You are correct, 15 spread between the two is delta. You could in theory have a 0 degree split. But it's usually gonna be 2-3...

It does sounds like a good start to trouble free owning though!

 

From what I have pieced together. The hot oil first passes through the oil cooler where "coolant" attempts to reduce the oil temperature in the exchange process. Therefore the oil is always going to be hotter than the coolant. Therefore when I program my ScanGuage today it would be best to stack the EOT on top of the ECT in the display window. Now simple subtraction yields the Delta. Which should not exceed 15 degrees.
After the oil cooler the coolant then proceeds to the Exaust Gas Recirculation unit. This is where contamination from combustion leads to plugging of the heat exchanger fins and the increase in coolant temperatures. High temperature leads to gelling of the coolant liquid, which in turn begins to plug the passages in the oil cooler and the destruction process has begun.
Have I got it right so far?

Now, if I have deleted my EGR, and replaced my oil cooler after a complete engine flush followed by installing new Ford Gold coolant and within 50 miles installed the Sinister coolant filter I should be good to go. The gauges I have or am installing should just be a monitor for my paranoia right? Yes I know about the head stud issue, but I do not flog, dog or beat on this truck. Using 0w-40 Mobile Delvac syn, and Standyne conditioner. On recent 4500 mile trip to Arizona and back to Canada I was getting as high as 19.3 mpg (US gallons) running around 70. Currently sitting at 97,000 miles

Nothing on my truck had failed before the conversions. Cost for repairs so far, one failed ICP $175, no labor. The conversions were prevention not repair. All the conversions were done labor free. All parts and fluids including 2 new S belts, around $1600. Now if I could only convince my wife this was all a good idea!

 

Mark,

Re: changing the sensor out. Any oil leakage when sensor is pulled? Any sealant on sensor threads when replacing? I'm looking to replace mine, as it will sometimes decide to read 20+ degrees cooler than the ECT. Run down the road for 2+ hours reading 200-205, then next time I check the Scangauage it reads 174. X codes are correct. Reads correctly most of the time, but it still annoys me when it goes goofy. Cheap part to replace. Just want to be prepared for any surprises!!

Thanks,
Steve
2005 F250 CC SB 6.0

 

I did the sensor change-out when I changed the oil. So not sure if much oil would come out or not.

I did use a little dab of sealant on the threads. Loctite IIRC.

I also like the Gasoila products (JC-30 for oil)

Gasoila Chemicals - Quick and Easy Sealant Reference Guide

 

Read up on the CAT type ELC's and you may determine you haven't fixed anything running Ford gold coolant, as in your oil cooler is going to jamb up with silicates. Just my 2 cents.

I'm going to be the back sheep here and say I'm happy with my rig, today I was running 188 ECT \ 210=214 EOT at 70+ MHP after 50 miles of flat freeway and 72-75F outdoors. If anything my coolant temp is low and my oil temp is perfect in this condition. I'd actually be worried if my oil temps were down in the 190 range all day and night as that may lead to poor MPG and other problems.

I have back flushed my cooler, I know it lets at least 10 gpm flow through it so I'm not worried about coolant getting to the EGR cooler. EGR not deleted.

 

My EOT goes nuts from time to time as well. It's on my list to change the sensor. The highest it goes is 3 or 4 degrees warmer than the ECT. Most of the time, it's +- 3 to the ECT. I'll check tomorrow AM on a cold soak to see where it is compared to the ECT. It's almost midnight here and still 86 degrees.

Is there a specific part number I should be looking for or just get what Tousleys says?

 

3C3Z-10884-AA

 

This morning:

EOT: 95
ECT: 92

Thanks for the PN Mark.

 

I'm not aware of any clogging going on in the EGR cooler. If the exhaust gas passages were clogging, it would DECREASE the heat transfer to the coolant. I think it's just the heat that's designed to be there that breaks down the Ford Gold Premium, that if they had simply used the same ELC that International put in this engine, we would not even have this forum to talk about the 6.0L.

 

We would still have FICM's, STC fittings, dummy plugs, ICP sensors, fuel pressure regulator springs, etc to talk abaout - lol.

Seriously though, there things other than clogged oil coolers that can blow head gaskets like overboost). Also - there are plenty of folks that are quite reliable w/ their Ford Gold coolant (folks that are tuned and still have their EGR system).