Changed the oil temp sensor out. Dropped the delta by 2 degrees. I was seeig a 2 *F offset in the mornings at KOEO.

Looks like the delta is around 5*F

(I know, I know - pretty frivolous thread ............)

 

That's good to know. I've often wondered about the accuracy of sensors that have been in use for any length of time. Picking up on that offset was a good spot.

 

I swaped both sensors oil to coolant, coolant to oil - no change - fWT: 188* EOT: 212
Bought new sensors from Tousley Ford, put new one in - no change - fWt: 188* EOT: 212*.

This is all after flush and fill, added coolant filter, new thermostat. Guess I need to do a reverse flush to the oil cooler and hope it will unclogged.

 

I don't think it's frivolous. I think people getting stressed and wanting to change their oil coolers at exactly 15* delta is frivolous when their max oil temp only goes to 205 or 210--LOL.

 

Hell yea you are so right , people see 16 diff and go all to hell.

 

My EOT is +2 after sitting over night, KOEO. The delta is well within limits; so I don't worry about the +2.

I'm retired (my bride says retarded) so it gives me something to do.

 

I wasn't worried either - just curious and like working on the truck - (except I should have let the engine cool down first- lol)!

Main thing I was interested in was whether or not the delta was 2 degrees across the range of the sensor of if it was only at the lower end. It appears it was the same off-set across the range of the sensor.

 

+2 across the board is what I'm guessing. But, that is what I ASSUME, and everyone knows what that means.

I know that it's not logical; but if I can convince myself that my delta is really 2* less spread than the CTS indicates, I feel sooo much better. My wife has oppinion about that little personality quirk also.

 

So when should people really get worried about the whole Delta Issue? I was towing my tractor yesterday and had 210 ECT and 220 EOT pulling 10k and i dont sweat it....lol

 

The 15* split is a diagnostic data point to judge oil cooler plugging. Holding 65mph on flat land for at least a mile or five usually gets the temps to stop chasing each other around and let's you make a guesstimate about how the oil cooler is functioning.

When towing, pulling up and down hills, inching along in traffic, for stuff like that it's really not as relevant of a data point.

 

I just installed new IPR, after 15-20 mins of idle my ECT-178, my EOT-166. Before the change it was 5-15 degrees with the oil higher than coolant. Of course, I also put new t-stat in because ECT would not go higher that 168.
Thanks and God bless

 

Takes my truck 15 to 20 miles to totally heat saturate and all temps to normalize. I don't believe 1 to 5 miles will give you an accurate delta. And yes it has to be on level ground. Mine works in that scenario empty or towing.

 

Should have put "after up to temp of ~190*" before the one to five miles to let the temps stop chasing each other. those distances were just because short flats between hills aren't enough to get the temps evened out, the readings have to be taken on flat ground after awhile on flat ground.

 

[quote=texastech_diesel;11661481]The 15* split is a diagnostic data point to judge oil cooler plugging. quote]

Bingo... It's a method to determine when it's time to replace the oil cooler before catastrophic failure occurrs.

 

Ok im on my first ever diesel. I have been learning more every day but still a long way to go. First off I have to guess a WHOLE lot. Sure your old pros know what a DELTA is. Ok Is the Delta the difference between ECT Engine Coolant Temp and EOT Engine Oil temperature. I just bought a Scan gauge today, and so far have figured out how to set the custom gauge to monitor one function, that being the voltage of the FICM Fuel Injector Control module. Tomorrow I will tune the Scanguage to monitor EOT.. The factory setting on the SGII had a gauge set for ECT. So now the question. I am supposed to watch the the coolant and the oil temps stay in the under 15 degree spread. Can the oil and the coolant in a perfect system be the same temperature. Would this not be a perfect thing.
I learned enough on this forum that when my warranty ended I went directly to a shop and had an EGR delete installed along with a brand new factory Ford cooler. I also self installed a Sinister coolant filter. Also self installed a GlowShift set of triple gauges to monitor Exhaust Gas Temp, Boost and rad coolant temp. Cost for the installs was under 1800 bucks. Money well spent I tell myself. Am I on the right track to owning a trouble free Ford?