Fan Clutch
Racer
Joined: May 2008
Posts: 353
Likes: 0
From: boulogne buenos aires
My 2003 ranger pick up 2.8 l power stoke also has a belt driven clutch fan!!!
regardin fan I had the flex one with the alloy extention, it was very noisy but worked fine. (they are said that the alluminun blades eventually collapse and can go through the hood). Finally got the chance to buy a complete 5 blade fan and clutch from a guy who also sold me a complete set of rally wheels, ring trim and cups. a very hard find here in argentina, I was very lucky. And i`m very happy with the original look of the car. Tº needle in my car never goes past 1/4 of the marks in the gauge. And we are very hot now. I had the radiator core replaced with a one with more closed pattern.
my two cents
regardin fan I had the flex one with the alloy extention, it was very noisy but worked fine. (they are said that the alluminun blades eventually collapse and can go through the hood). Finally got the chance to buy a complete 5 blade fan and clutch from a guy who also sold me a complete set of rally wheels, ring trim and cups. a very hard find here in argentina, I was very lucky. And i`m very happy with the original look of the car. Tº needle in my car never goes past 1/4 of the marks in the gauge. And we are very hot now. I had the radiator core replaced with a one with more closed pattern.
my two cents
Burning Brakes
Joined: Apr 2008
Posts: 945
Likes: 1
I'm in the process of replacing my fan and clutch as well. Can someone tell me if "engaged" means the fan is not turning as described below? It would make sense to me to have the fan not turning at high speed but the terms seem backwards to me.
Why would you want the fan turning at high speed and not turning at low speed?
Hayden Fan Clutch 1970-1974 Chevrolet Corvette "HAYDEN FAN CLUTCH -- Severe-Duty Thermal Design, Standard Rotation, 6.45 in. Overall Diameter, 0.75 in. Pilot Diameter, 1.63 in. Fan Mount Height, 3.25 in. Fan Bolt Circle, 5/16-18 Hole 4 Bolt And Nut Threads, Varies The Fan Speed With Temperature Of The Air Behind The Radiator, Engaged High Speed Operation Provides Maximum Cooling, Disengaged Low Speed Operation Provides Fuel Savings And Noise Reduction, Offers Greater Life Expectancy Than A Non-Thermal Clutch, Briefly Engaged At Cold Start-Up, Engages At About 170 Degrees Radiator Air Temperature About 30 Degrees Lower Than Coolant Temperature, With Hayden's Limited 5-Year Warranty"
Why would you want the fan turning at high speed and not turning at low speed?
Hayden Fan Clutch 1970-1974 Chevrolet Corvette "HAYDEN FAN CLUTCH -- Severe-Duty Thermal Design, Standard Rotation, 6.45 in. Overall Diameter, 0.75 in. Pilot Diameter, 1.63 in. Fan Mount Height, 3.25 in. Fan Bolt Circle, 5/16-18 Hole 4 Bolt And Nut Threads, Varies The Fan Speed With Temperature Of The Air Behind The Radiator, Engaged High Speed Operation Provides Maximum Cooling, Disengaged Low Speed Operation Provides Fuel Savings And Noise Reduction, Offers Greater Life Expectancy Than A Non-Thermal Clutch, Briefly Engaged At Cold Start-Up, Engages At About 170 Degrees Radiator Air Temperature About 30 Degrees Lower Than Coolant Temperature, With Hayden's Limited 5-Year Warranty"
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Just really bad grammar, please read the edited text above. Maybe their copy writer is in Bangalore.
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
I'm in the process of replacing my fan and clutch as well. Can someone tell me if "engaged" means the fan is not turning as described below? It would make sense to me to have the fan not turning at high speed but the terms seem backwards to me.
Why would you want the fan turning at high speed and not turning at low speed?
Hayden Fan Clutch 1970-1974 Chevrolet Corvette "HAYDEN FAN CLUTCH -- Severe-Duty Thermal Design, Standard Rotation, 6.45 in. Overall Diameter, 0.75 in. Pilot Diameter, 1.63 in. Fan Mount Height, 3.25 in. Fan Bolt Circle, 5/16-18 Hole 4 Bolt And Nut Threads, Varies The Fan Speed With Temperature Of The Air Behind The Radiator, Engaged High Speed Operation Provides Maximum Cooling, Disengaged Low Speed Operation Provides Fuel Savings And Noise Reduction, Offers Greater Life Expectancy Than A Non-Thermal Clutch, Briefly Engaged At Cold Start-Up, Engages At About 170 Degrees Radiator Air Temperature About 30 Degrees Lower Than Coolant Temperature, With Hayden's Limited 5-Year Warranty"
Why would you want the fan turning at high speed and not turning at low speed?
