CHT - older vs newer models?

[cidsamuth]

Trying to install a 2018 FiST motor in a 2015 FiST.

The old motor appears to have a cylinder head temperature sensor … the new motor does not.

Did the new motors forgo those sensors entirely? If so, can I have this accounted for in the tune?

 

[SteveS]

That's probably the sensor installed in the recall beccause the head problem on the 2014 and 2015 cars. They fixed the head problem on the 2016 and up cars so they don't need the recall parts.

 

[cidsamuth]

That's probably the sensor installed in the recall beccause the head problem on the 2014 and 2015 cars. They fixed the head problem on the 2016 and up cars so they don't need the recall parts.

That would imply they put a new head on during the recall, inclusive of a new wiring harness …. I don’t think the recall was that extensive, was it?

To my knowledge, the recall was for a coolant LEVEL sensor only.

Besides, I don’t think the recall was ever even done on my car, as the reservoir is not the right shape.

 

[MHBGT]

That would imply they put a new head on during the recall, inclusive of a new wiring harness …. I don’t think the recall was that extensive, was it?

To my knowledge, the recall was for a coolant LEVEL sensor only.

Besides, I don’t think the recall was ever even done on my car, as the reservoir is not the right shape.

Did you ever confirm this?
I think you are right, the recall added the new coolant lines, coolant level sensor, replacement thermostat, bypass valve, and some odds and ends. The programming added ECU logic to protect the cylinder head in case of low coolant levels and additional warning messages on the dash.

The newer cars had a different cylinder head design, which probably moved or completely negated the need for the sensor (head temp is probably calculated and not measured directly). Try to get the newer factory calibrations flashed to your old ECU if possible to confirm thing are working as expected.

 

[cidsamuth]

Did you ever confirm this?
I think you are right, the recall added the new coolant lines, coolant level sensor, replacement thermostat, bypass valve, and some odds and ends. The programming added ECU logic to protect the cylinder head in case of low coolant levels and additional warning messages on the dash.

The newer cars had a different cylinder head design, which probably moved or completely negated the need for the sensor (head temp is probably calculated and not measured directly). Try to get the newer factory calibrations flashed to your old ECU if possible to confirm thing are working as expected.

You're on the money, reference the recall and the revised head in later years (but not as part of the recall).

As for the sensor, turns out that I likely got a 1.6 Escape motor, which I guess didn't have the same sensor. The motor has since been switched out with a correct one from a FiST.

 

[BoostedST17]

I know this is an old thread, I'm in the process of buying a used engine for my Fiesta. I freaked out reading this post thinking the newer escape motor with a coolant temp sensor in the head would not work since I have a 17 fist and the engine should have been revised from ford. Well as it turns out my 17 DOES have the provision for the temp sensor in the head.

The OP had a 15 fist which probably had the revision already done (late 15 build?). The engine pictures without the hole was probably an older head desing from 13-14 year model escape, fusion or fiesta.

I hope this helps other fiesta owners looking for swap information.

Here is a picture of the engine out of my 17 fiesta.