What causes the car radiator to overheat and boil?

1 Answers
SanAlejandro
07/24/25 9:55am
The reasons for frequent radiator overheating: 1. Malfunction of the cooling fan, where the heat generated during high-speed operation cannot be effectively transferred to the coolant, affecting heat dissipation and leading to increased coolant temperature, causing boiling issues. 2. Failure of the car water pump, including seized bearings or damaged impellers. Common impeller damages include cracks or detachment from the pump shaft, slowing down the coolant circulation and causing the engine to overheat. 3. The radiator has many pores formed by cooling fins, which can easily get clogged with fluff, sludge, etc., reducing air permeability and heat dissipation efficiency. This often leads to high water temperature in summer, and timely cleaning of the radiator can resolve the issue.
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