HELP! I need new fuel filler necks

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HELP! I need new fuel filler necks

86-350-460-dually
This post was updated on .
IMG_20181214_132953.jpg

Anyways, the issue I am having here is my rear tank leaks from the filler neck when I pump gas. So much so, that I lose more than it's worth to use that rear tank.

My forward tank is the only operable one, but when the tank is full, it leaks out of the filler neck, slightly. I also have to spend about 10 minutes filling up that 18-19 gal tank because I have to fill it up so slowly.

I'm looking for solutions to being able to fill it up faster, but also part numbers or places that you can buy these necks. I have literally found ZERO companies than will sell me a filler neck for this truck, because it's a dually.

Any and all advice would be great! How did you fix this issue?  I will see if I can get some photos of what is on there currently, but I can't be too sure those are original either.
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

85lebaront2
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If you still had the bed and rear fenders I could give you a suggestion, but since those are gone I have no idea what filler necks and system you have.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: HELP! I need new fuel filler necks

86-350-460-dually
I believe the truck was a Cab & Chassis originally.
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

Rembrant
86-350-460-dually wrote
I believe the truck was a Cab & Chassis originally.
Yeah, I think it was Lebaront2 that told me, if it's a 4x4 Dually, then no, it never did have a bed on it. It was a cab and chassis truck from day one. 4x4's had beds, and duallies had beds, but 4x4 duallies did not have beds.

1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995

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Re: HELP! I need new fuel filler necks

86-350-460-dually
Yes, it was a 4x4 from day one. I paid for the vin report and it was referred to as a "custom cab & chassis"
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

85lebaront2
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When you have a chance get me some pictures of the filler necks.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: HELP! I need new fuel filler necks

86-350-460-dually
IMG_20181221_130954.jpg

IMG_20181221_131006.jpg

The first two photos (above) are of the forward tank neck.

The next photo is the rear. I am not too positive, but it appears like they used regular rubber hose for some of those connections.IMG_20181221_131031.jpg
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

Gary Lewis
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You might get more help if they didn't have click on the links to see the pics:







Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: HELP! I need new fuel filler necks

86-350-460-dually
Thanks for that help Gary. I'm still trying to figure that part out haha.
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

Gary Lewis
Administrator
Welcome.  I find that making it as easy for people as possible gets the most help.

Is the problem the filler neck or the hose?  If the hose, you might consider marine fuel filler hose.  It is made for that purpose and if there's one with the right ID to fit the tubing to which it connects it might work.  Here's a search that returned several hits on marine fuel filler hose: https://www.google.com/search?q=marine+fuel+filler+hose&rlz=1C1CHBF_enUS772US772&oq=marine+fuel+filler&aqs=chrome.2.69i57j0l5.11750j0j7&sourceid=chrome&ie=UTF-8
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: HELP! I need new fuel filler necks

86-350-460-dually
I suppose I am unsure. It's the tubing from the ribbed hose, to the fill cap, where you fill 'er up. It leaks through those connections. Are those not the filler necks? Simply a new hose would do the trick?
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

Gary Lewis
Administrator
Go here: Fuel Systems/Fuel Filler Part #'s/Fuel Filler Pipes.  There you can see the illustrations, including for the chassis cab, and the associated part numbers and what the part is called.

I doubt that the tube is bad.  I'd bet that the connection between the hose and the tube is the problem.  And a new hose may fix it if taking it off and cleaning it won't.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: HELP! I need new fuel filler necks

86-350-460-dually
I will have to loosen those clamps, clean it up and see how that fits back together! Thanks!
Adam

1986 F-350, Dually 4WD, C/C with the 460/7.5L
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Re: HELP! I need new fuel filler necks

Gary Lewis
Administrator
Yes.  Check to see if the rubber is bad and if the tube is corroded.  Then you'll know what the problem is.
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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Re: HELP! I need new fuel filler necks

85lebaront2
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In reply to this post by 86-350-460-dually
Make sure you get ethanol resistant hose!
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413