[lturner1954]

I have a 66 GTO that I have replaced the fuel tank with the correct tank with vent tube and a vented cap. The previous tank did not have the vent tube nipple.
When the car is in a single car garage and it gets warm inside, after a while there is a strong smell of gas fumes.
New seal was used when installing the sending unit and all line are in good shape. Am I missing something here and what can I do to solve this problem? Certainly don't want something blowing up because fumes got the hot water heater.

Thanks
Larry

[Jonsie]

As the garage heats up, fuel is expanding, forcing fumes out of the vents. I think with the vent tube, cap should be "Non-Vented" ? Maybe someone else can chime in on that; ie: either vent tube OR vented cap, not both. Regardless, you are still going to smell some fumes as the gasoline heats up. Maybe best to open a couple windows, get some cross-draft on hot days

[Jeff Hamlin]

...NON-VENTED CAP.

[JAL71TA]

Does that apply to a 71 TA as well? Ive noticed the same thing as Iturner1954,

[oldgoat16]

Check the U shaped vent tube as well, at5(3 trunk area, I found mine to be blocked up by those little buggers that make sand castles under our cars, ! Use compressed air and a steelthin wire to make sure it’s open

[JAL71TA]

Will do, thanks.

[OG68]

Make sure your fuel evaporative system is fully hooked up. A 71 should have a completely sealed system without vents to the outside air.
Having a good operating evaporative system brings the fuel smell down to zero if there are no other issues such as a leaking tank.