2019 Cylinder Head Temps

BigDinTexas said:

That’s what I’d like to know. That’s what is concerning is that a few posts early on mention CHT to be normal up to 220* but I’m seeing greater than 240*... I know this isn’t the same as coolant temp , I was making it clear that the vehicle wasn’t overheating or popping any CEL’s. I just don’t know the how it’s obtaining that measurement or from where. Hoping someone here might be able to explain

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Nothing to be concerned about. The CHT is literally measuring the temperature of the cylinder head itself, not the coolant, which is why it will read significantly higher than ECT under a variety of conditions. The CHT sensor is located on the rear of the passenger side cylinder head, below the CMP sensors.

The purpose of the CHT is to prevent an engine overheat condition in the event that a significant loss of coolant occurs. Once the ECT is no longer surrounded by coolant, the readings will not be accurate. This causes ECT to drop while actual engine temperature is increasing. As the CHT is reading the cylinder head temp and not coolant temp, the readings will remain accurate and the PCM will know you enter limp mode/fail safe strategy.

FordTechOne said:

Nothing to be concerned about. The CHT is literally measuring the temperature of the cylinder head itself, not the coolant, which is why it will read significantly higher than ECT under a variety of conditions. The CHT sensor is located on the rear of the passenger side cylinder head, below the CMP sensors.

The purpose of the CHT is to prevent an engine overheat condition in the event that a significant loss of coolant occurs. Once the ECT is no longer surrounded by coolant, the readings will not be accurate. This causes ECT to drop while actual engine temperature is increasing. As the CHT is reading the cylinder head temp and not coolant temp, the readings will remain accurate and the PCM will know you enter limp mode/fail safe strategy.

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@FordTechOne Thank you for taking the time to explain this... It's really helpful.

isis said:

I know this is an old thread but I’m calling BS on a daily driven 1350 hp anything.

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I guess you chose not to click the link in OP?

BigDinTexas said:

That’s what I’d like to know. That’s what is concerning is that a few posts early on mention CHT to be normal up to 220* but I’m seeing greater than 240*... I know this isn’t the same as coolant temp , I was making it clear that the vehicle wasn’t overheating or popping any CEL’s. I just don’t know the how it’s obtaining that measurement or from where. Hoping someone here might be able to explain

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Interesting to follow up to this whole thread. So I bought a 2020 about 2 weeks ago. It's CHT runs 217-228.

So it runs 5-20 degrees cooler than my 2019.

On a certain portion of the highway, just 2 weeks ago, going up a hill in 10th, it'd get up to 255cht. I'd down shift it and they'd come down 10 degrees pretty fast. Well my 2020 doing the exact same thing, in exact same ambients, won't go past 233cht. Hmm interesting.

FWIW my 2019 was flawless that whole time.

It’s posts like these that make me wish either people knew more, or ford showed less.

it’s a non-issue. If it was a concern, the truck would tell you by going into limp mode.

Donmatteo said:

It’s posts like these that make me wish either people knew more, or ford showed less.

it’s a non-issue. If it was a concern, the truck would tell you by going into limp mode.

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I think they would be better served by either putting just the ECT in the Measurements page or a combo of ECT and CHT.

This is the first manufacturer I’ve ever seen that displayed CHT as part of their viewable metrics. Hell, the other major domestic manufacturer’s do not even have a CHT reading.

Rednose said:

Reaching to 224 CHT is overheating and will put your truck into limp mode.
I have been there done that and cant figure it out.

My certain guess will be a head gasket.

So the truck will definitely let know when it is overheating.

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Uh, no. 224 CHT is completely normal.

quikag said:

Uh, no. 224 CHT is completely normal.

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Sorry my mistake I meant coolant temperature.

Rednose said:

Sorry my mistake I meant coolant temperature.

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Nope wrong again. These trucks are designed to run at that temp for efficiency.

Booth9999 said:

Nope wrong again. These trucks are designed to run at that temp for efficiency.

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Yes you are right and I got the whole thing wrong.
I got mixed up in the Celsius and Fahrenheit units.
I meant temps in my truck have reached 124 Celsius.


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