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Old 07-09-2008
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Manual Cooling Fan

This may be a dumb question but I own a 2.3L 97 ranger, the cooling fan which is attached to the h2o pump is on all the time. I was thinking there is a clutch on the fan assembly which would engage only when needed. Am I wrong here or what ? Perhaps when the clutch isnt engaged the fan spins freely and when it does it spins faster !!!!

thanks !!!
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Old 07-09-2008
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All newer cars with a mechanical fan have a fan clutch. The fan itself spins all the time but only at full speed when needed. Your fan clutch might be seized. Can you spin the fan by hand when the engine is off?
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Old 07-09-2008
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Originally Posted by fddriver02 View Post
All newer cars with a mechanical fan have a fan clutch. The fan itself spins all the time but only at full speed when needed. Your fan clutch might be seized. Can you spin the fan by hand when the engine is off?
yes, it spins fine when the engine is off.
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Old 07-09-2008
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Quote:
Originally Posted by 97whitexlt View Post
This may be a dumb question but I own a 2.3L 97 ranger, the cooling fan which is attached to the h2o pump is on all the time. I was thinking there is a clutch on the fan assembly which would engage only when needed. Am I wrong here or what ? Perhaps when the clutch isnt engaged the fan spins freely and when it does it spins faster !!!!

thanks !!!
the way a clutch fan works, is that when theres no air flow coming through the rad(at a stop revving the engine) the fan will always spin, however, at speed the force on the fan causes the clutch to relase and slip, making the fan not spine and instead uses the rushing air through the radiator to keep it cool.....
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Old 07-10-2008
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Originally Posted by mhughes165 View Post
the way a clutch fan works, is that when theres no air flow coming through the rad(at a stop revving the engine) the fan will always spin, however, at speed the force on the fan causes the clutch to relase and slip, making the fan not spine and instead uses the rushing air through the radiator to keep it cool.....
Not exactly correct. There are two types of mechanical fan clutches, one disengages the fan at high RPMs, and the other engages the fan at higher temps:

http://www.haydenauto.com/installati...tutorial-1.htm
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Old 07-10-2008
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This is what he needs and the price is right !
http://syracuse.craigslist.org/pts/749044543.html



Easy Bob ,just being a little sarcastic today.
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Old 07-10-2008
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Originally Posted by Takeda View Post
Not exactly correct. There are two types of mechanical fan clutches, one disengages the fan at high RPMs, and the other engages the fan at higher temps:

http://www.haydenauto.com/installati...tutorial-1.htm
but, your post doesnt mean anything because it isnt relavant to the topic at hand, just you having to be right, if u can show me a ranger with a mechanical fan that engages at higher rpms then maybe you will be right.
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Old 07-10-2008
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Originally Posted by mhughes165 View Post
but, your post doesnt mean anything because it isnt relavant to the topic at hand, just you having to be right, if u can show me a ranger with a mechanical fan that engages at higher rpms then maybe you will be right.

Why don't you show us a mechanical fan clutch that engages with the absence of airflow!!
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