[Terry, NJ]

This problem started last summer! My Town sedan with it's new engine ($$$) and was siting for a while and I like to start it now and then. So I hooked it up (Electrically) and started cranking. It started, ran for 30 sec., a minute. Not long! Restarted it again, same thing. Again and again. Each time it ran for less duration. Finally, it locked up. Nothing will get it to turn. I removed the radiator and the head and with a 1 3/8", 3/4 drive socket and breaker bar and lots of MMO, I tried to break it free, No Go! Someone suggested tapping a block of wood on top of the pistons, again Nothing! I have jacked the wheels, put it in 3rd and tried to turn it, nothing! I am contemplating using and old starter with two 12V (24V) batteries. I also heated the cylinder walls (not the pistons) to expand them slightly, no luck! Anyone got a solution? I have never seen an engine so thoroughly seized.
Terry