Fan Noise

Fan noise is sometimes evident under the following conditions:
^ When the clutch is engaged for maximum cooling.
^ During the first 15 seconds to one minute after start-up until the clutch can redistribute the silicone fluid back to the fluids normal disengaged operating condition (after overnight settling).

Fan noise, or an excessive roar, generally occurs continuously under all high engine speed conditions (2500 RPM and up) if the clutch assembly is locked up because of an internal failure. If the fan cannot be rotated by hand, or if there is a rough grating feel as the fan is turned, replace the clutch.