Hayden Fan Clutch 1970-1974 Chevrolet Corvette "HAYDEN FAN CLUTCH -- Severe-Duty Thermal Design, Standard Rotation, 6.45 in. Overall Diameter, 0.75 in. Pilot Diameter, 1.63 in. Fan Mount Height, 3.25 in. Fan Bolt Circle, 5/16-18 Hole 4 Bolt And Nut Threads, Varies The Fan Speed With Temperature Of The Air Behind The Radiator, Engaged High Speed Operation Provides Maximum Cooling, Disengaged Low Speed Operation Provides Fuel Savings And Noise Reduction, Offers Greater Life Expectancy Than A Non-Thermal Clutch, Briefly Engaged At Cold Start-Up, Engages At About 170 Degrees Radiator Air Temperature About 30 Degrees Lower Than Coolant Temperature, With Hayden's Limited 5-Year Warranty"
they are not talking about the FAN being engaged .they are saying the CLUTCH is engaged which means the fan will not spin.
Burning Brakes
Joined: Apr 2008
Posts: 945
Likes: 1
o.k. thanks guys. So when a clutch is "engaged" the fan doesn't run but when it's "disengaged" the fan turns. 
It still seems backwards to me but as long as I understand I'm o.k. So if my drivetrain clutch is "engaged" my foot is depressed on the clutch pedal? Hmm... I certainly don't want my fan spinning upwards of 5,000 rpm +.
It still seems backwards to me but as long as I understand I'm o.k. So if my drivetrain clutch is "engaged" my foot is depressed on the clutch pedal? Hmm... I certainly don't want my fan spinning upwards of 5,000 rpm +.
Safety Car
Joined: Oct 2004
Posts: 3,725
Likes: 5
From: Minnesota
o.k. thanks guys. So when a clutch is "engaged" the fan doesn't run but when it's "disengaged" the fan turns.
It still seems backwards to me but as long as I understand I'm o.k. So if my drivetrain clutch is "engaged" my foot is depressed on the clutch pedal? Hmm... I certainly don't want my fan spinning upwards of 5,000 rpm +.
It still seems backwards to me but as long as I understand I'm o.k. So if my drivetrain clutch is "engaged" my foot is depressed on the clutch pedal? Hmm... I certainly don't want my fan spinning upwards of 5,000 rpm +.
2.Motor off, clutch engaged=fan doesn't (unless you make it slip on the belt)
With the motor off the fan should turn with minor resistance. As the engine heats up the "thermostat" in the clutch will engage to make the fan move more air. Hope this helps.
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Burning Brakes
Joined: Apr 2008
Posts: 945
Likes: 1
Mike, I was quoting Gingerbread Man.
Now that I'm getting opposite input I'm still confused. I just want the fan to turn when the car is at idle or very low rpm and not turn when the engine is up in speed during cruise and acceleration.
My logic tells me that "engaged" means the clutch is engaged, the fan is turning but that doesn't seem to be what the Hayden ad is saying.
Now that I'm getting opposite input I'm still confused. I just want the fan to turn when the car is at idle or very low rpm and not turn when the engine is up in speed during cruise and acceleration.
My logic tells me that "engaged" means the clutch is engaged, the fan is turning but that doesn't seem to be what the Hayden ad is saying.
Melting Slicks
Joined: Oct 2006
Posts: 2,417
Likes: 336
From: Texas
Engaged High Speed Operation Provides Maximum Cooling, Disengaged Low Speed Operation Provides Fuel Savings And Noise Reduction, Offers Greater Life Expectancy Than A Non-Thermal Clutch, Briefly Engaged At Cold Start-Up, Engages At About 170 Degrees Radiator Air Temperature About 30 Degrees Lower Than Coolant Temperature,
i think hayden is saying WHEN the fan clutch is engaged the FAN is at high speed , WHEN the fan clutch is disengaged it (the fan) is at a low speed operation. i dont think theyre talking about the speed of the car.
i have the same one (hayden thermal severe duty) on mine and it works fine.
i think hayden is saying WHEN the fan clutch is engaged the FAN is at high speed , WHEN the fan clutch is disengaged it (the fan) is at a low speed operation. i dont think theyre talking about the speed of the car.
i have the same one (hayden thermal severe duty) on mine and it works fine.
Last edited by speedreed8; Jan 9, 2009 at 08:17 PM.
Pro
Joined: Jun 2008
Posts: 673
Likes: 2
From: Melbourne Victoria
Don't worry about the science -THEY WORK.
The way it was explained to me was..
"It is always turning -
Engine turns fan at lower engine speeds,
Fan freewheels at higher engine speeds".
CHEERS
GAV
The way it was explained to me was..
"It is always turning -
Engine turns fan at lower engine speeds,
Fan freewheels at higher engine speeds".
CHEERS
GAV
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
That's it.
