What Are the Reasons for BMW Engine Overheating?

[ArianaLynn]

BMW engine overheating can be caused by excessive dirt on the surface of the radiator or a malfunctioning thermostat, among other reasons. Below are the detailed explanations:1. Coolant Introduction: Engine coolant, also known as antifreeze, is not ordinary water but a solution composed of a base fluid and water. Engine coolant serves four main functions: cooling, corrosion prevention, scale prevention, and freeze protection. It is an essential medium for the proper operation of the engine.2. Function of Coolant: Most vehicles use water-cooled engines, which rely on the continuous circulation of coolant within the engine for heat dissipation. The coolant follows two circulation paths inside the engine: a major cycle and a minor cycle. When the engine is first started, the coolant undergoes the minor cycle to allow the engine to warm up quickly. Once the engine reaches its normal operating temperature, the coolant switches to the major cycle to maintain the engine within a normal temperature range.