The Ford Barn - View Single Post - 1934 pickup leaking fuel from filler neck

Mart · 08-15-2018, 05:52 PM

I fixed this on my 33 coupe.

I fitted a thick rubber seal from a modern cap to the cap and that stopped the leaking.

But I needed to create a vent (non stock sender unit). I took a piece of 3/16 steel brake line and threaded one end 10-32 UNF. I fitted a nut to this and used it in place of one of the sender screws. the pipe was bent with a couple of corkscrew turns and has a fuel filter attached to it. As far as I can tell, it does not leak fuel.

The thick rubber seal makes the cap tight to remove and refit, but it is do-able using two hands to get it started when loosening and tight when refitting.

Prior to this I had made up a sort of baffle system in the filler neck, and modified the cap to seal against the baffles in an attempt to stop fuel sloshing out. This on it's own was not enough.

The combo of the thick seal and the baffles did the trick.

I think the mention of the jb weld above was regarding the seam that got soldered, nothing to do with the cap.

Mart.

08-15-2018, 05:52 PM	#7
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,754	Re: 1934 pickup leaking fuel from filler neck I fixed this on my 33 coupe. I fitted a thick rubber seal from a modern cap to the cap and that stopped the leaking. But I needed to create a vent (non stock sender unit). I took a piece of 3/16 steel brake line and threaded one end 10-32 UNF. I fitted a nut to this and used it in place of one of the sender screws. the pipe was bent with a couple of corkscrew turns and has a fuel filter attached to it. As far as I can tell, it does not leak fuel. The thick rubber seal makes the cap tight to remove and refit, but it is do-able using two hands to get it started when loosening and tight when refitting. Prior to this I had made up a sort of baffle system in the filler neck, and modified the cap to seal against the baffles in an attempt to stop fuel sloshing out. This on it's own was not enough. The combo of the thick seal and the baffles did the trick. I think the mention of the jb weld above was regarding the seam that got soldered, nothing to do with the cap. Mart.