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Replacing Fan Clutch F-150 w/5.0

Tiny
ACESHIGH717
  • MEMBER
  • 1994 FORD F-150
  • 142,000 MILES
What does replacing the fan clutch do for and to the engine? What can I expect differently? I have noticed a few things since mine was replaced last week. Higher idle at times, higher rpm in first gear, longer for auto trans to shift and alot more noise, like there is 4 fans. Also had water pump replaced, lower hose, bypass hose and oil pan gasket.
Thanks for anything.
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Monday, July 2nd, 2012 AT 10:03 PM

10 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If your old fan clutch was bad with the new one you will hear more noise because the old one wasnt blowing enough air. So now you really hear it blowing the air like it should.
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Monday, July 2nd, 2012 AT 10:30 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Basicially the old fan wasnt engaging and blowing the correct amount of air so you will hear the difference. Even when the clutch isnt engage you will hear more air blow then the old one. It may sound like its idling higher because of the increased noise from the air increase of the new fan clutch. Does the actual tach reader higher rpms at idle?Also could effect shift points because the new fan clutch working correctly will put more of a load on the engine then the old worn out one.
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Monday, July 2nd, 2012 AT 10:36 PM
Tiny
ACESHIGH717
  • MEMBER
  • 24 POSTS
My truck does not have a tach. I checked online again and found out it is a severe duty clutch. That is what all places offer for this vehicle. I don't know what type clutch was taken off. Tuesday, I was leaving a place, gunned it to beat traffic and the truck would barely move, like all power was gone. That never happened before. It would get up and move. Today I left the same place alot slower and had to let off the pedal so the transmission would change gears. Would a standard clutch or even a flex fan be better?
Thanks in advance!
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Thursday, July 5th, 2012 AT 5:25 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Usually when you have to let off the gas for the transmission to shift that is a sign of a plugged cat. So when the is cold with the engine off. Is the fan clutch locked?
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Friday, July 6th, 2012 AT 5:07 AM
Tiny
ACESHIGH717
  • MEMBER
  • 24 POSTS
I checked the fan yesterday morning before I went anywhere. It did turn but not freely. I checked it again when I got home and it turned the same way.
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Friday, July 6th, 2012 AT 9:42 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
When its cold it should turn with some resistance but not totally locked up. Was it it totally locked up?
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Friday, July 6th, 2012 AT 4:28 PM
Tiny
ACESHIGH717
  • MEMBER
  • 24 POSTS
Had some resistance. No free spin and not locked up. Maybe it is doing what it is suppose to. I have had the truck since 2003 and used to the way the old one was operating.
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Friday, July 6th, 2012 AT 8:49 PM
Tiny
SATURNTECH9
  • MECHANIC
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If the truck is barely moving thats not normal something is wrong. Plugged cat bad fan clutch maybe. Any codes in the computer?
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Saturday, July 7th, 2012 AT 6:43 AM
Tiny
ACESHIGH717
  • MEMBER
  • 24 POSTS
Have not done a self test for codes. I am not familiar with this on my vehicle. Trying to find out more about it.
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Sunday, July 8th, 2012 AT 9:27 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Did you find out how to do the self check yet?Did you get a back pressure test down yet?Doe you think the new fan clutch is dragging the power of the engine down?
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Tuesday, July 10th, 2012 AT 12:30 AM

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