Viscous fans only limit how fast the fan spins in relation to engine RPM...... There are Thermostatically controlled viscous fans which also "lock up" or "tighten up" the drive of the fan related to temp. If the fan clutch has a spring in the center of it, its a thermostatically controlled fan. If not, its only a viscous fan. If a fan clutch goes bad, typically it will appear to be real loose, and may even appear to not spin in relation to the engine, if at all, at idle. If the fan "freewheels" and has very little if any resistance (engine off of course)...... the clutch is probably bad.On Thu, Aug 29, 2019 at 2:10 PM williamgrogan2002@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:Do I understand correctly that once the engine is hot the fan should become more difficult to spin as the fluid inside the clutch becomes more viscous? Seems like mine stays rather easy to spin when stone cold or after running for some time. Asking because the car seems to run warmer than it used to (not hot, just warmer).
Bill
Just east of the Gateway Arch.
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Posted by: rob bohuslav <sonoramic413@xxxxxxxxx>
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