Modern anti-freeze was not available until some time after the Second World War. However, corrosion has always existed. Almost immediately after World War II, most cars used water, an anti-corrosion agent, and when needed, a third agent (sometimes methanol) as antifreeze. Because the boiling point of water is higher than most modern antifreeze, serviceable cars of the era were not as prone to overheating as vintage cars that run on antifreeze today. I have a 1949 Pontiac and live in the southโฆ