Fuel Tank Filler Neck Rusted & Leaking - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 02-09-2010, 05:36 PM   #1 (permalink)
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Fuel Tank Filler Neck Rusted & Leaking

Has anyone had their fuel tank filler neck rust out? I have a 1999 F350 dually diesel 8 foot bed and need to know the part # of the filler neck and where I can purchase it for cheaper than the dealer cost.

The Ford parts counter guy wouldn't give me the full part number and only gave me a number of 9034.

My filler neck is rusted to the point it needs to be replaced and leaks a ton when the tank is at or near full making a mess.
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Old 02-09-2010, 05:52 PM   #2 (permalink)
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Isn't that neck a welded on part?
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Old 02-09-2010, 05:55 PM   #3 (permalink)
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Mine is rusting out but not leaking. Can you cut out the rotted section and maybe put a piece of hose in place. I priced a new one and it was like 160$.
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Old 02-09-2010, 06:00 PM   #4 (permalink)
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If you are talking about part 2 in the diagram the part number is 9034 and it is called a "Fuel tank filler pipe". According to my book.
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Fuel Tank Filler Neck Rusted & Leaking-fuel-tank-parts.gif  
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'03 Excursion, 7.3L, 4X4, Auto tranny of course (they all did), 4" MBRP exhaust, TS performance chip, K&N FIPK w/ an Amsoil EA filter, Hellwig anti-sway bar, drilled/slotted front & rear rotors. Rancho XL shocks, Rancho steering damper, Airlift 5000, S&S Diversified headlight mod. This baby surprises a lot of, so called, performance cars.
'04 F 350, extended cab, 6.0L, FX4, manual tranny, 4" MBRP exhaust, Bully Dog Triple Dog downloader w/ Outlook monitor (Very disappointed in the Bully Dog), 2m-70cm Yaesu ft-8500, S&S Diversified headlight mod.

'96 Mustang Cobra convertible, B&M short throw shifter, Koni adjustable shocks, viper chip, drilled/slotted rotors front and rear, rear sequential turn signals.

'11 Harley-Davidson Road King Classic 103 ci PowerPak w/ anti lock brakes & Smart Security system. It even has cruise control!!! Candy Dark Root Beer over Candy Light Root Beer
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Old 02-09-2010, 07:26 PM   #5 (permalink)
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Quote:
Originally Posted by mm8f350 View Post
Has anyone had their fuel tank filler neck rust out? I have a 1999 F350 dually diesel 8 foot bed and need to know the part # of the filler neck and where I can purchase it for cheaper than the dealer cost.

The Ford parts counter guy wouldn't give me the full part number and only gave me a number of 9034.

My filler neck is rusted to the point it needs to be replaced and leaks a ton when the tank is at or near full making a mess.
I think your only choices are going to be the dealer or a wrecking yard. The other option is to pull it off, find some exhaust tubing of the right size and repair it by welding the new tubing on. That last would only work if it's not rusted at the flange where it fastens to the bed.
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Old 02-09-2010, 07:30 PM   #6 (permalink)
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I think your only choices are going to be the dealer or a wrecking yard. The other option is to pull it off, find some exhaust tubing of the right size and repair it by welding the new tubing on. That last would only work if it's not rusted at the flange where it fastens to the bed.
And fill it with water first to make sure all of the fumes are out of the tank. (BOOM!!)
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'04 F 350, extended cab, 6.0L, FX4, manual tranny, 4" MBRP exhaust, Bully Dog Triple Dog downloader w/ Outlook monitor (Very disappointed in the Bully Dog), 2m-70cm Yaesu ft-8500, S&S Diversified headlight mod.

'96 Mustang Cobra convertible, B&M short throw shifter, Koni adjustable shocks, viper chip, drilled/slotted rotors front and rear, rear sequential turn signals.

'11 Harley-Davidson Road King Classic 103 ci PowerPak w/ anti lock brakes & Smart Security system. It even has cruise control!!! Candy Dark Root Beer over Candy Light Root Beer
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Old 02-09-2010, 08:41 PM   #7 (permalink)
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And fill it with water first to make sure all of the fumes are out of the tank. (BOOM!!)

And just how are you going to weld on water??? And what is water made of???? Hydrogen and Oxygen!!!! when it gets hot it breaks down and becomes 2 very bad things.

