Auxiliary tank filler vent hose

Jeff76 · Feb 24, 2012

HAving trouble finding a 90 degree auxiliary tank filler vent hose. Turns out the PO installed what appears to be 5/8" straight fuel line, and this cannot make the 90 degree turnout necessary without kinking. Result is the inability to fill the auxiliary tank on my '76.

Any ideas on where to find one of these? Looked at JBG and Tom's to no luck. NAPA only has straight hose, and the parts guy could not think of an alternative. Picture is the one I pulled off.

broncomatt · Feb 24, 2012

My suggestion is to get a copper 90 and use a short piece of fuel hose to the 90. Should fit.

g8rb8t · Feb 24, 2012

This is what I used on my '76 when I had it. I didn't recall it being a 90 though?

http://broncograveyard.com/bronco/i-10255-vent-hose-auxillary.html

Jeff76 · Feb 24, 2012

g8rb8t said:
This is what I used on my '76 when I had it. I didn't recall it being a 90 though?

http://broncograveyard.com/bronco/i-10255-vent-hose-auxillary.html

Not sure what that is, really. If its 3/8" or smaller, it could be the emissions breather hose that runs to the charcoal bottle. What I am looking is 5/8" and goes from the tank to a hole in the filler tube to allow air out while you pump gas in. The way mine was kinked, it was almost impossible to fill the tank.

Jeff76 · Feb 24, 2012

broncomatt said:
My suggestion is to get a copper 90 and use a short piece of fuel hose to the 90. Should fit.

Yes, that is a good idea, and it should work. Was trying to keep it simple, though. I was actually surprised when the guy at Napa said he did not have a 5/8" fuel hose with a 90 degree bend in it.

g8rb8t · Feb 24, 2012

Jeff76 said:
Not sure what that is, really. If its 3/8" or smaller, it could be the emissions breather hose that runs to the charcoal bottle. What I am looking is 5/8" and goes from the tank to a hole in the filler tube to allow air out while you pump gas in. The way mine was kinked, it was almost impossible to fill the tank.

Yeah, that's the vent hose pictured that I used from tank to filler neck vent. That's not the charcoal bottle one. If I recall correctly it's 5/8" (almost positive).

g8rb8t · Feb 24, 2012

Knew I'd remember it...here's where I asked the same thing, looks like I used 5/8" from Napa not the Graveyard one:

http://classicbroncos.com/forums/showthread.php?t=147906

Jeff76 · Feb 24, 2012

g8rb8t said:
Knew I'd remember it...here's where I asked the same thing, looks like I used 5/8" from Napa not the Graveyard one:

http://classicbroncos.com/forums/showthread.php?t=147906

OK, Thanks. I found a picture of another install somewhere, and it looks like they used a straight line as well. I'll try to get a slightly longer hose length, and see if I can make the turn without putting a kink in it. Thanks again.

JefeAZ · Feb 24, 2012

Just finished my aux tank install and I have the same exact problem. It kinked but not too bad. Thought it would work but cant give the pump more than a 1/4 pressure without gas trying to come back up the neck.

A braided/pressure rated fuel line would work as it will not kink but the problem is cutting it to length and getting it on the line and tank nipple. If you can easily collapse the line with your fingers dont waste your time. No matter what length you cut it to it will kink

I like broncomatts idea and may try that. Ill put a 90 on the filler neck and run a straight hose off the tank. and of course paint it black...

oleguy74 · Feb 24, 2012

the molded hose from t-stat to water pump.might work.

Jeff76 · Feb 29, 2012

JefeAZ said:
Just finished my aux tank install and I have the same exact problem. It kinked but not too bad. Thought it would work but cant give the pump more than a 1/4 pressure without gas trying to come back up the neck.

A braided/pressure rated fuel line would work as it will not kink but the problem is cutting it to length and getting it on the line and tank nipple. If you can easily collapse the line with your fingers dont waste your time. No matter what length you cut it to it will kink

I like broncomatts idea and may try that. Ill put a 90 on the filler neck and run a straight hose off the tank. and of course paint it black...

Just went through the same process. While the picture I posted makes it look easy, the way my tank / vent hose works out it will not run the angle with out kinking. I bought a copper 90, but can't make myself install it. Just seems like a problem waiting to happen.

Found this at Autozone. PVC hose exact size and shape I need. Anybody have an opinion it this would hold up the the demands of the aux tank vent hose requirements? Would it deteriorate with the gasoline exposure?

Hozr · Feb 29, 2012

silicone heater bypass hose or a pice of wire reinforced fuel transfer hose.

