Well just recently picked up an Edge Insight and hooked her up and started monitoring away. I quickly noticed a spread of close to 15 degrees only when the truck is not warmed up. It seems like it takes a little longer for the oil temp to reach the ect. By the time ECT reaches 190 its always less than a 7 degree spread. And driving it around town and highway it never goes above 7 degrees. I'm assuming this is ok??
Thanks for your input.

 

With the Scangauge II, I will see 3-7 degrees difference in ECT/EOT while driving around town. Now when I'm pulling 8000# up a grade, I will see a spread of around 10-15.

The longer I watch the temps, the more I'm learning the spreads and factors during all operations. I saw at times the dreaded 15 degree difference, but have learned how quickly the cooling system on these trucks will drop ECT and show a large spread.

At first I was concerned, now I'm informed.

Your temp spreads look good to me. (as compared to what I'm seeing)

 

Thank you, I haven't even towed with the Insight hooked up. I only see these numbers it seems when oil temps warming up...

 

It's not a problem when warming up, EOT is going to be less. After everything is warmed up, your EOT will be higher than ECT. Your numbers sound fine. You didn't mention the mileage, but as a recommendation if you haven't changed your coolant you should do it. Putting in a coolant filter will also help remove impurities from your coolant. Changing your coolant cost less than an oil change and it is EVERY bit as important. I think that the owners manual is very wrong, 100,000 miles is WAY too long to wait. I am planning every 30,000 or 2 years, I really don't want to put in a third oil cooler.

 

Thank you, I'm currently at 66k miles no coolant filter (I know its cheap insurance) I flush my coolant every year (about 10k). Man 2 oil coolers?? How many miles on your truck?

 

I have 107,000 miles on the truck now. I don't think that my coolant was ever changed or flushed, I bought it with 87,000. When I changed my first oil cooler at 101,000 I followed what I thought was Ford's recommendation. I changed the cooler then flushed with VC-9 when everything was complete. I think that caused things to loosen up to the point that it very quickly reclogged my oil cooler. I had installed my coolant filter immediately after the first oil cooler replacement. Doing it the second time, I of course had the filter helping, but I completely flushed BEFORE taking anything apart then didn't flush after and it seems to have worked much better now.

You changing your coolant once a year has probably saved you from having to replace your cooler, and it makes VERY good sense. I was planning on every 30,000 or 2 years, but I like your once a year thing better.

Oh, mine is a 2003.

 

I fiqure since I dont have a filter, I would flush
once a year and like you said it is cheaper and easier than an oil change. Only time will tell for sure how effective my pratice will be. I need to log more miles.

 

rather than start a new topic, i thought I'd ask here, because my questions are about ECT vs EOT. I've recently had 3-4 episodes of coolant puke from the resevoir. I have ARP headstuds, Sinister EGR delete, coolant filter, 4" exhaust (no kitty), and SCT tunes from Innovative. I run Extreme tune, but drive easy. I just removed my coolant filter and replaced with new one.

So I replaced my resevoir cap 2 days ago and also added some Ford VC-8 additive. The additive was to help balance my coolant, as I'd accidentally added green coolant and then some water (maybe 1/2 gallon of green). The Ford mechanic said the additive would balance the PH and this way I don't have to entirely flush coolant (it was JUST flushed).

So I started to watch my EOT & ECT temps the past few days. The first day, my coolant was 200* and my oil was 186*. YEP, oil cooler than coolant. Yesterday they were both in the mid 190s, and i had another small puke. I think oil was a couple degrees hotter, like 196 and coolant was 194. Both readings were after driving truck awhile and it was fully warmed up. Truck empty, flat driving. Are these normal temps?

From what i've read, it seems under normal circumstances my oil should be hotter than my coolant, but within 7 degrees. so why did i puke again, especially when both were within a couple of degrees?

I'm re-installing my EGR valve, but I don't have it right now. I'll post separate for EGR valve.

 

Head gaskets? Since you have deleted the EGR cooler, we cannot blame it on boiling coolant. What else can it be? A bad degas cap maybe?

 

If so, plug in the egr and see what happens then.

 

Are you thinking it is just overheating because the fan is inop with the EGR unplugged? Possible, but it appears that he has been watching the ECT's pretty closely.

 

Yours sounds about the same as mine.I'm happy with my temps.

 

wouldn't I see some other issue with head gasket, like murky oil from coolant leak? or power loss?

why would head gasket make coolant puke, and just a bit.... can't notice a drop in degas bottle level, just see the spray pattern and smell the coolant cook. AND, I have ARP head studs, so shouldn't I be good against head gasket issues?

 

that's my plan, just see what happens when i get the EGR back on. I haven't heard fan kick into high, but i haven't towed lately either. hoping it might be fan issue or something. but i am monitoring my temps and they aren't that high when i get the puke-back.

 

I just got my insight hooked not long ago and this is what I am seeingon an average: (I have never saw the 15 deg delta, but have seen 12-13)

ECT: 193-197
EOT: 203-207

Today the temperature out side was 94 degrees, AC blowing on high, cruise set on 75, using innovatives street tune, not towing anything, my temps averaged about ECT/193 & ECT/203. It appears that I am staying about a 10 deg difference. This seems to be approaching the 15 deg dreaded difference.

Questions:
1. From what I've read if you are having a 15 deg delta, this an oil cooler issue?
2. I seem to be close to the 15 deg delta, however, my sustained temps mentioned above seem to be in the NORMAL range per Bismic's sheet for stock (hence, i am using a tuner). So, if you do see the 15 degree difference BUT are within normal operating temps, is this still a problem.
3. Where did the 15 degree rule come from, that may help clear things up for me.

One more thing, coolant was flushed about 17kmiles ago and I am using a coolant filter (may be a little plugged, its the second filter and its been on for about 3000k miles)

Thanks

F250, FX4, sct innovative tuned, 4" TB no kitty, 130k miles, coolant filter, OEM filters, RT 5w40 synthetic, EGR blocked, ARP studs...all for now