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Running Hot

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Old Nov 26, 2020 | 02:05 AM
  #1  
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Default Running Hot

Hello all, seems I haven't logged in here since 2017, I'm running a 2018 F150 that seems to be running on the hotter side 239° most of the time, it gets worse as the weather temperature drops. I've already changed or replaced the following
-Radiator (2x)
-Rad Fans
-Thermostat (2x)
-Water Pump

I'm kind of stumped at what could be happening, the service writer at the dealership here in town said maybe a turbo but I get great fuel mileage and have a ton of power so I'm doubting that.

Thoughts?

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Old Nov 26, 2020 | 07:35 AM
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Have you checked the louvers in front of the radiator and the thermal switch for the fans for proper operation? Of note Ford went back to 60's tech on the 3.0 power stroke and uses a mechanical fan with a fluid clutch. One less electrical sub system to malfunction.
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Old Nov 26, 2020 | 08:00 AM
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Bad temperature sensor?
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Old Nov 26, 2020 | 08:49 AM
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I'm having the same issue with my 2018 3.5L EcoBoost but it didn't start happening until I had the cam phaser tsb done.
So far I've had the radiator flushed twice, a bunch of reprogramming and the thermal expansion valve replaced. This was all under warranty by the same dealership and I still have this issue. Mine only gets that hot when the turbos are working for more than 3 to 5 seconds.
I'm bringing it to a different dealership on Monday so I'll let you know if they can find a fix for this.
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Old Nov 26, 2020 | 12:31 PM
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Of all the things that could easily be changed, the CHT (Cylinder Head Temperature) sensor is the least expensive and very likely the issue. There have been many posts on this forum regarding inaccurate CHTs.
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Old Nov 26, 2020 | 01:28 PM
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Originally Posted by 52merc
Of all the things that could easily be changed, the CHT (Cylinder Head Temperature) sensor is the least expensive and very likely the issue. There have been many posts on this forum regarding inaccurate CHTs.
I've told the dealership this and they insist the sensor isn't the issue. I'm going to a different dealership on Monday. Hopefully they are more competent.
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Old Nov 26, 2020 | 05:34 PM
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Originally Posted by Mferry22
I'm having the same issue with my 2018 3.5L EcoBoost but it didn't start happening until I had the cam phaser tsb done.
So far I've had the radiator flushed twice, a bunch of reprogramming and the thermal expansion valve replaced. This was all under warranty by the same dealership and I still have this issue. Mine only gets that hot when the turbos are working for more than 3 to 5 seconds.
I'm bringing it to a different dealership on Monday so I'll let you know if they can find a fix for this.
mine also started right after the Cam Phaser were done
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Old Nov 26, 2020 | 05:35 PM
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Originally Posted by 52merc
Of all the things that could easily be changed, the CHT (Cylinder Head Temperature) sensor is the least expensive and very likely the issue. There have been many posts on this forum regarding inaccurate CHTs.
Is this the sensor that pulls the coolant temp ?
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Old Nov 26, 2020 | 06:46 PM
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Originally Posted by sean453
Is this the sensor that pulls the coolant temp ?
Yes, the PCM interprets the output from the CHT sensor and displays an 'inferred' coolant temperature.
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Old Dec 5, 2020 | 12:33 AM
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So I had data logged the truck and the KR was high and the engine timing was heavily Retarded with zero DCT’s would this be causing the heating issues and if so what would he the cause

thanks
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