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Radiator Cap Pressure

Q: My car was overheating so I changed the thermostat. It is still overheating. The electric fan seems to be engaging and the antifreeze is full. What else should I check?

A: A bad radiator pressure cap could be causing the car to overheat. By keeping pressure on the cooling system, the pressure cap increases the boiling point of the antifreeze. If the pressure cap is not working properly, the engine could overheat.