Fan RPM? - Ford Powerstroke Diesel Forum
 
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post #1 of 9 Old 08-20-2013, 04:04 AM Thread Starter
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Fan RPM?

So, my Ex was running pretty smoothly.. (by was I mean is) but fuel efficiency doesn't seem to be that great. While screwing around with the torque app i saw that the fan was spinning at XXX RPMs even though the engine temps were only around 190 or so. Is this normal? At what temps should I expect the fans to kick on? My engine temps are always between 190-210.. Is that too high? i thought those were normal temps, but if not I'll probably need some coolant in there somewhere.

Just curious.. Thanks and sorry for the typical newb questions.
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post #2 of 9 Old 08-20-2013, 04:31 AM
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My fan dosnt kick on until around 230* if I remember correctly.

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post #3 of 9 Old 08-20-2013, 04:46 AM Thread Starter
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Originally Posted by kinnisoj View Post
My fan dosnt kick on until around 230* if I remember correctly.
My fan speed sensor was showing 450rpm while my engine coolant and oil temp was at 140 today.
Should I replace something?

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post #4 of 9 Old 08-20-2013, 04:57 AM
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I read that the snow plow packaged fan clutch always runs at 25%. So no I wouldnt worrie about it. Heck Im spending $$$ so mine will act like yours!

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post #5 of 9 Old 08-20-2013, 05:32 AM Thread Starter
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I don't use a plow though.. My truck is only 2wd, so I don't think I'll ever have a need for the fan to be engaged at all times. Does't this just hinder fuel efficiency? I'm thinking it would.
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post #6 of 9 Old 08-20-2013, 06:29 AM
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The 6.0 clutchfan never completely stops it freewheels when not actively engaged.
This produces negligeable drag on the motor.


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post #7 of 9 Old 08-20-2013, 06:31 AM
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My fan actully spins all the time as well. But alot of my issues is the worn out clutch fan.
Id say as long as your not hearing the fan when your driving Id say your fine, Im sure youll get a few other opinon's.

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post #8 of 9 Old 08-20-2013, 06:36 AM Thread Starter
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Originally Posted by dannyboy950 View Post
The 6.0 clutchfan never completely stops it freewheels when not actively engaged.
This produces negligeable drag on the motor.
OK, so the 400-650RPM is normal you're saying? This seems high to me, but I don't know enough about the engine. My biggest concern is fuel efficiency, as I've stated before. I was getting 20MPG doing 60-65MPH on flat ground and 8 or so on the same trip doing the same speeds while towing a 7000lbs trailer.
Does that seem right? To me that tow MPG seems like what I would get with a V10, not the 6.0
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post #9 of 9 Old 08-24-2013, 05:39 AM
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When my truck first starts up the fan will spin approx. 180-230 RPM, when driving down the road it will spin faster (300-600 RPM) as the speed increases due to the air passing over the blades. When the engine is hot, AC on and I'm sitting in traffic I will see the fan speed up like it should approx. 800-1200 RPM.

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