What Causes Coolant to Boil?

1 Answers
Nicholas
07/29/25 4:01pm
The reasons for coolant boiling include blockages in the coolant circulation system, insufficient coolant, or radiator malfunctions. Here are the detailed explanations: 1. Blockages in the coolant circulation system: Any blockage or leakage in the entire coolant circulation system can lead to engine overheating and coolant boiling. Immediate repair is necessary upon discovery of such issues; otherwise, it may result in engine bearing failure or piston seizure, significantly increasing repair costs. Solution: Visit a 4S shop for inspection and repair. 2. Insufficient coolant: Coolant naturally decreases over time with use. However, if the coolant level drops too low, cooling efficiency will decline, leading to coolant boiling and even engine overheating. Solution: Promptly replenish the coolant. 3. Radiator malfunction: If the radiator has been damaged and repaired, insufficient cooling surface area can almost certainly cause coolant boiling. Additionally, poor internal flow or obstructed external ventilation in the radiator can also be problematic. These issues, if severe, can affect the engine, causing its temperature to rise as well. Solution: Visit a 4S shop for inspection and repair.
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