Gas tank fill vent hose
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Fleet Owner
Joined: May 2009
Posts: 21,437
Likes: 76
From: Gilbert, PA
Gas tank fill vent hose
I have a new fill hose for josh's 79 aft axle tank but i am missing the small vent hose that goes from the tank to the filler neck. Can i just use some heater hose or will the gas eat it up? If not, where can i get one?
Laughing Gas
Joined: Dec 2007
Posts: 796
Likes: 1
From: Minnesota
I wouldn't use heater hose. I bought mine by the foot at car-quest for fuel hose. I don't remember the diameter. I even bought the big filler hose there by the foot. I am sure a good parts store could get it.
Freshman User
Joined: Aug 2009
Posts: 31
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Can you explain that? Mine is a PITA to fill, I have to just dribble the gas in or it will pour out. I was thinking it was a venting issue.
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Laughing Gas
Joined: Oct 2009
Posts: 874
Likes: 56
From: Merlin, OR
Filler hose
Might check the condition of the filler hoses, sounds like it might be collapsed, which tends to happen to them with age. And if it's pre 77, it tended to happen more, used to have to fill my 75 f150 slowly or that would happen.
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Junior User
Joined: Jun 2010
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From: Helena, AL
I would be interested in the answer this too, mine does the same thing
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
The filler hose and vent hose came taped together in two spots from the factory. It's not obvious to me why it helps, but several members, including myself, have experienced a noticeable reduction in filling problems when taping the hoses together per the factory setup. My guess is that taping the hoses together helps keep them straight and prevents them from collapsing.
A couple years ago, all of the sudden my '79 would not fill, at all. I could not for the life of me figure out why, because both the filler hose and vent hose were in good shape and had not collapsed. The tank was free and clear of obstructions. Out of desparation I replaced the filler hose and vent hose, and the problem went away for the most part. Going the next step and securing the hoses together almost completely eliminated the problem, and I can't remember the last time I had trouble filling the tank.
A couple years ago, all of the sudden my '79 would not fill, at all. I could not for the life of me figure out why, because both the filler hose and vent hose were in good shape and had not collapsed. The tank was free and clear of obstructions. Out of desparation I replaced the filler hose and vent hose, and the problem went away for the most part. Going the next step and securing the hoses together almost completely eliminated the problem, and I can't remember the last time I had trouble filling the tank.
FTE Chapter Leader
Joined: May 2001
Posts: 3,322
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From: Rhode Island
You need to tape the fill hose and the vent hose together in order to allow the tank to vent while filling. If your vent hose is sitting lower than the fill hose the tank will not let the fuel vapor escape from the tank thus not allowing you to fill your tank.
We run into this issue alot in the body upfitter world. Lots of customers bring the trucks back to us with fill issues after they do a home install or a retrofit or it was too close to quiting time in the shop! When you start running 2-3 foot fuel fills you really have to make sure the vent hose is above the fill hose!
We run into this issue alot in the body upfitter world. Lots of customers bring the trucks back to us with fill issues after they do a home install or a retrofit or it was too close to quiting time in the shop! When you start running 2-3 foot fuel fills you really have to make sure the vent hose is above the fill hose!
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