thebax2006
If anything turns off a motor because it got too hot the damage is already done!
Put a thermostat in the motor. It's cheap and easy to do.
Anonymous
How can you know? Simple - no cars made have such a protection system. The driver is supposed to monitor the temperature gauge and shut it down themselves if it gets too hot.
dtstellwagen
Check the owners manual for your car, you can likely download it.
Scott
Don't worry, it will shut off if it gets too hot.