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Leaking Radiator Cap Causes Radiator to Boil Over when the Engine is Semi-hot

Car trouble symptoms

Even if the car engine is semi-hot the radiator boils over.


Car Problem Diagnosis

This kind of problem occurs when the car is experiencing a leaking radiator cap. The purpose of the radiator cap is to keep the entire cooling system of the car under pressure. If the radiator cap is leaking the coolant boiling point will be lower than its normal boiling point and will cause the coolant to boil easily even if the engine is semi-hot.

 
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