308 GT4 European Fuel System Vent Hose Issues

Dear Friends,

And most of you know I have a 1975 US GT4 and a 1974 restored European GT4. I've been smelling more gasoline in the cabin when driving the car but this is a separate issue. The US car has a plethora of hoses and canisters to vent the system, but it seems like the European one only has the one hose that comes out of the filler neck that drops down somewhere near the strap on the fuel tank.

In my infinite wisdom when I was working on the car, I put a longer hose on that filler vent and rolled it up a bit a couple of times thinking that if it overflowed it wouldn't spray hot gas out on something that would ignite it, (for example the exhaust system etc). What happened today was when I filled the gas tank up today the fuel filled up very high and completely filled up this drain/vent hose and then started emptying out and dumped all sorts of fuel all over the inner removable fender and on the pavement etc. My wife was having one of her rare drives in the car, and the smell of the gasoline inside the cabin was extreme.

Obviously if you plug up the fuel system, it won't allow it to work, so I was curious if any other Euro 308 owners, especially ones that work on their cars themselves, have done with this vent hose, how they've attached it to the vehicle, how low they let it hang etc. I thought I was doing a smart thing by rolling it up but obviously that was a mistake, and I'm trying to figure out a way to let it vent safely and effectively, without causing a fire danger etc.

I apologize for my long absence as many of you know I'm in a heavy metal band, and between the pandemic and me playing in the band, and also I spent quite a bit of time working on both cars, I haven't had that much time to interact here with all of my friends. I just wan let everyone know I miss them and would love to hear any suggestions on how to solve this problem, and or photos of how they have this hose situated. I will post the European and the US fuel system workshop diagrams and also a couple of pictures from my car!

Sincerely,

Rob

pics US version or reference
Euro one like mine, (Number 25 is the offending hose)
pic of my hose rolled

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Portofino,

Thanks for your reply. How low does your hose hang? Below the body, below the frame?

The blue hose was similar to the OEM green hose on the crossover for the US cars and the repro hoses for the vents hoses for the cooling system. I guess it was clear to see if any liquid was in there but that's just a guess. I am running the Dave Helms fuel hoses on my 75 US car and will probably swap that out next time im in there, this was a frame off restoration, just trying to sort out everything!

There is a weird small tube in the filler neck of the Euro car which is not in the US one I will take a pic and post it!

Rob

 

Steve, and all,

Thank you all for your responses. Those crossover pipes are a lot lower than the fuel tanks if I let it hang down that low it's gonna look like the AC vent hose! I think Al had it cut before the bottom of the strap and was dripping on the strap which he painted black, that is why I added the extra length. I think Bill might be right about the plugged system I wonder if there is anywhere else the tanks vent to the atmosphere on this system? Still having a little bit of a stumble off idle but past that the car screams to redline I am thinking that little tube in the filler neck is what goes to that vent hose, there is not one on the US car. I also couldn't find the fiberglass bucket the fuel filler pipe sticks up through, (just below the Filler door) I was looking for it because there's another wider ID clear blue hose that hooks onto that part, I assume if you really feel up so much that it overflows the whole filler tube, that is the drain for that?

here is the US part (I cant find in the parts book) with the larger vent pipe coming off it, and one of Dave Helm's hoses on the US GT4. That stuff is amazing, he had ex NASA scientist working on it. Anyway unlike the OEM stuff it is very flexible to install there!!

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Steve, of course you're right. I will crawl under there and figure it out!