What Causes Car Coolant to Boil Over?

1 Answers
CollinFitz
07/30/25 5:40am
The reasons for car coolant boiling over are: 1. The radiator fan is damaged and not functioning properly; 2. The radiator is clogged, leading to poor heat dissipation and boiling over; 3. Thermostat failure; 4. Insufficient coolant; 5. Poor water pump performance; 6. Abnormal coolant temperature sensor, gauge, or circuit; 7. Use of high-quality coolant. The method for replacing coolant is: 1. Open the vehicle's engine hood and locate the coolant reservoir; 2. Open the coolant drain plug under the radiator to drain the old coolant; 3. Add new coolant and tighten the cap. The functions of coolant are: 1. Providing antifreeze protection for the engine against low-temperature environments; 2. Preventing the coolant from freezing and cracking the radiator or damaging the engine block and cylinder head during cold winter parking; 3. Providing efficient heat dissipation.
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