend your gas line to fit.
Bob

snoop-nc · Jun 12, 2011

You should be OK especially if you do NOT let the tape overlap the end of the fitting and get (directly) into the stream...leave a couple threads clear from the end.

I've seen that stuff...teflon tape...come in different thicknesses. To me, the really thin stuff is a PIA to handle and would probably need an extra couple wraps to be effective. Try to get some of the thicker stuff.

You'll need to re-wrap if you have to remove the fitting and you'll know more about how much tape to use.

Good luck....Rick

Tony in Mass. · Jun 12, 2011

I'll say like beetlejuice, 'don't ya just hate it when that happens?' Murphy's law sez nothing gets fixed the first time. OK, I used pvc on one, no problems ever since. used old fashioned plumbers puddy, or plumbers dope? on another, just as good years later. I'll tell you another thing concerning Murphy's law- some stuff I am shy of retapping, sometimes a gummy too tight thread is a good thing, this might be one of them... good luck!

Patsdeere · Jun 12, 2011

They make a special teflon type tape that is made for petroleum products. It is yellow and comes in a yellow spool (like normal tape does). It is a little thicker than regular teflon, but in all the places I have used it it hasn't leaked or anything.

fixerupper · Jun 12, 2011

Slight chance there's a crack? Highly unlikely but you never know. Take a bright little LED flashlight and get up close and personal with the threaded hole and look it over close for a very fine crack. I've never seen a crack in fuel tank threads but it wouldn't hurt to take a good look. Just a shot in the dark thought! Jim

Bob · Jun 13, 2011

Use a thread sealant APPROVED for petroleum products, Gasoila, for example. END of problem.

fuel leak a sediment bowl threads

Paul in Ontario

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snoop-nc

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Paul in Ontario

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redtom

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Tyler Jackson

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S2710

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snoop-nc

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Tony in Mass.

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Patsdeere

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fixerupper

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Bob

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