Nissan 21060-4S100 Fan-Cooling

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Disconnect the cable from the negative terminal of the battery and rock the fan back and forth by hand to check for excessive bearing play. With the engine cold (and not running), turn the fan blades by hand. Visually inspect for substantial fluid leakage from the clutch assembly. With the engine completely warmed up, turn off the ignition switch and disconnect the negative battery cable from the battery. Turn the fan by hand. Loosen the fan/water pump pulley nuts several turns. Remove any drivebelts which would interfere with the removal of the radiator fan drivebelt, then remove the radiator fan drivebelt. Detach the lower half of the fan shroud. Remove the fan/water pump pulley nuts and pull the fan/clutch assembly out from the bottom. Carefully inspect the fan blades for damage and defects. At this point, the fan may be unbolted from the clutch, if necessary. Be sure to re-install the fan blade with the "F" mark facing the front of the engine. Installation is the reverse of removal. Be sure to tighten the fan and clutch mounting nuts evenly and securely.

After the engine is completely warmed up, turn off the ignition switch and disconnect the negative battery cable. Then, turn the fan by hand to assess its operation in this state.