The radiator fan is an important component of the modern automobile's cooling system, so once they conk out they need to be replaced immediately to avoid heat-related problems with the engine. However, buying a new set of radiator fan blades isn't as simple as walking up to the auto parts store and picking one whose color you like. Fan blades come in many different types, and buying the right one is crucial in ensuring that the radiator and the engine perform as they should.
When buying a new radiator fan blade, take note of the following points:
Engine-driven vs. Electric
One of the key pointers to consider when buying a new radiator fan blade is whether the blade is powered by the engine or battery. Engine-driven fans, which are also known as manual radiator fans, only function when the engine is running and spins at the same rate as the engine. Electric radiator fans, on the other hand, are attached directly onto the radiator and use the car battery as a power source. You cannot mount an engine-driven fan or fan blade on radiators designed for use with electric radiator fans and vice-versa, so make sure to verify the parts before purchasing.
Number of blades
Another factor to consider when purchasing fan blades is the number blades the fan has. Radiator fans can have anywhere from 4 to 10 blades, and the more blades a fan has the more air it is able to push to the radiator. However, more blades also means the fan will have to compensate for the space and weight. Thus a fan blade than is meant for a 10-bladed fan is different both in weight and appearance compared to a blade designed for use with four-bladed fans.
Flex fan blades
When buying fan blades, you may want to give flex fan blades a try. One of the latest designs in fan blades, flex fan blades flatten once the fan reaches a certain RPM. This reduces resistance of the blades to almost zero and cutting down energy consumption in the process. But once the engine slows down, the blades return to their original state and work to keep the engine cool.