Fan Spacer
An engine cooling fan spacer, also known as a fan extension or fan hub spacer, is a component located between the engine's water pump and the fan clutch or fan assembly. The fan spacer is typically made of aluminum or steel and is designed to properly locate the cooling fan in the radiator fan shroud. The fan spacer plays a critical role in maintaining proper airflow through the radiator and preventing an overheating engine. In most applications, the length of the fan spacer should put the blades of the fan halfway inside and outside of the fan shroud opening. This is particularly important in high-performance or during high-temperature use where the engine generates a significant amount of heat. The fan spacer is typically bolted onto the water pump using a series of bolts, and the fan assembly or fan clutch is then bolted onto the mechanical fan spacer. The fan spacer must be installed correctly to ensure proper clearance and prevent damage to the fan assembly, radiator, and engine components.
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When choosing a fan spacer, first match the engine application so that the fan spacer bolt threads and fan spacer pilot hole diameter will match those on the water pump. Next confirm the required fan spacer length, which will put the fan blades halfway inside and halfway outside of the radiator fan shroud opening, for maximum airflow and heat extraction. From the remaining compatible options, choose the fan spacer that meets your specific application needs and budget.
JEGS offers a generous selection of fan spacers from the best brands in the automotive aftermarket, including Coleman Racing Products, Derale, Flex-A-Lite, Mr Gasket, JEGS, and many others. Each fan spacer is made from high-quality materials and production to provide long lasting service your engine deserves.
