fuel tank question

[IdahoBen]

The fuel inlet to the tank had not been connected.  I pulled the back seat to get to the tank and found this plumbing on top of the tank with 2 rubber lines cut off but going up on the passenger side into the headlining.  the metal tubing comes out like a vent on the left and on the right, making a loop and connecting to each other with a t in the middel and a rubber line coming out but cut off after a couple inches.   this is not shown in the repair manual or the parts catalog.    Lots of questions I have.   lol

[Dwight FitzSimons]

WTF!  I have worked on a couple of these & have never seen anything like this.  All I can say is to put the fuel-tank attachments back to original.  One issue with these is the vent hose that goes off the top, then over & down near the right rear wheel.  Over time that hose will crack & let gas fumes into the cabin.  That issue has been discussed on this forum (maybe also on SDC Forum).

--Dwight

[ronmanfredi]

From the factory, the vent hose went from the top of the tank into the sail panel next to the rear window and looped around then dropping down to where it exited under the car.  The loop was there to prevent fuel from escaping through that line when the tank was full due to gravity and some pressure.

[Dwight FitzSimons]

Some have used a modern activated-charcoal canister to replace that vent hose.  That was described in a thread on here (or the SDC Forum)

--Dwight

[Bob Preston]

It looks as though someone made an effort to redirect fuel tank vapors for some reason. Perhaps the original vent hose loop was compromised so the quick fix was to drill a few more holes in the tank and add some plumbing. 
 

As Groucho Marx once said: “ The problem with making something foolproof, is that fools are so ingenious.”

[Skip Lackie]

Not sure this will help, but here is my stock 74 gas tank.