I have a pinhole leak on the very bottom of my plastic fuel tank in my car and I'm trying to repair it. If the tank was empty, the hole could be plugged with some epoxy, JB weld, or some other adhesive. But the leaking fuel (diesel, in my case) interferes with the patch before it can cure and creates a new leak.
Draining the tank is no simple feat, either. I would need to remove the tank cover and siphon out all the fuel into some container, undoubtedly spilling some on the carpet and stinking up my car. Running the engine until the fuel level is low enough isn't an option because: a) the hole is on the very bottom, so the tank needs to be completely empty, and b) running it dry can damage the fuel pump (which relies on the diesel fuel for lubrication).
Is there any way I can temporarily plug up the pinhole for long enough time for epoxy or adhesive to cure?