68 charger fuel filler vent line- make one?

[koosh]

After the fuel filler tube and new fuel tank got installed, I noticed there’s a nipple near the top of the filler tube, and another, on the fuel tank next to the actual fuel line…see pics.
Researching this vent line, saw one from Classic Ind for $20+ shipping, others were closer to $50.
Can this be made out of “bendable brake line”? Or has anyone just used fuel line hose from one end to the other with clamps?

 

[koosh]

After reading more internet answers, one implies the vent tube from the top runs down along side of the big filler pipe, then go through a hole in the trunk floor and just ends there? The extra tube coming out of the tank, which has nothing on it right now supposedly is for a vent return line to a canister? Which I do not have.

 

[MWbirdLOVER70]

After reading more internet answers, one implies the vent tube from the top runs down along side of the big filler pipe, then go through a hole in the trunk floor and just ends there? The extra tube coming out of the tank, which has nothing on it right now supposedly is for a vent return line to a canister? Which I do not have.

Canister? Was that emissions stuff starting in 72?

 

[koosh]

Canister? Was that emissions stuff starting in 72?

Idk! Lol

 

[BLK 68 R/T]

After the fuel filler tube and new fuel tank got installed, I noticed there’s a nipple near the top of the filler tube, and another, on the fuel tank next to the actual fuel line…see pics.
Researching this vent line, saw one from Classic Ind for $20+ shipping, others were closer to $50.
Can this be made out of “bendable brake line”? Or has anyone just used fuel line hose from one end to the other with clamps?

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What you have circled there on the sending unit is for the fuel return line. Not sure on other years but 68-70 440 and Hemi cars all had a vapor separator mounted to one of the fuel pump bolts with a 1/4” return line back to the tank through the sending unit. As for the vent line on the fuel filler, yes, you can just make your own out of a brake line. It does in fact just run down the fuel filler and goes through the trunk floor into the top of the drivers side frame rail. Dead ends in there just open, nothing on the end. There is a rubber grommet where it passes through the trunk floor.

 

[BLK 68 R/T]

Also you might want to get a grommet installed where your wires run through to your sending unit. Good spot for a short to ground if it rubs through the insulation

 

[koosh]

What you have circled there on the sending unit is for the fuel return line. Not sure on other years but 68-70 440 and Hemi cars all had a vapor separator mounted to one of the fuel pump bolts with a 1/4” return line back to the tank through the sending unit. As for the vent line on the fuel filler, yes, you can just make your own out of a brake line. It does in fact just run down the fuel filler and goes through the trunk floor into the top of the drivers side frame rail. Dead ends in there just open, nothing on the end. There is a rubber grommet where it passes through the trunk floor.

Ok, since there is no mechanical fuel pump (now electric-in tank), and no vapor separator, do i just cap off that 1/4” nipple located on the tank sender unit? Or should i connect the vent line from the top of the fuel filler tube down to this nipple?

 

[70 sublime]

Do not hook the breather line from the filler neck to the small extra line coming off the gas tank
The line on the filler neck is there to let the air get back into the gas tank from when you use fuel out of the tank
If you hook the two places together you will collapse the gas tank with suction and your car will stop running

Yes you need to add the line to the filler hose down to the frame rail or else your trunk will just fill up with gas fumes when the car sits outside on a sunny day

 

[koosh]

Do not hook the breather line from the filler neck to the small extra line coming off the gas tank
The line on the filler neck is there to let the air get back into the gas tank from when you use fuel out of the tank
If you hook the two places together you will collapse the gas tank with suction and your car will stop running

Yes you need to add the line to the filler hose down to the frame rail or else your trunk will just fill up with gas fumes when the car sits outside on a sunny day

Ok, so install a vent line from top of filler tube, down along side of the filler tube, through the trunk floor to somewhere on the frame? I assume i could use rubber fuel line for this?
And cap off or plug the gas tank nipple, correct?

 

[BLK 68 R/T]

Ok, so install a vent line from top of filler tube, down along side of the filler tube, through the trunk floor to somewhere on the frame? I assume i could use rubber fuel line for this?
And cap off or plug the gas tank nipple, correct?

Yes, you will want to cap off the return line port on the sending unit. Rubber hose will work for the vent line. Metal line will look nicer and more correct in my opinion, but it’s your car so go with rubber if you want.

 

[70 sublime]

I looked around till I found a picture on line
This is a bit of a beef with me in this area
I put a new trunk floor in my 69 Charger once
I started out trying to patch the floor cutting out the bad spots so my old pan ended up in a bunch of small pieces
In the end I changed the whole pan
I had saved the original part of the pan that had the hole in the floor for the gas tank filler pipe to go down through
On all of the after market pans I have ever seen they never punched out the hole for the vent tube
All the B body pans are the same other than the Charger had the big hole for the fill pipe
All the pans had the same holes punched out for the plastic plugs to fit into like factory
There should be 2 holes in the floor beside the opening for the filler tube but they only come with one
The second hole should be drilled out as you can see in this picture of an original 69 Charger floor
The breather place is back farther and more protected