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Fuel Tank Leak

R

Ricey06

Member
I have a problem and need help/options. I have a CIH 4240 open station
diesel. My saddle tank has a pin hole, maybe 1/16. I was having issues
with rust inside the tank. I replaced the filters a couple times and
used a magnet to try and clean out the inside. I removed the tank and
the paint where I saw the leaking. The metal on the outside under the
paint was clean( no rust, looked like a drill hole). I thought about JB
Weld but figured I'd ask for some advise from some of you with past
experience? What ever is recommended to fix the leak would be great.
Would you think I may need to line the tank also? I looked into a new
tank, $1400 and not available. Thank You Jeff
 
JB weld is your friend. i used that this spring . i even asked on here if there was something better. i got a reply to use seal all,... well that stuff is useless, left it a week then pealed it off with my finger nail and used jb and its still holding diesel .
 
I used a pointed metal screw on an air compressor tank about 25 years ago. JB weld over the screw. I rarely use the compressor anymore, but the screw idea worked for me.
 
JB weld makes a fuel tank sealer. Two part of course. I used it on a dump truck gas tank (40 gallon) many years ago and it was still holding when I junked the truck.
cvphoto154979.png
 
Thats what we used to do. Every vehicle with an underneath fuel tank
had a tube of Seals-All and 2-3 sheet metal screws with a leather gasket on them
in the jockey box. And a screwdriver to turn it in.
Put a glob of Seals-All on the leather gasket and screw it in. Worked great.
We had a 40 mile gravel road to town. If the road was fairly well packed, usually no problem
But if the road grader was just by, you could bet you were going to get rock puncture in the gas tank.
 
Same here, Wheat47. Seal-all on a screw has been the standard quick fix for pinholes in tanks for decades, and will often--very often--still be working at the end of the vehicle's useful life. I have not used JB Weld's tank repair, (though I've used standard JB Weld for many, many successful repairs over the years and view it as an excellent product within its limitations) so I can't comment on its effectiveness, but Seal-all has a long track record of working. You can also use screen mesh covered with Seal-all to give more strength over larger holes or cracks.
 
I just used the same thing on a 100 gallon transfer tank that had a pin hole in it. Worked good so far, My son used the same thing on his transfer tank a few years ago and its holding up so far. Seven bucks on Amazon, was a cheap easy fix.
 
Have you got a NAPA store close by? They developed a fuel tank repair kit in the 1960's. I've used quite a few of them over the years on gas tanks. Never had 1 fail. But I can't remember useing 1 on a diesel tank.
 
I had a stripped drain plug on a aluminum saddle tank. I used Jb weld to glue it back in. that was 15 or more years ago still holding. The area needs to be super clean, and maybe scuffed up a bit. Jb weld makes a fast setting also. Stan
 
A drill hole you say? Can it be tapped and a pipe plug put in? Would probably be more secure than any sort of epoxy if you do it flip it over upside down let most of the shavings out by gravity
 
If it is under a strap it probably has several places about to leak now. I would just cut out the piece and weld in a new piece or weld a patch over the place where the strap is on the tank. Cover more than just the strapped area by a bit so you know it is not going to leak after you fill it. Just weld it no need for the water and all that nonsense to it diesel fuel does not burn like gas does. I've welded several tanks with diesel fuel right in the tank with no problems. just once you start don't stop till you are done that is where the problem can come in the delay allows time for fuel to vaporize and then you have a problem.
 
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