This is old hat to a lot of you guys. . .
I had a pinhole leak in the gas tank. It kept the bottom of the tank wet, and pooled on the engine overnight. I got tired of fooling with it and figured I'd try that pour-in liner stuff. I rigged a pressure tester (long story) and found 7 pinholes - three around the outlet fitting and four on top. I lashed the tank to a concrete mixer, put in a pound of nuts and some caustic pressure washer cleaner and let it spin for a couple of hours. (It took the finish off of the nuts) Then spun it four more hours, using first Dawn dish soap and then clear water. A local radiator shop said he'd fool with it after telling him how I'd "cleaned" it. He swore that he was a cautious individual and would take no chances. I took it to him and he sniffed it, lit a torch, and stuck it over the filler neck before I could tell my legs to run. The darn thing didn't say a word. He had it soldered and I was pulling out of his driveway in less than an hour. It was a good experience for me - I was pretty well convinced that I couldn't safely clean a gas tank, but if I ever have another one develop a leak, I think I can fix it myself.
I'm not recommending this, but thought someone might find it interesting. It's a subject that comes up pretty often.
I had a pinhole leak in the gas tank. It kept the bottom of the tank wet, and pooled on the engine overnight. I got tired of fooling with it and figured I'd try that pour-in liner stuff. I rigged a pressure tester (long story) and found 7 pinholes - three around the outlet fitting and four on top. I lashed the tank to a concrete mixer, put in a pound of nuts and some caustic pressure washer cleaner and let it spin for a couple of hours. (It took the finish off of the nuts) Then spun it four more hours, using first Dawn dish soap and then clear water. A local radiator shop said he'd fool with it after telling him how I'd "cleaned" it. He swore that he was a cautious individual and would take no chances. I took it to him and he sniffed it, lit a torch, and stuck it over the filler neck before I could tell my legs to run. The darn thing didn't say a word. He had it soldered and I was pulling out of his driveway in less than an hour. It was a good experience for me - I was pretty well convinced that I couldn't safely clean a gas tank, but if I ever have another one develop a leak, I think I can fix it myself.
I'm not recommending this, but thought someone might find it interesting. It's a subject that comes up pretty often.