RDS Fuel Tank and Diesel Install Kit Part 2 of 2

2016 Ram 3500HD RDS 71791 Tank and 011408 Diesel Install Kit

[@kendallsloan3741]

Update.... 3000 miles now. Several fill ups. On this tank I made a fuel measure stick. 24" wooden dowel. Marked 17.5" which is 95% capacity of 86 gallons. No leaks, no drips, no overflow from cap or vent. This thing is amazing. Gives me 800+ miles of severely loaded range....

[@billcudd7844]

Use a grommet where the fuel line runs thru the bed of the truck. Over time a hole will rub thru the line without a rubber grommet.

[@crepitus3552]

great video and thanks for sharing! looking at getting the 95 gallon RDS with the tool box this week and now I'm doing the research on install.

[@55afishead]

Nice job! you have the best install video on KZbin! Thank you!

[@kendallsloan3741]

Thank you. I'm not savy with technology and would have been better to film the actual installation, but video references most diy could pull it off

[@Rudedogg119]

Pretty straight forward video thanks for the help I'm doing the same to my ram 3500 nice and neat...

[@kendallsloan3741]

Typically I leave my valve open all the time when I'm towing. However when I forget, I did a few times drove the truck for few hundred miles, i turn the valve open and it will take several hundred miles to get to 3/4.. It never gets to the full mark until I pull off for some food or something shut truck down then it registers full. I've pulled in colorado mountains half fuel in main tank and aux tank valve open it still keeps up filling fast enough. Like u said it's a slow trickle but its still enough flow.

[@PPGDV]

Thanks for the video. Got a 14 3500 that I'm looking at doing this on. Fuel filter, you have two. One in the engine area and that body one that's in the video.

[@mikeanjor9079]

Thank you for this video

[@markyeater2247]

I just took the filler neck off altogether where the fuel door is there’s a rubber piece that you remove and there’s three 8mm bolts in there

[@alw6043]

These trucks have two fuel filters, one that you mentioned and the other under the hood.

[@kyleplouhar5012]

Nice video will a tounel cover fit over the tank

[@Abnmarine1970]

My RDS valve is installed just like yours. It's level with the brass valve at the 12 o'clock position. My tank only came with two 2" holes. I use a vented cap on the driver side and until today, plugged the other side. I just now placed a vent on that side and an hour later, it isn't leaking. I do however hope the second vent isn't causing the tank not to drain but I don't see why it would.

[@kendallsloan3741]

Without seeing your tanks setup and how you ran everything it's hard to say. . My rds tank has one rollover ball brass vent the other holes have gaskets and metal plates and obviously the filler cap.

[@kensmith7821]

Traded in my 07 Ram 2500 for a 17 Ram 2500. Need to install my RDS tank in my 2017. Question concerning the 011408 install kit. Did it come with the 2 pieces of extra hose for use on the filler pipe? I seen pictures of the kit where does not show the extra hoses. Thanks....

[@kensmith7821]

Did your 011408 kit come with the 2 the pieces of hose?

[@kendallsloan3741]

Update... Tank has been at 80 gallons of fuel bypass valve opened with no leaks. Some inquire about pressure feeding back up the filler neck and out the fill hole. After inspection it seems there are in fact 2 flaps the must be open simultaneously to fill the main tank. So I assume the two flaps seal tightly enough to prevent overflow. I however did however take extra precautions and added a aluminum fuel cap with an O ring...

[@johnnybobby862]

Kendall where did you get the cap to put on the filler neck. Mines is not holding pressure and is coming out?

[@Abnmarine1970]

Yes it leaks from the stock fuel fill flaps. I spoke to my dealership and they said a few trucks had a leak so they replaced the tube assembly. They aren't concerned about the RDS kit since it doesn't leak from there. I just installed a 90 degree vent elbow on the transfer tank, opposite of the fill cap. So for it appears to of stopped the leak but I need more time to know for sure. If it cures it, my guess is the vent cap on the transfer tank wasn't venting well enough, possibly causing the vent to pull through the flaps?

