Why does the engine temperature still rise after adding antifreeze?
2 Answers
The reason why the engine temperature still rises after adding antifreeze is: improper addition and replacement of antifreeze, which causes premature blockage of the engine water channel and radiator, resulting in high engine temperature. Antifreeze should be replaced every two years, and original equipment manufacturer (OEM) antifreeze must be used during replacement and addition. If the concentration is too high, it will lead to poor heat dissipation and engine overheating. The full name of antifreeze is antifreeze coolant, meaning a coolant with antifreeze function. It can prevent the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head when parking in cold winter. Antifreeze is a type of coolant containing special additives, mainly used in liquid-cooled engine cooling systems. It has excellent performance such as antifreeze in winter, anti-boil in summer, and anti-scale and anti-corrosion all year round.
I often encounter this issue, especially when I work on my own car. Adding coolant doesn't help when the temperature is too high. Coolant isn't a one-time fix; it only addresses freezing and boiling points. But if there are air bubbles in the cooling system, like what happened to me last time, the liquid can't circulate, and the temperature still skyrockets. If the water pump is stuck, it simply can't push the liquid, and if the radiator is clogged with rust, the heat can't dissipate. Then there's the thermostat—if it gets stuck in the closed position, it's a disaster, trapping all the heat inside the engine. The fan not spinning is also common; if the sensor fails, it won't start, causing overheating even at high speeds. When checking, feel the radiator—if it's unevenly hot and cold, you know there's a problem. You must bleed the system professionally or replace parts to prevent engine damage.
