Just throwing this problem out there because I'm sure someone probably has figured out a better way of doing this.
I have a 22 gallon con-ferr style aux tank in the rear of the FJ40 with the typical style of aftermarket filler neck that it comes with. Also have a pollack valve so I can draw from either one. The problem right now is the filler neck has to sit below than the wheel wells, which puts the cap only a few inches higher than the tank. Most of the time it's not a problem, but if I have a full tank and happen to be at an angle, or the gas starts expanding, fuel starts leaking out of the cap. I also have cutoff stock fuel filler door and neck which I was planning on installing for a more stock look, but I'm not sure if that would work any better since it would still be in the same location.
So I've been staring at the underside of the 40 trying to come up with alternatives.
1. Raise the filler neck to the level of the stock one by cutting in to the wheel wells. Don't really want to do this because it would interfere with storing stuff on top of the wheel wells.
2. Relocate the filler to the rear, which probably would have the same problem unless I cut into the wheel wells like above. But I'd be more inclined to have it intrude towards the rear of the tub than on the side.
3. Fabricate a split filler neck in the stock location . This is my ideal solution, but the problem is trying to figure out how to get the filler hose from inside the tub (at the filler neck) to outside the tub (at the tank). Can't think of a clean way of doing this, and I'm pretty sure I'd run into problems getting fuel to flow that far of a distance unless it's a straight shot.
4. Last idea is to eliminate the aux filler neck entirely. Thinking about running a 3 way valve from the stock pickup tube to a custom plug on the rear tank and gravity feeding it. Valve would be shutoff during normal operation to prevent a leak from draining all the fuel. Filling this way would be really slow through a 3/8 fuel line, but it's not a big deal for me, I'd fill the main tank and let it gravity feed while I'm driving, then fill again until the aux tank is full. Or i could use an electric fuel pump as a transfer pump to speed up the process, and that would give me a spare fuel pump in case the stock one dies. If I link the vent lines together, there wouldn't be a risk of overfilling as any overflow would just spill back into the stock filler tube.
any thoughts or better ideas? Found a pic of the current setup, even shows the fuel leakage.
I have a 22 gallon con-ferr style aux tank in the rear of the FJ40 with the typical style of aftermarket filler neck that it comes with. Also have a pollack valve so I can draw from either one. The problem right now is the filler neck has to sit below than the wheel wells, which puts the cap only a few inches higher than the tank. Most of the time it's not a problem, but if I have a full tank and happen to be at an angle, or the gas starts expanding, fuel starts leaking out of the cap. I also have cutoff stock fuel filler door and neck which I was planning on installing for a more stock look, but I'm not sure if that would work any better since it would still be in the same location.
So I've been staring at the underside of the 40 trying to come up with alternatives.
1. Raise the filler neck to the level of the stock one by cutting in to the wheel wells. Don't really want to do this because it would interfere with storing stuff on top of the wheel wells.
2. Relocate the filler to the rear, which probably would have the same problem unless I cut into the wheel wells like above. But I'd be more inclined to have it intrude towards the rear of the tub than on the side.
3. Fabricate a split filler neck in the stock location . This is my ideal solution, but the problem is trying to figure out how to get the filler hose from inside the tub (at the filler neck) to outside the tub (at the tank). Can't think of a clean way of doing this, and I'm pretty sure I'd run into problems getting fuel to flow that far of a distance unless it's a straight shot.
4. Last idea is to eliminate the aux filler neck entirely. Thinking about running a 3 way valve from the stock pickup tube to a custom plug on the rear tank and gravity feeding it. Valve would be shutoff during normal operation to prevent a leak from draining all the fuel. Filling this way would be really slow through a 3/8 fuel line, but it's not a big deal for me, I'd fill the main tank and let it gravity feed while I'm driving, then fill again until the aux tank is full. Or i could use an electric fuel pump as a transfer pump to speed up the process, and that would give me a spare fuel pump in case the stock one dies. If I link the vent lines together, there wouldn't be a risk of overfilling as any overflow would just spill back into the stock filler tube.
any thoughts or better ideas? Found a pic of the current setup, even shows the fuel leakage.
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. Typically I'll try not to fill the rear tank all the way to prevent this problem, but the other problem I forgot to mention in the original post is the low filler neck also causes problems when filling at the gas station. I have to hold the hose a just the right angle or it shuts off, and I can only fill at half speed, I believe it's because there's not enough downslope to get the fuel into the tank fast enough. So there's quite a few reason I'm not happy with the current setup. Since I had the tank out to re-line it and I'm doing some body work, now would be a good time to fix everything.
