Fuel Tank Leak

[jse51599]

I have a late 99 that leaks fuel mainly after I fill up. I am assuming it's coming from the hoses that connect to the tank from the fill neck? Anybody else have this same problem? Fixes? Thanks in advance.

[jse51599]

Well I'm bumping this back up since I haven't had any ideas, although it hasn't gotten any worse til tonite. I just figured maybe it was a leak in the tank up high since it only leaked when I filled up then eventually stopped as I used more fuel. But, tonite as I was filling up, the pump stopped so I 'topped' it off. A guy on the other side of the pump asked if the fuel usually comes out from underneath when I top off, and of course I was thinking wtf, right? I looked underneath and the fuel was pouring off the tank like someone turned on a faucet. So now I'm back to thinking the filler neck is bad, or a loose clamp, or bad weld on the tank where the hose connects to the tank, I don't know. Any ideas on any common problems w/ these fuel tanks? Also, what size are the torx bed bolts? I have a T60 and it's too small. Thanks for any input, as we all know, diesel is too expensive to let spill everywhere.

[goodyFAB7.3]

its mot likely the filler neck, ive had rusty tanks in my fathers fleet on both 6.0 and 7.3 but none ever leaked, anytime weve had a leak it was the filler tube it rots/rusts out fairly quick up here...

btw my 00 f350 ext cab has a plastic tank, i think your does too!

[jse51599]

Originally Posted by goodyFAB7.3

its mot likely the filler neck, ive had rusty tanks in my fathers fleet on both 6.0 and 7.3 but none ever leaked, anytime weve had a leak it was the filler tube it rots/rusts out fairly quick up here...

btw my 00 f350 ext cab has a plastic tank, i think your does too!

Are you talking about the part where you put the nozzle in, or the part coming off the tank itself. I'm just guessing the filler tube is rubber? Do I sound confused? I might be.

[Zaairman]

You should have a plastic tank. And even if you have the right size torx bit, it probably won't work on your 10 year old bed bolts... Gonna need an angle grinder and a BFH.

Part of the filler tube is metal, and part of it is rubber.

[jesilvas]

Tanks are plastic. Probably the filler or vent tube. Check hose clamps. Also maybe clamps on top of tank where fuel is pulled by pump or returned if unused. Maybe. If you need to drop the tank, don't lift in the middle. The fuel pickup unit is there. Don't wanna mess it up.

[jse51599]

Originally Posted by Zaairman

You should have a plastic tank. And even if you have the right size torx bit, it probably won't work on your 10 year old bed bolts... Gonna need an angle grinder and a BFH.

Part of the filler tube is metal, and part of it is rubber.

Just checked w/ magnet, tank is plastic. I am hoping that it is as simple as a bad filler neck. Angle grinder: check, BFH: need to go to Lowe's. If I'm not mistaken, it'll be easier to pull the bed to get full access to the tank. I can unbolt the filler neck from the bed right?

[jse51599]

Originally Posted by jesilvas

Tanks are plastic. Probably the filler or vent tube. Check hose clamps. Also maybe clamps on top of tank where fuel is pulled by pump or returned if unused. Maybe. If you need to drop the tank, don't lift in the middle. The fuel pickup unit is there. Don't wanna mess it up.

Yeah, I'm not sure what to do. The tank is full, and the bed bolts are a pita to get out.

[jesilvas]

Yea you can take the bed off. Or just raise it some. But be careful of the wiring harnesses.

[goodyFAB7.3]

now youe got me thinking , you should be able to get the metal part out and replaced without takeing the bed off...ill check tomorrow but ive done it on many other trucks