- Check the radiator cap for proper sealing. A faulty radiator cap may not maintain the required pressure, causing the coolant to boil and overflow.
2. Coolant System Pressure Issues:
- Excessive pressure buildup in the cooling system can lead to boiling and overflowing. Check for any blockages or restrictions in the coolant hoses or radiator that could prevent proper circulation.
3. Faulty Thermostat:
- A stuck thermostat can prevent the coolant from flowing properly through the radiator, causing overheating and boiling.
4. Head Gasket Failure:
- A blown head gasket can allow combustion gases to leak into the cooling system, causing pressure buildup and coolant boiling.
5. Faulty Water Pump:
- A failing water pump can't circulate the coolant effectively, leading to overheating and boiling.
6. Low Coolant Level:
- Insufficient coolant can cause the engine to overheat and boil. Check the coolant level and add more if necessary.
7. Air in the Cooling System:
- Air pockets trapped in the cooling system can cause localized overheating and boiling. Bleed the cooling system to remove any trapped air.
8. Faulty Temperature Sensor:
- A faulty temperature sensor may provide incorrect readings, causing the engine to overheat without the driver's knowledge.
If the issue persists after checking these factors, it's recommended to consult a professional mechanic for further diagnostics and repairs.
