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1994.5 - 1997 7.3L Power Stroke Diesel  

fuel leak

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Old Apr 9, 2015 | 05:48 PM
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fuel leak

So I bought this truck recently but there's a problem that it leaks fuel from both tank lines at the very top of them just after the fuel doors.

The first picture shows where it's leaking, right at that band clamp. And the disconnected hose in the second picture I have no idea what it is supposed to be hooked up to. Or maybe it's not important? I've been driving it with no trouble so far


 
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Old Apr 9, 2015 | 05:50 PM
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Shoulda mentioned also that the disconnected hose is on the rear differential
 
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Old Apr 9, 2015 | 05:51 PM
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That second pic is a vent line off the rear end. Just put it up along the framerail, after making sure it isn't plugged.


You're gonna have to pull the fill lines off and either fix or replace them is about all i can really say about the first one.
 
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Old Apr 9, 2015 | 06:10 PM
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At the price of diesel, I wouldn't put off that repair for too long...lol
 
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Old Apr 9, 2015 | 06:16 PM
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Yea no kidding it's killing my millage right now lol
 
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Old Apr 9, 2015 | 06:21 PM
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And your wallet is getting lighter all the time I'll bet...lol
 
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Old Apr 9, 2015 | 06:52 PM
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You got that right
 
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Old Apr 9, 2015 | 08:00 PM
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I bet you'll find rust pin-holes behind that clamp. Happened with two of my filler pipes. Metal on metal.... I don't weld, so I took it to my buddy down the street who does. He suggested I try some epoxy type sealer/filler. I found some of this stuff - PC Epoxy - at Ace Hardware. Just got the little size, two little plastic cans (if you ever did 35mm photography, I swear they're using all the old Kodak film cans).

The components are a thick pasty consistency, similar to spackling clay, one gray one black. You know you've got 'em completely mixed when the result is dark gray with no streaks/swirls. Spreads on with a wooden stick. I cleaned up all the rust, slathered this stuff over the pin-holes, let it dry, then I put a piece of bicycle innertube around the pipe where the clamp goes around it, so it's no longer metal on metal. They've been bone dry ever since.

I saw one fella put a little chainsaw fuel filter on the end of that axle vent hose. Whatever you do, don't let it get clogged.
 
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