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Old 06-22-2019, 08:21 AM   #1
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V10 Fans Kicking On

Hi,

I have a 2019 FR3 and yesterday I was driving across Texas from Waco to Amarillo. Temps averaged 92-102 degrees according to my phone. During the trip the fans were kicking on but the temp gauge never moved. I was surprised they were kicking on? I know it was hot but I was continually moving so I figured that the engine was getting enough air though it?

Is this anything that I should be concerned with? I try to not drive when it is too hot but yesterday was unavoidable.

Also...this is my first V10. I seem to get a little black soot in the mornings when warming the engine in the condensation/water out of the exhaust. Is it running to rich, normal business, etc.?

Thanks in advance!
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Old 06-22-2019, 01:24 PM   #2
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If no check engine light, all is ok, it's normal for Ford v10's to cycle the clutch fans at any temp over 90+ ambient, the reason you dont see the temp gauge rise is that the clutch fan is designed with a bimetal valve, as the air coming through the radiator reaches a certain temp ( somewhere around 205f) the bimetal valve closes and locks up the fan clutch,as the air drops back to 195 or so the valve reverses and fan clutch will slip increasing mpg, it's all done mechanically the fan is not electric, or you may have the newer "vistronic" clutch which is monitored by the engine ecu. That fan clutch has a wire harness attached to it, hope this helps
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Old 06-22-2019, 01:38 PM   #3
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I compared my dash gauge to my Scan Guage 2 on my way up from FL.

While the dash gauge stayed in the center, my Scan Gauge was moving between 195 and 207.
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Old 06-22-2019, 03:24 PM   #4
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my f53 v10 gauges never move, cold or hot. I’m beginning to think they are dummy lights in disguise! (it was 74 in Amarillo today when we arrived at noon, where’s my sweatshirt!!!)
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Old 06-22-2019, 05:58 PM   #5
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"Dummy lights in disguise" is a good way to put it. I have not seen a real temp gage in a factory gage cluster that I can recall. The way I heard it was that people would notice a real gage moving up and down with conditions and they would pester their dealer about it. "how low is too low? How high is too high? Is there a problem?"
As a result, gage behavior was changed and is not linear AT ALL. Cold is all the way down, medium-regular-hot is a spot right in the center, and overheat is up in the red. Scangage etc. users can verify this.
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Old 06-22-2019, 06:24 PM   #6
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This is my dash gauge. There is only a 50F degree difference between 210-260.


When moving down the highway on a 70F or so day it will always fluctuate between just left of 210 to slightly right (half needle width) of 210F.


On a warmer day same thing.


Once in traffic it will generally sit where you see it or slightly more to the center of the gray bar (right side).


This is normal behavior on the P30 chassis. The temp reading was taken right at the T stat housing. My scan gauge is always lower temp reading than the dash gauge.
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Old 06-22-2019, 06:44 PM   #7
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The gauge is designed to stay in one place during normal operating temperatures, which are actually fluctuating. The needle will start moving up again if you are hotter than this range. The fans will come on to keep the temperature within the proper range and the needle won't move.


There is a curve that shows the needle location vs. temperature but I can't seem to find it.
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