Once again, EOT/ECT delta after EGR and oil cooler - Ford Powerstroke Diesel Forum
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Old 12-31-2011, 06:50 AM
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Once again, EOT/ECT delta after EGR and oil cooler

I know this was just discussed but I figured I would start a new thread hoping for more input. I got mine back after doing the EGR delete, new oil cooler and studs and my delta is a steady 7 all the way up to 10. Is this something to be concerned about? The ECT holds steady at 190 it is the EOT that fluctuates.
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Old 12-31-2011, 08:00 AM
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There are many elements that cause fluctuation of the temperature for both ECT and EOT. Coolant temperature is ordinarily more variable than oil as the radiator has a much larger heat transfer surface. If the oil temperature is varying more, I would say that is an indicator of a good oil cooler.

Lower ambient air temperatures may make the ECT EOT delta larger than during moderate ambient air temperatures. Your 7-10 degree delta is within the operational range.

Enjoy your upgrades.

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