Outside air temp really affects your ECT and EOT Delta... - Ford Powerstroke Diesel Forum
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post #1 of 24 Old 04-03-2011, 03:18 PM Thread Starter
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Outside air temp really affects your ECT and EOT Delta...

Just took the Ex on vacation and all my temps have been fine. Delta hovering around 8 degrees. Well.. I got into the warmer Florida weather and my delta started fluctuating from 8-15 degrees. It would never hold steady at 15 degrees, but non-the-less, it got there. The most I saw was EOT of 216 and ECT of 201. I wasnt towing anything, but had 5 adults, 2 kids, baggage and full tank of fuel. Should I look into rebuilding the oil cooler and flushing the old coolant out? The prev owner replaced the oil cooler and EGR cooler with OEM Ford stuff about 2 years ago..
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post #2 of 24 Old 04-03-2011, 04:45 PM
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I would be interested to know the answer to this as well because I live in Willamette Valley and the temperature here has been in the mid 40's. Friday mother nature decided to throw us a 70 degree day and my temps went up a bit. Typically my eot has been 192 and ect was 188. When the temperature outside went up I was running an eot of 198 and ect of 192. Granted i was crusing at 70 mph but kind of curious to know.

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post #3 of 24 Old 04-03-2011, 05:20 PM
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interested as well.

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post #4 of 24 Old 04-03-2011, 05:33 PM
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Originally Posted by Woodsracer View Post
Just took the Ex on vacation and all my temps have been fine. Delta hovering around 8 degrees. Well.. I got into the warmer Florida weather and my delta started fluctuating from 8-15 degrees. It would never hold steady at 15 degrees, but non-the-less, it got there. The most I saw was EOT of 216 and ECT of 201. I wasnt towing anything, but had 5 adults, 2 kids, baggage and full tank of fuel. Should I look into rebuilding the oil cooler and flushing the old coolant out? The prev owner replaced the oil cooler and EGR cooler with OEM Ford stuff about 2 years ago..

Well, you were loaded pretty good. I'm not sure you are having an issue. Might want to think about when you get home and flush your system and change coolant. Take it for a spin with just you in it. See how it reads.

Here is a good link to read when you have a chance.

Replaced oil cooler still difference in temps
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post #5 of 24 Old 04-03-2011, 05:35 PM
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Originally Posted by 96stroker19 View Post
I would be interested to know the answer to this as well because I live in Willamette Valley and the temperature here has been in the mid 40's. Friday mother nature decided to throw us a 70 degree day and my temps went up a bit. Typically my eot has been 192 and ect was 188. When the temperature outside went up I was running an eot of 198 and ect of 192. Granted i was crusing at 70 mph but kind of curious to know.
Yours looks fine. 6* spread?

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post #6 of 24 Old 04-03-2011, 08:11 PM
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This may help or may not.

I live in West Texas. Before this week and throughout the winter my ECT and EOT would be around 192 and 196. They never got much more spread than that.

These past two days its been 100 degrees and the the CS shows consistent temps of 210 and 215 for the ECT and EOT.

So I would say the outside temp does not increase the delta T but just increases the actual temp values.

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post #7 of 24 Old 04-04-2011, 02:42 AM
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Originally Posted by Shane3507 View Post
This may help or may not.

I live in West Texas. Before this week and throughout the winter my ECT and EOT would be around 192 and 196. They never got much more spread than that.

These past two days its been 100 degrees and the the CS shows consistent temps of 210 and 215 for the ECT and EOT.

So I would say the outside temp does not increase the delta T but just increases the actual temp values.

Wow, my truck never runs that hot even with it 100* out. Is your fan kicking on?
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post #8 of 24 Old 04-04-2011, 05:40 AM
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Wow, my truck never runs that hot even with it 100* out. Is your fan kicking on?

I thought that was too damn hot. I hadn't had my CS in in the summer time though so I was sure. How would I got about checking that my fan was kicking on?

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post #9 of 24 Old 04-04-2011, 05:42 AM
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You'll hear it. That sucker is loud!
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post #10 of 24 Old 04-04-2011, 05:55 AM
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Originally Posted by PGreenSVT View Post
You'll hear it. That sucker is loud!
Ha, so you could hear hit while driving 70 MPH down the highway?

If so, I don't think I have ever heard it. BTW, I didn't mention I was driving into a 50 MPH wind. I may take it to the dealer today and have them check the fan out. I think my warranty is up this month sometime.

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