V1 Old/OG fuel tank venting

[duthehustle93]

Hi All,

I'm having some trouble with fuel tank venting. The videos don't match my tank, and the only thing I could find that matches my tank is this old thread, but they never address venting. The vent on the factory filler is 5/16" and the vent at the center of my tank is 3/4". I'm assuming this is supposed to be the vent, since it has a rollover valve built into it.

Does anyone know how DF intended for the venting to be plumbed on these old tanks? My understanding on the newer chassis, they tee and one end vents to atmosphere and the other goes the factory filler tube.

Ideally, I'd like to weld closed the factory vent tube on the filler neck, and run a hose off the 3/4" tube on the tank to vent to atmosphere.
1) Does anyone know how this old tank venting is supposed to be plumbed?
2) is there any reason why I need to retain the vent tube on the filler neck if I vent to atmosphere?
3) Does anyone know if venting to atmosphere would be an issue for registering for street use in CA?

 

[Desert Sasqwatch]

Following the DF recommended vent hose instructions is probably your best choice. Hoses can be adapted to size and the open vent end should be mounted as high as possible to help prevent leaking fuel overboard. I'm sure you could bypass the fuel filler vent, but being in Cali could be a requirement to have this attached (the zero emissions fuel pump gadgets at all gas stations may not pump gas very well without this vent). Check with the Cali DOT to be certain of their requirements.