why is the radiator fan called a clutch fan??

[GT500916]

http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW

was looking at some fans on ebay and why are they called the clutch fan? isnt it the radiator fan? and how in the world does it cool off the clutch haha, explain that one to me please

[musicsurfman]

Its Called A Clutch Fan Because That Metal Thing The Plastic Fan Blades Attach To Is A Clutch.... And It Allows For Slippage Under Certain Situations And Full Operation Under Others. Its Basically A Self Regulating Thermostat.... Also Some Mechanical Water Pumps Use The Weight Of The Assembly To Help Properly Flow Water.

[GT500916]

thank you or that reply.. so would it be a good thing to install an electric fan? it wont put as much stress on the engine because of the belt powered fan?

[musicsurfman]

There Are Pros And Cons To Both Systems... For Street Driving I'd Say A Clutch Fan Is Better If Thats What The Car Was Equiped With Oem. For Some Racing Applications A Electric Fan Is Better.