I have traded off my 06 Ram cummins for a 2016. I have a tank in box with filtered line to main tank. I can leave the valve open and fill both tanks and there has been no leaking. Can I do same with this 2016??

I had my 91 gallon tank installed in my 2016 RAM. It's gravity fed into the filler tube. I've had no over flow so far. I had some overflow problems in my old 2008 F-350.

Same as post above. Valve gets left open all the time and no problems so far in the last seven or eight months I've had it.

So how does this work. Looks like these " drip"systems don't have any thing keeping the fuel back from over filling the factory tank. Fluid level in slip tank is higher than the fuel cap on the truck. Is it only the fuel cap on the truck keeping a spill from happening? It actually has a head pressure of fuel against it ?Or is there a check valve on the upstream side of the tee into the filler hose on the vehicle?

Sorry Grit. For taking so long to look here again. The fuel cap in the 06 does not leak with the head of fuel above it. I ran all fuel through slip tank so that it was pre filtered to the main. The main fills and air/fumes escape through a valve on it. When fluid reaches the top it must have a floating ball in the breather that prevents fuel leaking.

Thank you for explaining that. I know the OE fuel tank vents have a check valve on them for rollovers and such. So the gravity feed system puts that check valve and the fuel filler cap into active duty?While I believe it works obviously, Im not fond of parts so easily removed like a gas cap being the only thing keeping 90 gal of fuel from spilling.

2016 Ram 3500 auxiliary fuel tank plumbing?? | Good Sam Community

Vette_Racer
Explorer
Oct 16, 2017
ivbinconned wrote:
How did you cut into metal filler tube and prevent filings from getting into tank.
My installer pushed a rag down below where he cut and then pulled it out to catch any shavings.
ivbinconned
Explorer II
Dec 09, 2017
Well now on my second time with a head of fuel in auxiliary tank I have a leak.
First time it didn't.
I just pulled off the wheel and wheel well so as to ascertain where it's running from. It's leaking right from the top where that green plastic is.
It's as if the second flapper is not sealing and so it fills into the top wider compartment. The first flapper most be stopping it from coming out of the fill cap or else my dust cap is sealing it. Didn't pull it off.

The only place it's leaking from is high inside of the fender. So ??

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2016 Ram 3500 auxiliary fuel tank plumbing??

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