Fuel System Leaks: 1966 Coronet - Pics Included

[watermelon]

Hi All,

A while back I found out I had a leaky gas tank at the point where the inner-filler tube and gas tank meet. Also, it appeared as if the inner-filler tube backed out of the tank itself. The pic below shows the leaking areas in yellow:

I used that as an opportunity to clean out the entire fuel system.

In restoring eveything I replaced the leaky grommet with a new one. However, the leak persisted at the same spot.

Another pic:

At this point I was comtemplating the following solution (let me know if this makes sense):

1: Weld on a 90 degree (or other angle) piece of steel tubing to the point at where the original inner-filler tube would have been inserted into the tank

2: have that new welded-on piece extend a few inches toward the inner-filler tube & also cut the original inner-filler tube a few inches at the tank end

3: span the gap between the newly welded-on piece and shorted inner-filler tube with rubber hose


I mainly want to get rid of the grommet (i've had the luck of leaks at that point).


Other pics for reference:

Also, this is the gas cap that is currently on the car:

Can I use a newer sytle gas cap? I have heard of "vented" gas caps. What do you recommend?

I think my inner-filler tube backed out of the tank because of pressure in the tank. Is that possible?

That is why I think I need a new gas cap too.



Let me know what you think.


Thanks,

watermelon

 

[watermelon]

update

Well I went ahead and modified my fuel tank a little.

The welds look ugly but the tank passed the leak test. I just did a test fit. I'll probably weld a bead around the edge of that exhaust piece.

This was a prototype. I'll probably be ordering a new tank and do a cleaner job the next time around.

See pics below:

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I may or may not use the original inner-filler tube. I found some pieces that will probably do the job.


watermelon