Toyota 16210-31020 Fluid Coupling Assembly

Symptoms of fan clutch failure are continuous noisy operation, looseness, vibration or silicone fluid leaking from the clutch. To check for these symptoms, rock the fan back and forth by hand to check for excessive bearing play. With the engine cold, turn the blades by hand. The fan should turn freely. Visually inspect for substantial fluid leakage from the fan clutch assembly, a deformed bi-metal spring or grease leakage from the cooling fan bearing. If any of these conditions exist, replace the fan clutch. Start the engine and allow it to warm up to its normal operating temperature. When the engine is fully warmed up, turn off the ignition switch. Turn the fan by hand. Some resistance should be felt. If the fan turns easily, replace the fan clutch. To remove the fan clutch, remove the radiator support shield and the coolant reservoir, then remove the fan shroud upper mounting bolts. The lower portion of the fan shroud is attached to the radiator using locating notches on each side. The fan shroud must be lifted straight up to clear the notches. Separate any hoses and harness wires from the lower section of the fan shroud. Remove the fan clutch-to-water pump pulley mounting nuts and separate the fan from the pulley. Lift the fan and shroud from the engine compartment. To separate the fan blades from the viscous clutch hub, remove the mounting bolts. Installation is the reverse of removal.