SC Gas Tank Leaking

Lieu · Apr 9, 2020

I restored my Dad's SC over 20 years ago. At the time, I put a tank lining kit in it and I haven't had any problems until the last couple of years. The tank is leaking and until I take it off, I can't tell exactly where but it appears to be where the manufacturer welded the threaded hole for the sediment bowl.

Any suggestions on how to fix this would be appreciated.

Thank you.

tomturkey · Apr 9, 2020

Are you sure it is not coming down the threads and migrating to the metal around the threadlet? Always some vibration at the sediment bulb assembly. Hope so for your sake. gobble

Lieu · Apr 9, 2020

That's what I thought, but a friend of mine who's an excellent mechanic said it's not coming out the threads.

flatpkr · Apr 9, 2020

Sounds like JB weld may fix this.
Jim

tractorguy2 · Apr 9, 2020

I have two SC's. Both leak where the threaded part is soldered to the tank. I bought a JBweld product called "water weld." It is a grey/whiteish putty that is resistant to gasoline and diesel. So far has been holding fine.

Lieu · Apr 10, 2020

Thanks for the advice. I will try some. I assume I would want to sand down to bare metal first?

Lee_K · Apr 10, 2020

I soldered one once but the tank had been sitting empty and open for more than a year. Ive also heard JB weld works, but may deteriorate over time.

Pastor John · Apr 10, 2020

I have had experiences with both of my SC and DC tanks leaking! In both situations it was a hairline crack radiating out from the area around the sediment bowl.
My suggestion is this:
a. Have it welded up by an experienced welding shop
b. Look for a replacement tank

I have done both of the above and have been very satisfied!

It will cost you $100.00 or more

This is must cheaper,less hassle,and a whole bunch safer!,

Ken Christopherson · Apr 11, 2020

MY SC tank leaked as well in about the identical spot. My friend and I did a combination of welding and soldering. I would NOT recommend doing this yourself unless you are a very experienced welder (which he is), and that you have taken the proper precautions to clean the fuel tank. First, we cleaned the tank inside with HOT water and Dawn dish soap (probably three wash cycles). Next, clean the surface to bare metal. Third, we drilled small holes on each end of the cracks to prevent spreading. Fourth - we welded the cracks and ground them smooth. Finally, we soldered over the welded to fill in and seal any potential pinhole leaks that may have been missed in the welding process. Last, file and sand it smooth, prime and paint. We have not had an issue since.

There are products out there designed to seal fuel tank leaks similar to JB Weld (I believe JB weld does have one)... BUT, normal JB Weld will NOT work. I tried on an MM ZTU tank and it didn't last a month before the fuel was causing it to bubble and peel.

Jim McVay · Apr 15, 2020

I hook steel flex pipe from a car exhaust into tank for several hours then braze it up. VERY DANGEROUS!!! But that is going to burn coating loose. I have a 351 and I cut a hole in the top and cleaned inside and painted and bolted a cover over hole in tank.

Greenfrog · Apr 28, 2020

Looks like tank from a DC.

munson1086 · Apr 29, 2020

I've had good luck JB welding where the leak is, and then coating the inside of the tank with a product called RedKote. I've used this on several tanks. Be sure to follow the instructions. My DC has been holding with this method since 2011. Also used on old three and four wheeler tanks as well.

Matt

SC Gas Tank Leaking

Lieu

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tomturkey

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Lieu

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flatpkr

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tractorguy2

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Lieu

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Lee_K

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Pastor John

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Ken Christopherson

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Jim McVay

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Greenfrog

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munson1086

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