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At first glance, the cooling fan shroud appears to be purely a safety feature to prevent touching the fan blades when they are turning. While the fan shroud does perform a protective function, that isn’t the only or primary purpose. The cooling fan runs to provide extra air flow through the radiator and air conditioning condenser, which removes heat from the engine coolant and the air conditioning refrigerant. As the fan draws air through the radiator and condenser, the fan shroud concentrates the airflow to efficiently cool the components, and wash the air over the engine under the hood. Without the cooling fan shroud, air would disperse in all directions under the hood, which would operate less efficiently. With the cooling fan shroud removed, the engine cooling loses about half its effectiveness. If the cooling fan shroud is cracked, damaged or missing, it can contribute to your engine overheating and less efficient air conditioning system operation. If your fan blades are contacting the fan shroud, damage to the cooling fan can also occur.
If the cooling fan shroud is broken or missing, have it replaced to optimize your engine’s cooling ability and your air conditioning system’s performance. It should last the lifetime of your vehicle otherwise.
The cooling fan is responsible for up to 50 percent of the engine’s cooling capacity. Without it, there is an obvious risk of overheating and causing additional mechanical damage. In addition, anyone working under the hood of a vehicle with a broken or missing fan shroud is at risk of personal injury if the fan unexpectedly turns on. Have your fan shroud replaced immediately.
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