I have a 2003 Chrysler Town & Country 3.8L with a punctured (plastic) fuel tank. I cannot find a replacement fuel tank.
~4 months ago I used a repair kit. I cleaned the tank, used coarse sandpaper on the punctured spot, and then applied epoxy, fiberglass cloth, and more epoxy to seal the leak. The puncture is 3mm-5mm (1/8th inch) in width. Today, it failed and has begun leaking again.
I'm going to sand down the failed section, apply some "putty" (for fuel tanks) and then use another epoxy/fiberglass kit. That should at least work in the short-term.
What are my options for a permanent solution? Is there something more complex I could have a vehicle mechanic perform? Are there replacement solutions I don't know about?