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2026. 6. 30. 작업

증상

Can radiator cool down a car too much?

처리 내용

If the thermostat is operating properly the radiator will only come into play when the thermostat opens, when the engine is at normal operating temperature (around 190 degrees, give or take). Adding a gigantic radiator won't make a bit of difference because if the engine gets too cold, the thermostat will close, causing the engine to heat up again. In the winter, the cabin heater will draw around 20% of the engine's heat in order to heat you. This will cause the car to heat up slightly slower, but once it's warm it will stay that way. It's possible that the thermostat isn't fully closing when you are driving, but works ok at idle. You might consider getting a high quality thermostat and replacing the existing one. It's also possible that the coolant temp sensor is on it's way out.. On the highway, a car produces lots of heat (at a higher RPM), which indicates to me that the thermostat is opening more (or failing to close properly) at higher RPMs since you are seeing a temp DEcrease at