What Are the Causes of Excessive Coolant Temperature?

[VanKennedy]

The causes of excessive coolant temperature: 1. The coolant level is too low, insufficient circulating water volume, or coolant leakage. 2. Blockage, corrosion, or excessive scaling in the radiator, cooling water jacket, or water distribution pipe, leading to reduced heat dissipation capacity. 3. Thermostat failure, preventing normal opening and resulting in poor coolant circulation. 4. The electric fan does not operate due to wiring or motor failure. 5. Insufficient water pump output, loose or slipping water pump drive belt, damaged water pump impeller, or poor sealing. 6. Delayed engine ignition timing, excessively rich or lean air-fuel mixture. 7. Excessive combustion carbon deposits increase the compression ratio, causing detonation or poor engine exhaust. 8. Cylinder head gasket failure, allowing high-temperature gases to enter the cooling system.