Gas fumes?

It doesn't bolt to the tank.
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Joe K said:
Tank is vented and the vent is right on the cap itself -which is right in front of your windshield. Do you have your windshield open when you're smelling it?

You might try finding the vent hole and plugging it for a test. Your car will run for a while before a vacuum forms in the tank preventing the gas from going down to the carburetor.

Another leak that some don't think about is the bracket for the steering column. Don't know if you have the bracket that goes back to the dash rail, or the earlier bracket attached to the tank. Gas is wont to dribble down the steering column - right in your lap in effect - hence a strong smell.

I used to have a drip on the rubber mat directly below the inside shutoff valve. You have a compression fitting in a similar location but you may not see (or feel) a drip.

Gas gauge is always suspect. And given the right tools and gaskets (I like the original cork gaskets with some permatex to help seal) you can fix or re-do this easily to eliminate it from consideration.

Hairline cracks or rust throughs from the inside have happened before - but you'd see evidence at the lowest point of the tank - or directly below it. Bubbling paint usually precedes the rust throughs.

Keep checking around. A faint "Model A" odor is normal (I always assumed this a mix of the smell of quality along with some gas fume) but it should not be overpowering.

Joe K
Click to expand...

Ah, the power of a gravity fuel pump... Makes sense, like holding one's finger on a straw in a drink and pulling it out of the glass of water, air pressure prevents the water from draining out... So if the top of the fuel tank is fully sealed --the same effect, fuel cannot drain out of the bottom.
 
Very nice picture of the LATE steering column brace ! Well, thatpretty much eliminates one possible source of a gas leak (sure wise I have one of those late braces) ! Even if there is a miniscule gas leak, say out in the engine compartment, how are your firewall openings SEALED ? I would guess that they should be, but have so many in my firewall ('30 roadster), may as well leave top down,eh :)

BTW..I never liked the ford sealing system where the coarse thread connections are in the fuel delivery system (I use thread sealer by Permatex..works great) . I give you this piece of advice regarding such in search of fuel leaks....Before changing out your carb for new, carefully check the CARB INLET LINE AND HOW IT IS FASTENED to the carb. For instance if line is pushed/installed TOOO far into carb..trouble ! If not if far enough and/or sealing ring NOT seated correctly..trouble. Hey, leak could be that simple to diagnose/fix. Good luck
 
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