Viscous fan behaviour

mcapinha · Jan 10, 2011

Hi.

Browsing through RAVE I found this:

The fan drive only has to be engaged periodically, between 5% and 10% of the time during normal driving conditions, because usually the vehicle is cooled by ram air.

If I'm interpreting this correctly, the fan should be stopped most of the time ?

Mine is always running and I thought that was OK. Never bothered to do the newspaper test even.

wammers · Jan 10, 2011

mcapinha said:
Hi.

Browsing through RAVE I found this:

If I'm interpreting this correctly, the fan should be stopped most of the time ?
Mine is always running and I thought that was OK. Never bothered to do the newspaper test even.

No with the engine running the fan is never stopped. But spins at a higher rate when engine gets warm. The viscous coupling is a variable clutch controlled by heat.

Viscous fan behaviour

mcapinha

Active Member

wammers

No longer with us, RIP

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