The Importance of a Car Radiator Fan

car radiator fan

The Importance of a Car Radiator Fan

The car radiator fan is a crucial part of your vehicle’s cooling system. When the fan fails, it can cause your engine to overheat.

There are different types of radiator fans, ranging from mechanical to electric. Each type is used for a specific purpose.


A car radiator fan is an important part of the cooling system that helps regulate engine temperature. It also helps to remove heat from the coolant, which is circulating throughout the vehicle.

The engine in a car generates a lot of heat, which can lead to overheating and damage the vehicle’s internal components. This is why it’s essential to have a constant flow of air through the radiator, so that it can release that heat into the surrounding air and cool down.

There are different types of radiator fans available on the market, including mechanical and electric. Knowing the difference between them will help you choose the right one for your vehicle.

Mechanical Radiator Fan:

The most common type of radiator fan used in cars is the mechanical one. These fans mount on the water pump pulley, and they spin during low speed driving or idling. They are controlled by a clutch that engages and disengages to activate or deactivate the fan based on engine temperature.

These fans are incredibly efficient because they only turn on and off when the engine needs to. This allows the cooling fan to run only when needed, which saves energy and reduces noise during slow driving.

Most mechanical radiator fans are made of aluminum and use four to seven metal or plastic blades. Some are even made of composite materials.

They come in a variety of sizes and can be purchased as single or dual fan assemblies. The former is a single-fan setup that works well for most engines, while the latter is assembled in twos and is more suitable for larger vehicles or modified engines.

It is important to make sure that the fan is located properly in relation to the radiator and shroud. Often, a spacer is required to achieve the proper positioning.

A good spacer should be machined from a solid piece of aluminum. This will prevent bending and allow for a more accurate positioning of the fan.

It’s also a good idea to install a shroud on the fan, which improves the overall efficiency of the airflow. These shrouds can be a bit expensive, but the benefits of improved airflow are worth it.


A car radiator fan is an important part of any cooling system. Keeping the engine cool is essential to prevent damage and keep it running properly. It also helps dissipate excess engine heat and can be critical to fuel economy.

The fan has a number of uses, but its main function is to draw air into the radiator to cool the engine. Often it is operated by an electric motor, but some may be hydraulic or belt driven.

Some of the benefits of switching to an electric fan include improved fuel efficiency and reduced load on the engine during driving conditions, such as idling. Many vehicles now have a thermostatic sensor switch fitted to the cooling system which automatically switches on the fan when the temperature of the coolant rises above a set point. This will then run until the temperature drops below that set point.

Another advantage of an electric fan is that it can be incorporated into any cooling system without the need for additional wiring. This is particularly useful in the case of vehicles where it is difficult to fit a belt driven fan and the radiator shroud might not line up with the fan’s pulley.

When choosing a fan, it is important to consider the size and power draw of the unit. A 12-inch fan will typically draw between 15 and 28 amps, while a 16-inch fan draws up to 35 amps.

The shape and design of a fan’s blades can have an impact on the amount of current needed to keep it spinning. Wind tunnel tests and airflow computational models show that a curved blade design requires less current than a straight fan blade.

This is one of the reasons that Maradyne High Performance Fans make their fans spec equipment for several NASCAR Nationwide and Cup Series teams. They are used to battle the extreme heat of racing, stop-and-go driving and off-roading.

The company’s engineers use this same design to build fans for cars, trucks, street rods and muscle cars. They are also suited for high-performance car radiator fan off-road applications that require a lot of movement such as rock crawling, off-road races and water crossings.


The radiator fan is an important part of your car’s engine cooling system. Without it, your engine would overheat, which could lead to engine problems.

There are several different types of radiator fans to choose from, including mechanical and electric. Both have different benefits and disadvantages, but it’s important to understand which type is best for your vehicle.

A mechanical fan is a popular option for older vehicles and cars with a traditional powertrain. It runs off the engine crankshaft and is backed up by a clutch to ensure that it comes on only when needed.

Mechanical fans are usually more expensive than their electric counterparts, but they have a number of advantages. These include the ability to be serviced easily and the fact that they can move large volumes of air.

When choosing a fan, consider how much air it can move, as well car radiator fan as the amount of current it draws from your engine’s electrical system. This determines how high the CFM rating can be.

The CFM rating of a fan can vary, but generally speaking, higher CFM ratings are more expensive. This is due to the fact that they have a different design than lower CFM fans, which are less expensive.

A dual radiator fan is a set of two fan assemblies that work together to help cool your engine. The setup allows for more air flow, which is useful when your engine is larger and needs extra cooling.

This type of radiator fan is typically used on large vehicles and those with modified engines that require more cooling. It also helps to maximize airflow through the radiator core for better cooling efficiency.

When looking for a dual radiator fan, make sure it’s sized properly to fit the radiator. This can be done by taking measurements of your radiator.

Another thing to keep in mind is that most radiators are rectangular in shape, so one fan will not cover the entire area of your radiator. This means that you may need a dual fan setup to cover your radiator completely.

You can purchase a dual radiator fan at any auto parts store or online retailer. It may cost a little more than the single fan, but it’s worth it in most cases.


The car radiator fan helps to cool the engine and other components by moving air over the heat-absorbing metal radiator fins. The fan blades spin at a steady rate to provide the airflow that is necessary when the radiator core does not receive much or any air.

Electric fans are available in a variety of styles, and you should choose the best one for your vehicle. There are pusher and puller fans, as well as straight and curved blades. The main difference between the two is that a straight blade moves more air but generates more noise, while a curved blade generates less air but is quieter.

When choosing an electrical fan, consider the engine size and cooling needs of your vehicle. The best fans will produce the airflow required to keep your engine at a safe temperature without creating unnecessary pressure.

You may also want to choose a model with a shroud integrated into the fan. This feature helps to improve the efficiency of the fan and prevents it from wasting energy and overheating your engine.

CFM, or cubic feet per minute, is a measure of how much air the fan can move in one minute. You can find this information on the product packaging.

Most manufacturers will use CFM as a way to compare their products and will often throw cfm numbers around as a way to promote their products. While this can be useful for comparison purposes, it is not meaningful enough to be used in a purchasing decision.

A CFM rating doesn’t mean that the fan will flow that much air, but it is a good guide to help you select a fan that will work for your application. This is especially true when you have a large or modified engine.

For example, a small-block requires 2,800 to 3,000 cfm to cool properly. A big-block requires 4,500 cfm or more.

When comparing a radiator, pump, or fan, you should always look at the pressure curves as well as the airflow. This is because the airflow must match the pressure required by the system to properly cool.

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