[@kendallsloan3741]

I think they might be right and you might have a faulty filler neck. when I installed my and I made sure to be at the lowest point from the RDS supply line as flat as I could on the filler neck so I cut into the metal. I have read and listen to people tell stories about with the valve open on the RDS tank if you accidentally open both flaps on the filler neck the air pressure is released and the fuel starts to literally spill out of there. the two flaps inside the filler neck should give it enough pressure that both air and or diesel fuel should not be able to escape

[@kendallsloan3741]

I wanted to tell you I bought a aluminum gas cap with a gasket that might be why I don't have issues. It fits inside really snug so maybe it seals pressure enough I don't have a leak... Check them out online.

[@thomasgonzales8149]

What size is filler hose kit I need for 2015 dodge Cummins

[@garydevore3330]

Why I ask it mine just decided to overflow one day now it won’t drain. So not sure if vent tube filter is clogged now

[@vtankdog]

Did you remove the the whole filler hose before cutting it or did you do while it was under the truck? I was just wondering about the metal shavings?

[@wevdog]

yea...my thoughts as well...I would never do the cutting while its on the truck like that. I guess you replace a diesel fuel filter often so not that big of a deal really.

[@twsinc7662]

Appreciate it your quick response. So while your towing you leave the valve in the on position. Should you turn it off when the truck isn't being used or does it not matter? I'm also installing in a Ram 3500 2017 model. Does it mess with the trucks mpg reading? I've talked with some guys and they said there truck will throw an error code having to do with fuel sensor.

[@kendallsloan3741]

I leave my valve open all the time, except if it will sit for days. I have forgot to close the valve and left it for over a week with no issues but I don't make a habit out of it... Everything I read from forums before installing this tank was that Dodge trucks don't throw codes for fuel... And I haven't ever thrown a code before... With both tanks full u will travel 700+ miles before you need the main tank... I have 7800 miles on the truck now. Never had a single leak or dash light.

[@juanbelinasalcedo7390]

Great video thanks for sharing. Whats size bolts did you use and where did you get the springs at.

[@kendallsloan3741]

They both came with the tank from RDS along with the hose, valve, and locking cap

[@Tony-rs1cv]

Thanks for the video I always run with my valve open on my RDS tank constantly supplying my little tank with fuel. I extended the black vent that is on side the factory filler neck up above my RTS tank but then I just found yesterday that my little tank is spitting fuel from on top of the little tank under the truck is there another vent there? Why is it spitting fuel there? Thanks

[@kendallsloan3741]

That's a great question. I was reluctant to change any oem vents and so far after 2½ years I have zero burping or spitting from either the factory tank vent or the rds vent

[@gregmenniges5963]

Over filling causes them to overflow when it gets hot.

[@Tony-rs1cv]

@@gregmenniges5963 Every since I quit trying to top off my tank no leaking whatsoever

[@twsinc7662]

Great video. I use my truck pulling a 40' trailer on a daily basis. Will the gravity feed system in the RDS tanks feed enough diesel to keep up with the demand? I like the price point of the RDS tanks but wonder if I would be better off with a different brand that already has the electric pump installed. Thanks for your opinion.

[@kendallsloan3741]

Oh yeah it will keep up.... I pull a 40' Tripple axle toy hauler. I have forgot to turn the tank valve on while towing. So I just drive u til I need to pee ya know. Then open the valve. If ur pulling u won't see the gas guage move much if at all.. It will maintain the main tank level. I pull in colorado mountains and have had no problems it keeping up... U should definitely install it with confidence....

[@bryanp3973]

TWSINC what did you end up going with? Curious before i make my purchase! Thanks

[@twsinc7662]

bryan 72549, great tank that has a small tool box on top.

[@Abnmarine1970]

I installed my RDS tank exactly like you did on my 2016 2500. Great video BTW. After a couple of months use, I not have fuel leaking from the two flaps in the fill neck and also the vent filter. I'm going to raise the filter in hopes of fixing this. I'm wondering if you have had this happen after using it for awhile now?

