What Causes High Engine Temperature When Climbing Hills?

[LeEmiliano]

There are several main reasons for high engine temperature when a car climbs hills: poor heat dissipation in the engine and air conditioning system, improper addition and replacement of coolant, and damage to the water pump thermostat. Below are detailed explanations and solutions: Poor heat dissipation in the engine and air conditioning system: When stuck in traffic or idling for extended periods, the engine temperature gauge shows excessively high readings, the electric fan operates at high speed for prolonged durations, engine noise increases, and these issues are most noticeable when using the air conditioning in hot weather. The solution is to check if there is excessive dust between the condenser and radiator, thoroughly clean them with high-pressure air, and ensure the radiator and condenser maintain good heat dissipation performance. Improper addition and replacement of coolant: This can lead to premature clogging of the engine water passages and radiator, resulting in high engine temperature. Adding water to the engine cooling system or using coolant with a concentration exceeding 60% can both cause the engine temperature to rise excessively. The solution is to replace the coolant every two years and always use genuine parts when adding or replacing it. Damage to the thermostat: The thermostat, located on the water pump, fails to open when the engine temperature is high, which is another cause of engine overheating. The solution is to replace the thermostat.