Gas Tank vents

[pandamarie]

The 70-71 had the 4 vent tubes on the gas tank, that was for California emissions later to be used on all cars with the addition of the charcoal canister If you need it I can post pics from the shop manual.

[dawgs 73]

Sorry if I'm a little slow here, but I do need the help. With that being said, is the best way to block off the tubes on the tank to just loop fuel line from one to the other? Or will there have to be something else done to do away with that system? Like something under the hood as well..............

[Bullitt-]

dawgs, looping the lines will effectively seal the tank, you stated earlier that you have no charcoal canister therefore there is nothing under to hood to worry about.

[dawgs 73]

Bullitt
You're right. The heat is making me crazy........... and my brains keep dribbling out of my ears. I hate being told the obvious, especially when I already know the answer.

[Bullitt-]

dawgs, Better to ask than not be sure....Let me say this is a functional setup but depending on where you live there may be inspections that this would not pass(would be fine in Alabama)

[dawgs 73]

This will work in Missouri as well. My car is old enough that it doesn't require any kind of emissions test. I found a gas cap for a 1970, but the cap is too big for my fill tube. I am going to have to drill my cap, I guess, but I don't know for sure where to drill it to allow for the venting, or how big the hole(s) should be. So......... unless I find a different fill tube to use, I'll still need an idea as to where and how big to drill.

[patrick]

  O.K. Now you got me wondering. I had the canister in my 73 Rallye. The only line that was hooked up was the one from the gas tank. I detailed my engine bay, and in doing so, I got rid of the canister, didn't like the look's of it and figured it wasn't doing anything anyway. I left that line there,stuck a piece of foam in the end of it and hid it down behind my window washer bottle. Will this allow my gas tank to breathe, or am I going to implode. The owner before me, got rid of the pollution stuff, except for the charcoal canister. I put the foam in the line so dirt or whatever wouldn't get inside. Did I do O.K.? Or did I screw it up? Thank's, Pat

[Bullitt-]

Pat, I think functionally you will be alright....you may smell gas fumes from the open line under the hood from fuel evaporation.

[patrick]

   bullitt99.  What if I removed that line back at the gas tank and put some kind of breatheable filter on it there. I haven't noticed any gas fume's anyway but just want to be safe. I have a locking gas cap under my flip top cap. I don't really want to drill a hole in it. I hope somebody didn't already ask this and I missed it. Thank's Pat

[Bullitt-]

patrick, it would only change the place that fumes might escape....If what you have is working just leave as is....seems as though there should be some kind of one way vent that could be adapted for the purpose.

[Bullitt-]

what do ya know..
http://www.kevinscycleracing.com/intakeandcarburetor.htm
ONE-WAY CARBURETOR VENT HOSE CHECK VALVES Special miniature One-Way Check Valve will allow your carburetor to properly vent and drain as necessary, while helping to protect your carburetor and engine from water traveling up the vent lines. Place inline with the arrow pointing to the ground. Sold Each. $4.95

[patrick]

   Thank's bullitt! I think you just helped out all of us. I just won't tell anybody I got cycle part's in my Challenger. :cheers:Pat