gas tank nipple?

[New2Me]

So I was prepping my tank for paint and noticed this once sealed nipple on the back of the tank, is no longer sealed. Free flows into the tank now. I'm not sure what its exactly for or whether I should reseal it with something or not. I assumed it was for a vac line before all this.

Any thoughts on what I should do?

[jwhughes3]

Overflow

There is a hole under the chrome of the gas cap trim that follows a line through the tank out the back to flow to ground.

It should not go into tank. If it does the line is rusted out. Thats why it was sealed off I bet, to save the tank.

John

[natemoen]

John Is right. it should not go into the tank. If so plug it, as well as the opening at the top.

[jwhughes3]

Good point

Good point Nate.

Gotta plug both ends or first rain you will have a full tank of H2O!

John

[New2Me]

Oh so that is just a drain for the gas cap area! Well I will have to be cautious with water on the tank. Thanks guys.

[CaptonZap]

The parts bike I bought had the rusted out drain line problem. So, being cheap, I took a 3/16 drill bit and drilled down through the drain at the top, and in through the outlet at the back of the tank.
Then I took a piece of 3/16 copper tube, and bent it to the aproximate shape needed to get from "there" to "there". It took a little fishing, and a couple of tweeks to the bends, but when it was in, A SMALL oxy/acyl torch allowed brass to be applied. If one were meticulous with cleaning, and had the proper flux, solder could do the job as well.
One more tank saved from the scrappers, and the original paint is still useable, since the front of the seat covers the drain spigot, and the tank lid (standard lock type) covers the drain inlet. The only down side is that the drain hole is small, so if you drop a beef jerky shred down there while fueling, you may have a problem. CZ

[natemoen]

The parts bike I bought had the rusted out drain line problem. So, being cheap, I took a 3/16 drill bit and drilled down through the drain at the top, and in through the outlet at the back of the tank.
Then I took a piece of 3/16 copper tube, and bent it to the aproximate shape needed to get from "there" to "there". It took a little fishing, and a couple of tweeks to the bends, but when it was in, A SMALL oxy/acyl torch allowed brass to be applied. If one were meticulous with cleaning, and had the proper flux, solder could do the job as well.
One more tank saved from the scrappers, and the original paint is still useable, since the front of the seat covers the drain spigot, and the tank lid (standard lock type) covers the drain inlet. The only down side is that the drain hole is small, so if you drop a beef jerky shred down there while fueling, you may have a problem. CZ

Well done CZ! Good plan!

[jjz28]

does the 79 special have this? I have never saw nothing like that and just wonering if my tank is missing something.

[natemoen]

does the 79 special have this? I have never saw nothing like that and just wonering if my tank is missing something.

Only the standard tank has this because of the recessed gas cap.