How to stop a minor fuel leak

Best way IMO is take it to an aluminum fab shop and get it welded. If the tank is properly cleaned out I can't see why they wouldn't weld it.

 

Yep, with tanks like that,we remove them, drain them, and send them out to fab shop for a patch piece to be welded on.

 

The OP probably figures by time you remove them,send it out then re-install..Might be cheaper to buy anew 1.

He just wants a quick patch (If possible)...........I know you can get a new 1 for bout $5-600

Not everyone's got a toasty warm shop to do stuff like this

 

I wish I had a nice warm shop to work in lol. The big issue is finding a product that will cure while diesel is trying to wash it away. Sealers and epoxies don't typically bond well with petroleum contamination. So regardless you will more than likely have to drain and clean the tank out anyways. What's an extra 15 minutes to unhook 2 tank straps, 2 fuel lines and an electrical plug?

 

lol, Oh Sure- Caked on Fuel Lines Always come right off without persuasion...Strap bolts Never Break upon removal- Try a Few hours With an older truck..

But ,It probably is the best way to Go- Save a Few Bucks anyway

 

Believe it or not a bar of soap works well for temporary repairs. I used that trick once in order to burn the fuel down to below where the damage on a tank was, and then patched it with good ole JB weld with the intent of replacing the tank when it was convenient. The JB weld repair was still holding when I sold the truck.

As NorthernMechanic suggested, if the leak is on a seam or hole in the bottom of the tank that cannot be dried up, then removal and repair/replacement is probably the best option.

 

I used a marine grade epoxy suitable for aluminum. My tank leaked in behind the straps, many pin holes. I used a Dremel to route out all the holes and white corrosion. Sanded it and cleaned it off with alcohol, I think.
Then applied the epoxy. After the strap was in place you couldn't tell that I did anything. I drove the truck for a year and a half after that and traded it off. No problems with it.

 

Paraffin wax and jb weld, spread the wax till it stops leaking and then jn weld it.

 

I have a former employer that patched a hole in the side of the block on series 60 with JB weld .
That was 2 years ago and it still runs lol.