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Fuel tank leak


Gonzalo
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Mine was leaking at the weld around the drain plug.  I pumped the diesel out into a 50 gallon barrel, pulled the tank, washed it out with soap and water and took it to a welder.  The soap and water (drain and fill several times) was to prevent any possibility of diesel catching fire from the welding.

A floor jack helped me get it out by myself. 

When the welding was complete, I filled with water and watched carefully for a leak.

Not actually a terrible job.  I was quoted $1,500 by a local shop to do it, which seemed like more than I wanted to spend on it.  I bought a drill powered pump, and a $50 gallon barrel.  Welding cost me $29 bucks.  It was a long time ago, but I'll bet I spent less than $100.  Total time invested, including sourcing barrel and driving to the welder, was about 6 hours.

If yours is leaking elsewhere, you may need more welding.

First thing is to get the tank out.  I'd fill it with water when up on blocks and look carefully for leaks.

Dwight

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3 hours ago, Doug Hoegh said:

Like Dwight, mine was also leaking at the drain plug bung.  We drained the tank and used a steady stream of shop air blowing through the fill neck welding in place. 

Even better than shop air would be to purge the tank with argon, nitrogen, CO2 or most any other inert gas.
Displace the oxygen and it can't ignite.

A while back I used my plasma cutter to cut the head off and cut vent holes around the bottom of a burn barrel.
It was one I'd used previously for diesel.  I just removed the bungs so the pressure could escape and started cutting.
The vapors ignited and it chuffed a few times, but nothing major. LOL

Edited by dl_racing427
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21 minutes ago, dl_racing427 said:

Even better than shop air would be to purge the tank with argon, nitrogen, CO2 or most any other inert gas.
Displace the oxygen and it can't ignite.

A while back I used my plasma cutter to cut the head off and cut vent holes around the bottom of a burn barrel.
It was one I'd used previously for diesel.  I just removed the bungs so the pressure could escape and started cutting.
The vapors ignited and it chuffed a few times, but nothing major. LOL

Totally agree.  We were careful not to let the weld get too hot, but Nitrogen would have been a whole lot safer.  50 years ago in the service we would throw our cigarette butts in the open diesel fuel bladders and think nothing of it.  Bit I was a whole lot younger and probably a bit crazy at the time.  

  • Haha 1
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