Take it to a welding shop that know what they are doing. A good welding shop will "DE-GAS" your fuel tank and make it safe so they can weld on it. We have welded 4 GAS tanks this week and 1 diesel tank. If done correctly you will not have to chase water out of your fuel tank and have the chance of it getting into your fuel system. Attached are pics from a fuel truck we put a manifold on....and what happens when you "think it is ok" and are not 100% sure. If my father was not wearing great eye protection he would have lost his eyes. He had all ready welded on the tank once and the customer took it and brought it back....It just needed one small tack and that is all it took. It needed to be de-gassed a second time. One very painful lesson to be learned.



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Old 02-09-2010, 08:48 PM   #8 (permalink)
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You fill it with water to evacuate all of the fumes and then empty the water out. Or, the water would never allow the metal to get hot enough to weld.

Though a welding shop would be the safer way to go. I just wanted to make sure someone didn't weld on a fuel tank without considering the fumes.
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'04 F 350, extended cab, 6.0L, FX4, manual tranny, 4" MBRP exhaust, Bully Dog Triple Dog downloader w/ Outlook monitor (Very disappointed in the Bully Dog), 2m-70cm Yaesu ft-8500, S&S Diversified headlight mod.

'96 Mustang Cobra convertible, B&M short throw shifter, Koni adjustable shocks, viper chip, drilled/slotted rotors front and rear, rear sequential turn signals.

'11 Harley-Davidson Road King Classic 103 ci PowerPak w/ anti lock brakes & Smart Security system. It even has cruise control!!! Candy Dark Root Beer over Candy Light Root Beer

Last edited by Matt0987; 02-09-2010 at 08:51 PM.
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Old 02-09-2010, 09:17 PM   #9 (permalink)
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I have also seen a tank welded on after being filled with water and drained....It still went KABOOM and flew across the shop floor.

My filler neck is doing the same thing, but only if I get it very, very, very full.... Fuel starts gushing out behind the bed...scary stuff.
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Old 02-09-2010, 09:26 PM   #10 (permalink)
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I'm glad this was brought up because mine is rusted like a big dog.
Not exactly sure what to replace it with?
Is there a rubber after market fix?
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Old 02-09-2010, 09:43 PM   #11 (permalink)
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I'm glad this was brought up because mine is rusted like a big dog.
Not exactly sure what to replace it with?
Is there a rubber after market fix?
I would suggest that you replace the rusted parts with new. If the tank is rusted then buy a new one. You don't want rust flaking off and cloging up your fuel filter. Similarly, the 9034 part.
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'04 F 350, extended cab, 6.0L, FX4, manual tranny, 4" MBRP exhaust, Bully Dog Triple Dog downloader w/ Outlook monitor (Very disappointed in the Bully Dog), 2m-70cm Yaesu ft-8500, S&S Diversified headlight mod.

'96 Mustang Cobra convertible, B&M short throw shifter, Koni adjustable shocks, viper chip, drilled/slotted rotors front and rear, rear sequential turn signals.

'11 Harley-Davidson Road King Classic 103 ci PowerPak w/ anti lock brakes & Smart Security system. It even has cruise control!!! Candy Dark Root Beer over Candy Light Root Beer
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Old 02-09-2010, 11:29 PM   #12 (permalink)
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I need to call powerstrokeshop tomorrow as I think I have found what I'm looking for, but I need to confirm that it's part # 9034. MSRP is $169.79, but they sell it for $100.55.

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Old 02-10-2010, 07:53 AM   #13 (permalink)
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I would think you could slather on some rust converter and find some rubber tubing to cover the old section... A few hose clamps... oughta work.
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Old 02-10-2010, 02:09 PM   #14 (permalink)
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And fill it with water first to make sure all of the fumes are out of the tank. (BOOM!!)
The welding repair is getting done on the filer neck AFTER it is removed. Even if there were a few drops of fuel inside the neck both ends are open and vented.
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Old 02-10-2010, 04:46 PM   #15 (permalink)
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And just how are you going to weld on water??? And what is water made of???? Hydrogen and Oxygen!!!! when it gets hot it breaks down and becomes 2 very bad things.
Ummm - when water gets hot it turns into steam. You could separate the hydrogen and oxygen with electrolysis, but you would have to capture the gas and recombine them before you set off a "bad thing"

Do you honestly think they would use water to cool nuclear (that's nu-ku-lur for those who remember Jimmy Carter) reactors if it went boom everytime it got heated up?
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