An engine will overheat for two reasons; 1) poor coolant
circulation --either the thermostate is stuck or the radiator
is stopped up. 2 ) You are loosing coolant due to a leak.
Remove the theromostat and see if the car still overheats.
If so then you have a leak somewhere. If you have a warped
head or blowned head gasket, there will be white smoke out
Lately I have seen a lot of cars that indicate overheating but
do not overheat. That is because the temperature sensor is
defective. If after overheating your car still has a proper
coolant level that could be the cause or a defective thermostat.
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