Ambient temperature effect on ECT-EOT spread
Fleet Mechanic
Joined: Nov 2012
Posts: 1,348
Likes: 110
From: Lakeland, Fl
I was impressed with the quality of the analyses and writing in this thread. There is not a lot of this quality circulating in the world these days either verbal, written or twitted.
That said, I find that with 100K on my truck, I get in the range of 190 - 192 F
ECT vs 199 - 203 F EOT at 65 mph on the flats unladened after the truck is run about 10 - 15 miles. That makes the delta between 9 - 13 F with most of the time falling between 11- 13 F. This delta has been consistent since I bought a Scan Gauge in 2010.
I would be concerned about your hot ambient temperature of 192 F ECT vs 211-215 F ECT which is a delta of 19-23 F.
Was the systems flushed when you replaced the oil cooler? Are you measuring the temperatures with the truck unladened? Have you looked at the bypass filter to see if there are any particulates in it? Good luck and post back with your results.
That said, I find that with 100K on my truck, I get in the range of 190 - 192 F
ECT vs 199 - 203 F EOT at 65 mph on the flats unladened after the truck is run about 10 - 15 miles. That makes the delta between 9 - 13 F with most of the time falling between 11- 13 F. This delta has been consistent since I bought a Scan Gauge in 2010.
I would be concerned about your hot ambient temperature of 192 F ECT vs 211-215 F ECT which is a delta of 19-23 F.
Was the systems flushed when you replaced the oil cooler? Are you measuring the temperatures with the truck unladened? Have you looked at the bypass filter to see if there are any particulates in it? Good luck and post back with your results.
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Mountain Pass
Joined: May 2015
Posts: 128
Likes: 8
From: Cottonwood, California
Akblackfoot....
Good point, maybe what I am really referring to is the air flow at ambient temperatures.
When it is 90+ degrees outside a lot more hot air is being spread across the engine compartment than when the temperatures are cooler.
I wonder how much of an effect the cooler outside air has, in regards to oil temp readings, when it is spreading across the engine.
Good point, maybe what I am really referring to is the air flow at ambient temperatures.
When it is 90+ degrees outside a lot more hot air is being spread across the engine compartment than when the temperatures are cooler.
I wonder how much of an effect the cooler outside air has, in regards to oil temp readings, when it is spreading across the engine.
Hotshot
Joined: Dec 2014
Posts: 17,829
Likes: 3,114
From: Jersey Shore
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Gatordog
1999 - 2003 7.3L Power Stroke Diesel
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Oct 21, 2015 10:06 AM
