Leaky fuel tank - advice? - Defender Source
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  #1  
Old May 17th, 2015, 02:24 PM
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Leaky fuel tank - advice?

Woke up to a wet spot in the driveway. Fuel dripping off the tank. I hadn't driven in a few days so I thought this was odd.

Before I make things worse, for those of you that have encountered this, what is the proper course of action?Click image for larger version

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  #2  
Old May 17th, 2015, 02:39 PM
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David Frank
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Well, at least no one tried to steal fuel although a puncture would be easier to find. Have you found it? Steel tank on the ex-mods, right? If you can't find it, you might be able to pressurize the tank in place by plugging the relief valve. Otherwise, I'd drain it, drop it and pressure test it to find the leak. As a semi-permanent and cheap band-aid, my mech used metal epoxy on a fuel theft puncture for a friend that didn't want to replace the tank and it worked like a charm. But this could be a great excuse to install a clean new plastic one and a nice skid plate cradle.
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Old May 17th, 2015, 05:07 PM
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That metal epoxy held?
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  #4  
Old May 17th, 2015, 07:00 PM
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Quote:
Originally Posted by rankar View Post
That metal epoxy held?
To this day.
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  #5  
Old May 17th, 2015, 08:16 PM
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Or you can get some PRC and patch the thing forever. We use that to seal wet wings (wings inside as a fuel cell). It resist almost everything from gas, fuel and oil. It's the same method as JB Weld. Two part but I recommend weighting the parts if it's PRC.
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Old May 20th, 2015, 12:11 AM
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What's PRC?
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Old May 20th, 2015, 12:44 AM
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Mine was leaking. Turned out it severely rusted between skid plate and tank. Beyond repair. New large capacity tank solved the problem.
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Old May 20th, 2015, 01:17 AM
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http://www.vansairforce.net/articles/tank_sealant.pdf

------ Follow up post added May 20th, 2015 01:17 AM ------

Gives you an ideal.
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  #9  
Old May 20th, 2015, 11:22 AM
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Thanks CDNRover I'll probably go that route. Looking up tank prices had me imagining, in horror, all my planned projects/upgrades going away.
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Old May 20th, 2015, 12:09 PM
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Did you find the leak?
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  #11  
Old May 20th, 2015, 02:12 PM
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Its been a busy week so I haven't pulled the tank yet. I crawled around underneath and it appears to be coming from the top forward of the tank...the one spot I can't see or reach. From there it leaks out to the bottom forward corners.
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Old May 20th, 2015, 03:07 PM
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After you drop the tank down, you'll be able to see the leak and if it's worth fixing.
I typically replace a leaking tank with a new one.
The process I follow is to drain the tank, drop it as close to empty as I can get it.
Then fill it again when out if needed to further examine the leak.
Typically, there is no need to refill the tank because it ends up on the scrap metal pile when a new one goes in.
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Old May 20th, 2015, 03:29 PM
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Tanks are like $300 new, right?
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Old May 20th, 2015, 04:06 PM
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Metal tanks are.
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  #15  
Old May 21st, 2015, 12:04 AM
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Plastic is really expensive? Take for account that they should last longer then the car!
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Old May 21st, 2015, 12:25 AM
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The prices I saw were significantly more expensive, $1000+. I'm still trying to figure out why
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Old May 21st, 2015, 12:34 AM
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If you were going to replace it, I imagine that you could drop it, use it as a template, and have a superior one fabbed up (using alloy) for less than $1k!
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  #18  
Old May 21st, 2015, 06:54 AM
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1k is what the dealer ask for a metal fuel tank on my 110. Bought it from Trevor for a 1/4 of that price! That means I can afford to swap it 4 times before even being square!

Have one fab at that price! You can even have a heated one for wvo for that kinda dough..
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  #19  
Old May 21st, 2015, 02:18 PM
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Yeah the plastic ones were too expensive and you're right I could get it gold plated at that price. I'm going to pull the tank this weekend. My fingers are crossed for a simple repair. I really want to spend that money on a canvas
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  #20  
Old May 21st, 2015, 02:46 PM
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Is your plastic tank similar to a Disco or RR classic enough to substitute?
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UD: "Just Power through it man!"
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