There are different reasons for that but the most important is the availability of space. In some cars, the fan is installed between the radiator and grille. Radiator fans are usually mounted in the space between the engine and radiator. Some are curved while others are straight. If you observe different engine cooling fans, you will easily notice a difference in the design of blades. Fans that run off the engine are commonly used in older vehicles, while modern cars used electric fans. In most radiator fan assemblies today, a shroud is added to direct air toward the radiator and improve airflow efficiency.Īutomotive radiator fans are powered in by either the engine crankshaft or an electric motor. The motor’s function is to produce the rotational force that spins the fan blades. The radiator fan assembly comprises a 12V DC motor and fan blades. The fan rotates to produce airflow when there’s little to no air rushing through the grille, thereby helping to prevent the engine from overheating. The device that performs the function is called the radiator cooling fan. But not so when you stop for some time or when stuck in slow-moving traffic.ĭuring such times, the airflow to cool the radiator must come from somewhere. When your car is moving at a considerable speed (over 25mph) the air blowing through the grille effectively takes away heat. It’s positioned behind the grille so that the air streaming in will cause the coolant to cool. The radiator consists of tubes carrying hot coolant from the engine. The system consists of channels to circulate coolant around the engine and a radiator to cool the heated coolant. To remove the heat, most cars use a water cooling system. This heat must dissipate or the engine temperature will rise to dangerous levels. What’s the Radiator Fan Purpose in your Car?Ī vehicle engine generates tremendous amounts of heat when running. Let’s start by looking at what a cooling fan does and the different types available today. If you’re about to buy a radiator fan, read on for useful tips on how to find the right type for your car and engine. Engine cooling need also vary across vehicles which further complicates the selection process. The fan is one of the most challenging parts to buy, though, with its many different designs and prices. The car radiator fan helps to regulate engine temperature and prevent overheating.
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