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Your car’s engine needs to be cooled in order to work. In a mechanical cooling system, the cooling fan is driven by the same belt that activates the water pump. With an automatic cooling system (also known as a thermal system), hydraulic devices vary the speed of the fan in relation to the temperature of the engine. A “high delivery” fan delivers cooling to the engine at reduced speeds, eliminates over-cooling, lowers the noise level, and prevents loss of power at high speeds. With this type of system, the whole assembly is known as the hydrostatic fan and hub.
The automatic fan clutch fully engages when the hydraulic fluid reaches a high enough level to fill the clutch body and clutch plate grooves; this process cools the engine. When the engine is sufficiently cooled, the fan clutch disengages and blocks the flow of the fluid.
If your engine is overheating, the problem could be in the hydrostatic fan and hub. It may also be due to various other problems. If you have persistent overheating problems, have one of our expert mechanics diagnose the problem and determine whether the problem is with the fan and hub, or if it lies elsewhere.
If there are problems with your cooling system, you should immediately have your vehicle inspected by one of our expert mechanics. If your engine overheats even once, you can end up with damaged valves, broken cylinder heads, or a cracked engine block that will entail full engine replacement. If the hydrostatic fan and hub is faulty, have it replaced immediately.