[@kendallsloan3741]

I have put 6000 miles on it now I leave the valve open when I'm driving it. I check often to see if there are any small leaks or spitting anywhere. All the hoses, fittings vents and surfaces are Clean of diesel. The only place I have the slightest residue is brass seal plate on the top of the rds tank.

[@kendallsloan3741]

I'm confused. You do have leaking or you do not??

[@larryblank6328]

Do you any idea how long.it takes to fill your tank? I did the same thing to thw same truck and fuel is coming out of the tank and I can hear it trickle like you said but after about 20 mins truck still said 3/4?

[@Darkwardrums77]

I read somewhere that it flows at a rate of about 8 Gallons per hour..

[@RightChange1]

Do you, or can you leave the valve that goes to the main tank open?

[@kendallsloan3741]

The valve stays closed unless I'm towing, ie.. the truck sits and/or trips are short (250mi or less). I open the valve only to replenish fuel in the main tank or during long trips towing.

[@miked5563]

my vent next to fill cap on gravity tank is spitting out diesel when driving on road. any tips?

[@kendallsloan3741]

Too full? I made a wooden stick that marks the % full it recommended so that it won't slosh around and spew out. I've never ever had fuel spit out.

[@Darkwardrums77]

It says in the RDS instructions that you're supposed to locate the vent for your factory tank and extend it up to and above the level of the RDS tank so that that won't happen.

[@marcuscarter5995]

Whats the model number on the kit you used with the tee and hose?

[@kendallsloan3741]

Rds diesel kit for dodge.

[@keithj6251]

Can I install this tank on a 2017 3500 Poo Promaster that runs on gasoline?

[@91156]

DOT certified for diesel only.

[@ryanhavellana9030]

I had an RDS tank on my 2016 ram 1500 before and called the company and they said yes u can run it with gasoline. I used a 12v pump wired to my gab, I wanted to run a gravity feed but was told that it’s illegal for gas so I just got a pump and it worked great

[@argotrucking6979]

How many inches did you cut off metal filler neck or rubber ? Or did you have to cut any off ?

[@kendallsloan3741]

Not really sure on that, what I did do is make sure the the aluminum tee fuel inlet was as level as possible and that I was far away fron any bends in the original fuel filler neck so all the clamps wouldn't be bound up in a bend. I used a cut off wheel and the a flex magnet to gather metal shavings, all these years still no drips or overflows. 24000 now

[@argotrucking6979]

@@kendallsloan3741so you did have to cut off some to fit the "T" in between the rubber and metal ? Does the T slide into the metal filler side or is it supposed to be flush

[@kendallsloan3741]

The rds kit comes with two fuel grade connections and 4 hose clamps, yes you will need to remove enough oem filler neck to insert the aluminum tee, don't make it a tight fit as you need room to slide each connector on so that it can then slip over the tee and you have enough oem filler neck pipe to make a secure tight connection.

[@argotrucking6979]

@@kendallsloan3741 ok thank you

[@teddygardner3282]

Hello what drill bit did you use and also what spring and washers did you use ?

[@kendallsloan3741]

I used a cheap metal step bits from harbor freight to drill the holes. The spring kit came from rds themselves when I ordered the tank. They are good about sending parts if you give them a call I bet they get u what you need

[@teddygardner3282]

Okay thanks

[@garydevore3330]

Did it ever over flow on you?

[@kendallsloan3741]

Never ever no..... I do use the billet cap behind the fuel door. But even then it's never pushed up. And never come from tank vent either

[@Abnmarine1970]

I can email you a couple pictures if you want. The elbow vent doesn't have a check valve. That could be an issue.

[@kendallsloan3741]

I think the check valve is actually inside the brass vent on the tank so that in a roll over fuel will stay inside.

[@electrician-bn7gr]

He put metal shavings in his fuel tank lmfao