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  How does a clutch fan work?

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Author Topic:   How does a clutch fan work?
rockafellz
Gearhead

Posts: 1249
From: San Lorenzo, CA, USA
Registered: Aug 2001

posted 06-06-2003 02:18 AM     Click Here to See the Profile for rockafellz   Click Here to Email rockafellz     Edit/Delete Message   Reply w/Quote
Let's see if I have this correct...

When the radiator is cold, the clutch fan is cold and is dis-engaged?!?

When the radiator is hot, the clutch fan coil (or oil?) expands and grabs the fan and turns the same speed as the pulleys turn.

It dis-engages when the temp goes down?

Is this correct?

Thanks in advance.

Erik

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1966 Ford Mustang 2+2
Mine - Restomod in Progress

1966 Ford Mustang Coupe
Dad's - Original Unrestored

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69 Sportsroof
Gearhead

Posts: 1138
From: Valley, Alabama, USA
Registered: Mar 2002

posted 06-06-2003 11:54 AM     Click Here to See the Profile for 69 Sportsroof   Click Here to Email 69 Sportsroof     Edit/Delete Message   Reply w/Quote
That's the way thermal cluthes work. The non thermal are engaged at low rpm and them release at higher rpms when in theory you dont need the fan (highway speeds). From all I can tell the thermal would be the way to go for a cruising car but they are a tad more expensive......

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indyphil
Gearhead

Posts: 635
From: Lafayette, IN, USA
Registered: Jul 2002

posted 06-06-2003 12:09 PM     Click Here to See the Profile for indyphil   Click Here to Email indyphil     Edit/Delete Message   Reply w/Quote
I recall a friend of mine owned a car that had a clutch type fan (I think it was the low speed kind) but the clutch jammed and the fan ran above its rated speed before finally letting go one day without warning. Made a real mess under the hood. Just a silly story - but i have kept my distance from clutch fans since then.

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'68 coupe 289 C code
66 heads, edel 600cfm carb, performer intake, dual exhaust

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