1967 Plymouth Barracuda - Fuel tank not vented properly??????

67Dart273 said

I don't know how that line is supposed to be secured on a fish, but that is EXACTLY how it is configured, with a "U" up high near the top of the fender.

And ending down into the frame rail is EXACTLY how it ends

If it is dripping fuel, it is VERY simple---your tank is too full. The fuel is clear up into the filler tube, clear up there at the vent line connection in the filler tube. Expansion will force the fuel up and over, and it will drain, until it gets below that point. In other words, "anti siphon" or "siphon breaker."

Your only correct solution is to not fill it that full.

Is it possible that your tank is damaged/ crushed and not as large as it should be?

Click to expand...

Was a new tank.
But you are correct in that I always try to "completely" fill my tanks when I gas up.
This is the first time I've EVER had this issue with any of my cars.

The applicable service manuel is not Barracuda specific. It's an A-Body manual.
That has consequences, in that start at p14-68 there are several diagrams with the vent tube that conflict on where it drains to.
One shows the overflow tube just exiting below the trunk floor.
Another has that tube re-entering the fuel tank.
(But that diagram has the filler tube on the opposite side from the vent tube....so maybe it is n/a for my model.)
And. they do not specify which is for the Barracuda.
So, I guess that I will just have to get under there and look at the tank.

But, simply venting out under the car doesn't make good sense.
But life itself was simpler back then.