Does simple green naturalize the CLR?

Do you mean to if the delta is above 8* spread?
I'll in the process of triple flushing my new to me 6.0. I had no way to check the temps but a PH test put it at 7.5. It only has 42k on the vehicle and drove from Las Vegas to Ca. in 100*+ heat... flawlessly. The OEM coolant looks as clean as new, but due to the Ford Gold issues I'm installing a coolant filter also. What is the most cost effective way to get ECT & EOT?

 

One of the least expensive is Torque (I spent the $5 and got the Pro version) or Forscan on your Droid device with a bluetooth adapter plugged into your OBDII port. My adapter is a cheap eBay one ($10 or less), but others have had problems with them and have gone for a name brand unit more in the $20 range (Bafx I think the name is). If you get Torque Pro remember to start out by bringing in the Ford specific PIDs...

 

Coolant temp to the oil cooler will actually be less than 190F. The oil cooler is supplied directly from the water pump discharge, which is a mix of radiator return water & whatever the thermostat mixes from the engine block, so the temp of the water supplied to the oil cooler will vary depending on what the thermostat is doing.

 

Let me try this again from a slightly different perspective - the ECT sensor measures the coolant temperature that is discharged and circulated by the water pump. The coolant that is measured by the ECT sensor is the same coolant that feeds the oil cooler. It is COOLED coolant (I totally understand that the thermostat allows some hot water to mix with lower temperature coolant from the radiator to maintain a "desired" temperature). No doubt it can be cooler (or hotter) than 190 degrees - clearly dependent on the thermostat AND the heat load on the engine (among other things). The "thermostat variability" really isn't what was being discussed at all; simply that the oil cooler sees the coolest temperature of coolant that is distributed (or circulated, as I stated in the post you quoted) by the water pump ...... and that the health of the oil cooler is appropriately evaluated by the "approach temperature" (ie how close can the temperature of the oil coming out of the oil cooler be maintained to the "inlet" coolant temperature). When the coolant system is clean and contains the proper coolant, the OEM oil cooler works just fine - just like you don't want coolant and oil too hot, you also don't want oil (or coolant) that is too cool.

 

I was just typing the same time as Mark....

 

Mark,

Looking at the diagrams & pictures it sure looks like the ECT is seeing the coolant temp off the block before it's mixed in the thermostat?

 

The oil cooler and the engine block are fed the coolest temperature of the coolant. The ECT measures the temperature out of those. When the T/S opens fully, the recirculation of warmed coolant to the water pump is closed. The ECT sensor is positioned to always read the hotter EC, we have no idea once the T/S is in fully open position what the colder coolant temperature is in my understanding.

But I'm half-way asleep right now.

 

I agree, I was off on the ECT position - thanks FiveOJester! The coolant discharged from the water pump will be a blend of cooler coolant from the radiator and the recycled warmer water. That said, the "cooled and circulated" coolant (at some temperature below the measured ECT temp) is fed directly to the oil cooler (ie it is the coldest point of the circulated coolant) - which was my main point.