Coolant Temperatue affected by Air Temp? - Ford Powerstroke Diesel Forum
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Old 10-26-2010, 08:52 AM
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Coolant Temperatue affected by Air Temp?

I'm kind of wondering if the coolant temperature is affected overall by what the temperature of the air is outside?

Here is why I'm asking, my oil temp and coolant temp have usually about 6 - 9 degrees of difference. I run a Evolution for gauges only!!! Then when I'm on the highway the difference goes up to about 11 degrees. I know and have read what it should around 5 depending on what you are doing. My driving is mostly crusing and not pulling anything.

Would the temp of the air affect the coolant temp? I also have a zoodad mode on my truck also. Before I go ripping into my truck, just want to cover the basics. Did the zoodad mode before I had guages, so not really sure what the temp was before the mod, and if it really does affect the temp.

My temps hardly ever get above 200*, and if they do it's not for long.

Thanks for the feedback.
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Old 10-26-2010, 09:38 AM
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Your temps might be slightly high but you are still in the normal zone. The temp delta that says rebuild the oil cooler is 15 degrees. Just keep an eye on it and if the delta keeps increasing plan for an oil cooler rebuild when it gets over 15.
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Old 10-26-2010, 09:39 AM
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Quote:
Originally Posted by Switchrider900 View Post
I'm kind of wondering if the coolant temperature is affected overall by what the temperature of the air is outside?

Here is why I'm asking, my oil temp and coolant temp have usually about 6 - 9 degrees of difference. I run a Evolution for gauges only!!! Then when I'm on the highway the difference goes up to about 11 degrees. I know and have read what it should around 5 depending on what you are doing. My driving is mostly crusing and not pulling anything.

Would the temp of the air affect the coolant temp? I also have a zoodad mode on my truck also. Before I go ripping into my truck, just want to cover the basics. Did the zoodad mode before I had guages, so not really sure what the temp was before the mod, and if it really does affect the temp.

My temps hardly ever get above 200*, and if they do it's not for long.

Thanks for the feedback.
Yes it will. While driving on a trip on the highway I noticed an increase of 10* in ECT / 1* of IAT increase.
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Old 10-27-2010, 12:23 PM
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I use a Aeroforce Gauge to read IAT1/IAT2 and ECT. I have the digital AC control that shows what the trucks reads as OAT.

If you consider they share OAT as an constant the following must be true.. Low OAT will contribue to low IAT1/IAT2 readings as well as ECT readings. IAT1/IAT2 temps will not effect the ECT readings nor will ECT effect IAT1/IAT2 readings.

I disagree that you will have LOWER ECT/EOT temps on the HWY since the truck is running harder.

Yes OAT will effect ECT. Cooler OAT will lower ECT as well as higher OAT will increase the ECT. I find OAT around 50*F will keep my ECT well below 190*F routinely, OAT over 90*F will keep my ECT over 195*F.
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