What are the general causes of a car overheating?

1 Answers
ClaireFitz
07/30/25 3:17am
The general causes of a car overheating are poor engine coolant circulation and insufficient fan speed. Below are the specific details: 1. Poor engine coolant circulation: Insufficient coolant prevents the formation of a large circulation for cooling. The water pump speed is insufficient due to factors such as belt slippage or severe corrosion of the pump's turbine blades, leading to inadequate water pumping. 2. Insufficient fan speed: This includes fan belt slippage, damage to the fan's silicone oil clutch, worn-out carbon brushes in the fan motor causing intermittent operation, or a damaged fan shroud resulting in excessive air leakage. Additionally, issues with the fan relay may prevent it from engaging, or it may engage at low speed but fail at high speed, causing the fan not to operate at high speed when the engine overheats.
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