Auxiliary fuel tank filler problem (1 Viewer)

[jhynesrockmtn]

My 77 has an auxiliary tank in the rear. It's almost impossible to fill it at the gas station. The curve in the hose is so severe and it's at an angle where the gas wants to come back out immediately. I took a few pictures of the connection between the filler and the tank. What have others done to better make this connection?

 

[charliemeyer007]

The easy solution is to make up a 3 layer block of 2x6. Say 6" on top of a 10" on top of a 14". Pull up to the pump, set break/shut up leave in gear - get out your block, stick it in front of or behind the rear tire on the side of the fill port. Pull forward or back up on top of block. It will now fill much easier.

When I first did my aux tank, I used my electric fuel pump to push gas from the main to the aux tank. PIA switching hose routing to fill. Could be done with several selector valves.

 

[B y r o n]

You want to eliminate as many bends as possible.

 

[Mark Jennings]

Mine also burps….I just fill slowly. I ended up making the filler neck shorter and welding up a 45 at the bottom before it enters the tank…..

 

[ferg]

You need a filler vent hose from the top of the tank up to the filler hole. Look at your main tank set up.

 

[peesalot]

There should be a vent hose from tank just up and behind where fill hose attaches that goes to a nipple just an inch or so on filler inside fender.

 

[Mark Jennings]

I think his vent hose is up behind his filler neck, you can see it if you zoom in, pretty caked with mud. Mine is behind the 2” hose and vents to the filler neck.

 

[Rocky_LC]

Mark has the correct solution…. Straighten your hose…. If you have to make metal bends…. So be it!

Rocky

 

[fireflyr]

I used some 2” aluminum intake pipe that’s for turbochargers and bought some gas filler hose with a 45 degree bend.

I ran mine out the back behind the spare and ran two vents; one to the filler and ran another up to the engine compartment with a home made carbon canister.

With the CA gas pumps it would shut down constantly before I ran that second vent. Now it can be filled in one shot.

 

[clrussell]

I used some 2” aluminum intake pipe that’s for turbochargers and bought some gas filler hose with a 45 degree bend.View attachment 3782695
I ran mine out the back behind the spare and ran two vents; one to the filler and ran another up to the engine compartment with a home made carbon canister. View attachment 3782694
With the CA gas pumps it would shut down constantly before I ran that second vent. Now it can be filled in one shot.

I like that it is hidden as well.
Nice job

 

[jhynesrockmtn]

I used some 2” aluminum intake pipe that’s for turbochargers and bought some gas filler hose with a 45 degree bend.View attachment 3782695
I ran mine out the back behind the spare and ran two vents; one to the filler and ran another up to the engine compartment with a home made carbon canister. View attachment 3782694
With the CA gas pumps it would shut down constantly before I ran that second vent. Now it can be filled in one shot.

Super clean install. OK, some great ideas here, thanks for the help.

 

[peesalot]

Taking that rib and folding or cutting it out makes it much nicer IMO. I did that as well. I used a SS boat filler that had a 30* angle, 2" nipple, drilled/tapped a nipple for vent just inside fender, and a piece of fuel hose 2" which was a pretty penny at napa. I have found that if you put 19 + gallons the sender likes to leak so I just stop at 18, I should drop tank & fix.

 

[Downey]

Evidently I will not be making more rear fuel cells in the future, can't find a Roto Molder willing to use my heavy steel mold, Sooooo I then have several filler neck panels like that shown in post #9 above, 6 bolts into the body, can sell, lemme know ???

 

[clrussell]

Evidently I will not be making more rear fuel cells in the future, can't find a Roto Molder willing to use my heavy steel mold, Sooooo I then have several filler neck panels like that shown in post #9 above, 6 bolts into the body, can sell, lemme know ???

I’ll be in touch soon. I would like one for my
Future aux tank.

 

[jhynesrockmtn]

So I dug into this in more detail over the last few days. It turns out the vent for the tank was capped off. The filler hose between the inlet and the tank was also kind of a mess. I redid everything, hopefully it will make it a lot better.

 

[V8FJ4078]

See pictures of mine...

I bought a curved hose to connect and the vent line was hooked up to the tank as well.

 

[ducktapeguy]

Fixing the vent will help a lot, as will making the run as straight as possible with fewer bends. But I always had trouble filling my aux tank because there isn't enough angle from the filler to the tank to allow the fuel to flow fast enough, so I always filled at half speed so gas wouldn't come spitting back out.

I eliminated the filler hose completely and ran a line from the main tank to the aux tank with an electric fuel pump. The main reason was because i didn't like the filler hose connection so close to the tire in case of a blowout.

 

[charliemeyer007]

On some rigs I have carried a block of three 2"x6" screw together to make a ramp for the rear tire on the inlet side. Pull up to the pump, place ramp, drive on ramp, shut off rig, fuel up tank is easy and quick because its now down hill. Pay, drive off ramp, put ramp back in rig.

I have used the electric fuel pump to move gas from main to the aux that didn't have a regular filler. Moving hoses on the selector valves is a PIA if they aren't handy. You can hear when the tank is full by the lack of pump clicking or its starts peeing out the vent.

 

[clrussell]

On some rigs I have carried a block of three 2"x6" screw together to make a ramp for the rear tire on the inlet side. Pull up to the pump, place ramp, drive on ramp, shut off rig, fuel up tank is easy and quick because its now down hill. Pay, drive off ramp, put ramp back in rig.

I have used the electric fuel pump to move gas from main to the aux that didn't have a regular filler. Moving hoses on the selector valves is a PIA if they aren't handy. You can hear when the tank is full by the lack of pump clicking or its starts peeing out the vent.

this^^

 

[jhynesrockmtn]

I can confirm that the changes I made improved things quite a bit. I was able to put several gallons in about half speed on the pump. Good enough.