Cadillac 19150977 Clutch,Fan

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The radiator fan should be replaced if the blades become damaged or bent. The fluid drive fan clutch is disengaged when the engine is cold, or at high engine speeds, when the silicone fluid inside the clutch is contained in the reservoir section by centrifugal action. Symptoms of failure of the fan clutch are continuous noisy operation, looseness leading to vibration and evidence of silicone fluid leaks. Disconnect the negative cable from the battery. Remove the upper fan shroud. On 1996 and later V6 and small block V8 engines, use a large spanner wrench to remove the fan clutch from the water pump hub. On all others, loosen the fan clutch-to-hub nuts. Remove the drivebelt. Remove the fan assembly from the water pump. The fan clutch can be unbolted from the fan blade assembly for replacement. Installation is the reverse of removal.

Start the engine when it is lukewarm and let it run for two minutes. - Remove the key from the ignition switch for safety purposes. - Turn the fan blades and note the resistance, which should be moderate depending on temperature. - Drive the vehicle until the engine is warmed up, then shut it off and remove the key. - Turn the fan blades again and there should be a noticeable increase in resistance.

After removing the fan clutch, you should remove the drivebelt and then remove the fan assembly from the water pump.

If the fan clutch fails the check or is locked up solid, replacement is necessary.