[Early_S_Man]

Oliver,

I am not saying that all of the above damage occured ... just that those are some possibilities. I would be willing to bet that your engine at driver's school didn't smoke like it did today ... even though the oil temp was 220°F! The smoking is indicative that the cylinders and heads got very, very HOT, much higher than normal operating temps when the oil is 210°F!

Oil temperature is not really the issue, because it takes a while for 10 qts of oil to heat up, and finned cylinders and heads with no airflow can get very hot in just a few seconds, and cetainly in a few minutes!

Any estimate on the time it took yoyu to drive the two miles or so?

I have seen air-cooled motorcycle engines get galled pistons even before they got to the 'smoking' point ... so I know it is possible! Compression testing showed immediate damage on that particular engine, but honing the cylinder and replacing the rings returned that engine to service, to survive for many more years without any further incidents!