Going to look at a 1961 Minneapolis Moline Jet Star. Won't turn over as one piston is seized. Is there any way to check or test to see if the block is cracked?
First time I have bought anything with a motor that wasn't running.
Check the oil, if it is milky the head gasket or a cylinder liner has failed. How does the seller know only one piston is seized? A good auto parts store should have a cooling system tester available for a reasonable price, the cap goes on the radiator and low pressure, usually 15-20 psi is applied. If it bleeds down there is a leak.