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Discussion Starter #1
I did not head the advice. I foolishly and impetuously installed my brandy new gas tank with a sump welded to it WITHOUT testing for leaks with water. Of course, it leaks where the sump is welded on to the tank. There is a tiny tiny tiny pinhole.

Now after draining the tank and removing it from the vehicle I have rinsed it out with water several times (please tell me that the EPA does not read this board :rolleyes: ).

My question is: how "clean" does a tank need to be to repair a weld? Is it sufficient to just drain it and rinse it several times?

Thanks
 

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I would think that would be ok.Just to be on the safe side rince it a couple more times and call it good.Its not gonna blow up.bm
 

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Discussion Starter #3
batman09 said:
I would think that would be ok.Just to be on the safe side rince it a couple more times and call it good.Its not gonna blow up.bm
That's about what I figured. Thanks!
 

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My dad welded my tank up a couple of times years ago. We washed it out several times with soap and water. If you are really worried he also welded several others by using a lawnmower. He ran the exaust into the tank and let it run for a while. He figured a gas tank full of exaust wouldn't explode.
 

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Do not underestimate the power of gasoline fumes in an enclosed area.

I had a friend who flushed a tank and tried welding and the explosion ripped open the tank and the heat of the blast burned him severely.

I even remember Smokey Yunick commenting about a tank that was flushed, sat for a long time and still exploded when heat was applied.

At work we have a tank flushing solution/station though I can't remember the name. They use a sniffer to detect hydrocarbon.

My advice is to take it to a good gas tank repair place and have them flush it properly.
 

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If it's just a tiny tiny pin hole like you say, you might consider getting it relined with a sealer. This is a common practice on older tanks that are rusted and spring a leak. Good Luck...
 
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