how hot is too hot?
my car has been overheating, it had a crack in the radiator which i had re-cored, but its still hotter than id like it to be. im pretty sure its the thermostat, which i will be replacing this weekend. however, a couple of times it got so hot it just about pegged the temp needle at 250. at this point it runs rough and will even stall sometimes. how would i know if i did any permanent damage?