JefeAZ · Mar 1, 2012

Jeff76 said:
Found this at Autozone. PVC hose exact size and shape I need. Anybody have an opinion it this would hold up the the demands of the aux tank vent hose requirements? Would it deteriorate with the gasoline exposure?

That piece might work. Put it on the filler neck side as high as it will go and connect it with another 5/8" straight piece. Whatever you connect them with cannot severely reduce the inner diameter of the line though. If it works, only the air that is being displaced in the tank will come into that line

Dorman makes these as well(Part # 800-038):

Should be able to get an 11/16" line on there...More flow the better not sure if anyone sells that though. 3/4" would be too big

Woops I read that as PCV thinking it was rubber. Should be fine according to these guys:

http://www.jenseninert.com/chemical-resistance.htm

How are you going to connect it to the metal vent line though?

Jeff76 · Mar 1, 2012

JefeAZ said:
That piece might work. Put it on the filler neck side as high as it will go and connect it with another 5/8" straight piece. Whatever you connect them with cannot severely reduce the inner diameter of the line though. If it works, only the air that is being displaced in the tank will come into that line

Dorman makes these as well(Part # 800-038):

Should be able to get an 11/16" line on there...More flow the better not sure if anyone sells that though. 3/4" would be too big

Woops I read that as PCV thinking it was rubber. Should be fine according to these guys:

http://www.jenseninert.com/chemical-resistance.htm

How are you going to connect it to the metal vent line though?

It is Rubber. I put it on today, and it fit perfectly. Tight fit on both sides, as if it were made for the application. Still not sure if it will handle the gasoline over time, but it looks slick. I'm going to run it, but I've got some work to do before I'm ready to put any gasoline in that tank though.

JefeAZ · Mar 1, 2012

That is a PCV piece. Looks like your box was printed wrong lol

http://www.dormanproducts.com/p-32423-46025.aspx

That piece was long enough to reach the tank? How much was it?

$12 here, free shipping: http://www.amazon.com/Dorman-46025-PCV-Valve-Grommet/dp/B0065V2YPM

Jeff76 · Mar 1, 2012

JefeAZ said:
That is a PCV piece. Looks like your box was printed wrong lol

http://www.dormanproducts.com/p-32423-46025.aspx

That piece was long enough to reach the tank? How much was it?

$12 here, free shipping: http://www.amazon.com/Dorman-46025-PCV-Valve-Grommet/dp/B0065V2YPM

You are correct, its a PCV replacement. I found it on the shelf at Autozone, and it was $12. It fit exactly the angle i needed between the tank and the filler vent. No kinking because it was the perfect shape. One side seemed to be slightly smaller diameter than the other and I used that side on the tank. Slight touch of petroleum jelly, and it slipped right on both sides without removing the tank (again). Standard hose clamps both sides. I should have taken some pictures before I left the shop. I'll post some tomorrow.

Sac '68 sport · Mar 1, 2012

I just used fuel line from Napa. It's pretty stiff compared to what I've got from other places. My problem is actually on the other end where it goes up to the top of the filler neck. I can't get the stupid thing on without it either kinking at the top or sticking out in the wheel well. I think I'm just going to use a filter up at the top and zip tie it to the filler up near the top.

Jeff76 · Mar 2, 2012

Jeff76 said:
You are correct, its a PCV replacement. I found it on the shelf at Autozone, and it was $12. It fit exactly the angle i needed between the tank and the filler vent. No kinking because it was the perfect shape. One side seemed to be slightly smaller diameter than the other and I used that side on the tank. Slight touch of petroleum jelly, and it slipped right on both sides without removing the tank (again). Standard hose clamps both sides. I should have taken some pictures before I left the shop. I'll post some tomorrow.

Here's a pic of the PCV hose installed as the aux vent hose. That loose vent hose in the way of the clear shot is from the rear tank. Should have moved it before I took the pic. Sorry.

Jeff76 · Mar 2, 2012

Sac '68 sport said:
I just used fuel line from Napa. It's pretty stiff compared to what I've got from other places. My problem is actually on the other end where it goes up to the top of the filler neck. I can't get the stupid thing on without it either kinking at the top or sticking out in the wheel well. I think I'm just going to use a filter up at the top and zip tie it to the filler up near the top.

That's the problem I was having with standard fuel line. It would kink trying to get it to be malleable enough to make the 90 degree turn necessary to connect to the filler vent. That's why I was looking for alternatives.

BronCowie · Mar 4, 2012

Just installed a new aux tank and filler tube. The vent tube is kicked out a bit so the hose bend is only ~30* so no kinking issues here.

Auxiliary tank filler vent hose

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