EOT vs. ECT after EGR delete??
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Junior User
Joined: Jun 2015
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EOT vs. ECT after EGR delete??
Doing the EGR delete and oil cooler replacement along with EC-1 rated coolant today (and maybe tomorrow and the next day too) but looking ahead,,,,,how do you monitor the oil cooler health after this is all done? Will there still be a temperature differential. System was flushed with Restore and Restore Plus and flushed for several hours with tap water then refilled and drained a couple more times with distilled water. That should have removed the garbage but you never know....
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Junior User
Joined: Jun 2015
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Thanks. Appreciate the quick response. Using the OEM cooler, River City delete with solid up-pipe and I'm going to replace the STC fitting with updated fitting along with turbo drain and supply lines. Busy day(s) ahead.
Laughing Gas
Joined: Sep 2013
Posts: 1,031
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The difference is that the deltas aren't as important as they were before. The 15 degree limit was to protect the egr cooler from rupturing in the event of an oil cooler coolant side blockage.
Honestly, just keep your oil temps below 250 and you'll be fine. When I tow in excess of 13k I see oil temps creep to around 235 and sometimes up to 240 on grades with a brand new ford oil cooler, and egr delete. As soon as I stop or are coasting, the cooler cools the oil back down quickly.
I've never really trusted delta readings anyway. There are so many factors that can affect the result of the delta reading. This model has many different configurations, and they all weigh different and have different drag coefficients. Even such things as OAT winds and even fuel level can affect the outcome of the delta readings. I've changed oil coolers on trucks that had 15+ deltas and when I cut them open, they were perfectly clean and left with 15 degree deltas. Hell, my 2005 CCLB DRW 4x4 has a normal 12 degree delta right now and it has a new radiator, cooling fan, oil cooler, water pump and everything has been cleaned with VC-9 and it has ELC coolant. My friend has a 2005 F250, 4x4 SCLB SRW that has 8 degree deltas and his still has EGR. I'm telling you, they are all different according to configuration and curb weight.
Honestly, just keep your oil temps below 250 and you'll be fine. When I tow in excess of 13k I see oil temps creep to around 235 and sometimes up to 240 on grades with a brand new ford oil cooler, and egr delete. As soon as I stop or are coasting, the cooler cools the oil back down quickly.
I've never really trusted delta readings anyway. There are so many factors that can affect the result of the delta reading. This model has many different configurations, and they all weigh different and have different drag coefficients. Even such things as OAT winds and even fuel level can affect the outcome of the delta readings. I've changed oil coolers on trucks that had 15+ deltas and when I cut them open, they were perfectly clean and left with 15 degree deltas. Hell, my 2005 CCLB DRW 4x4 has a normal 12 degree delta right now and it has a new radiator, cooling fan, oil cooler, water pump and everything has been cleaned with VC-9 and it has ELC coolant. My friend has a 2005 F250, 4x4 SCLB SRW that has 8 degree deltas and his still has EGR. I'm telling you, they are all different according to configuration and curb weight.
Fleet Owner
Joined: Nov 2003
Posts: 27,922
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IMO 250 degree oil temp is too high.
The oil in the pan is 40 degrees hotter than the EOT reading. It can get higher than that in various parts of the engine.
I would think that 220, maybe with an occasional 230 when towing heavy up a steep grade, would be more advisable.
No doubt some engines just run hotter, but that doesn't make it a good thing!
As suggested though - get to know what is normal for your engine/truck and if you see it changing, then you can decide what to do at that point.
The oil in the pan is 40 degrees hotter than the EOT reading. It can get higher than that in various parts of the engine.
I would think that 220, maybe with an occasional 230 when towing heavy up a steep grade, would be more advisable.
No doubt some engines just run hotter, but that doesn't make it a good thing!
As suggested though - get to know what is normal for your engine/truck and if you see it changing, then you can decide what to do at that point.
Fleet Mechanic
Joined: May 2011
Posts: 1,866
Likes: 84
From: Rainier OR
The difference is that the deltas aren't as important as they were before. The 15 degree limit was to protect the egr cooler from rupturing in the event of an oil cooler coolant side blockage.
Honestly, just keep your oil temps below 250 and you'll be fine. When I tow in excess of 13k I see oil temps creep to around 235 and sometimes up to 240 on grades with a brand new ford oil cooler, and egr delete. As soon as I stop or are coasting, the cooler cools the oil back down quickly.
I've never really trusted delta readings anyway. There are so many factors that can affect the result of the delta reading. This model has many different configurations, and they all weigh different and have different drag coefficients. Even such things as OAT winds and even fuel level can affect the outcome of the delta readings. I've changed oil coolers on trucks that had 15+ deltas and when I cut them open, they were perfectly clean and left with 15 degree deltas. Hell, my 2005 CCLB DRW 4x4 has a normal 12 degree delta right now and it has a new radiator, cooling fan, oil cooler, water pump and everything has been cleaned with VC-9 and it has ELC coolant. My friend has a 2005 F250, 4x4 SCLB SRW that has 8 degree deltas and his still has EGR. I'm telling you, they are all different according to configuration and curb weight.
Honestly, just keep your oil temps below 250 and you'll be fine. When I tow in excess of 13k I see oil temps creep to around 235 and sometimes up to 240 on grades with a brand new ford oil cooler, and egr delete. As soon as I stop or are coasting, the cooler cools the oil back down quickly.
I've never really trusted delta readings anyway. There are so many factors that can affect the result of the delta reading. This model has many different configurations, and they all weigh different and have different drag coefficients. Even such things as OAT winds and even fuel level can affect the outcome of the delta readings. I've changed oil coolers on trucks that had 15+ deltas and when I cut them open, they were perfectly clean and left with 15 degree deltas. Hell, my 2005 CCLB DRW 4x4 has a normal 12 degree delta right now and it has a new radiator, cooling fan, oil cooler, water pump and everything has been cleaned with VC-9 and it has ELC coolant. My friend has a 2005 F250, 4x4 SCLB SRW that has 8 degree deltas and his still has EGR. I'm telling you, they are all different according to configuration and curb weight.
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