The 7.3 is a lower compression, lower RPM engine in a completely different vehicle. Not all gas engines are designed to operate at the same temperature and to say that they should is just ridiculous.
Maybe you're fine with an engine running at 230 degrees baking the hell out of all the plastic components packed around it. I think practically burning my hand touching the inside edges of the fender is rather ridiculous.
There are actually very few topics on this board, there are many threads and it is the same stuff over and over. Misinformation about operating temperature is one of the most common. Screeching about deleting the aux battery had its time as well. If you people would just turn your A/C on your engine temp would rest perfectly at 195.
230 degrees is on the lower end of whats been happening with the jeeps 3.6 / 2.0 / 3.0
My 3.6 hit 235 last summer on a mild up hill clime and would have continued to clime if I did not hit the top of the hill
I have read people having hit 240 and above and going into limp mode
This is very pore designing on the part of the jeep engineers
With the fan controller I have solved the problem that the jeep engineers did not
Now what we need is to have someone Like Jon at RPM Extreme build some that will work on the 2.0/3.0 / 3.6 etongue
From what I have seen they all use the same radiator fan with the 3rd small wire that controls speed via the ECM
So it is possible to take control of fan speed and temperature at which the fan turns on
After installing the RPM fan controller I can see that it may be possible to hook up a device like this
https://www.summitracing.com/parts/...YZR8Z3ROoFXx_NIORjZYSwhvc1qHeijAaAiaVEALw_wcB
Installing the 1.5 resister tricks the ECM
The small wire that goes to the fan would be hooked up to the Derale PWM Adjustable Fan Controller
This may work
See picture
A quite similar platform (engine wise) is my work van. 2017 caravan with 211,7XX miles on it. 3.6 6AT. Never runs over 201*, no matter the ambient temp or how hard I’m driving it regardless of terrain, mountains, sea level, etc..
I hear what you're saying, and I respect your posts throughout this forum. Truly a lot of wise advice.
Lower operating temp means worse fuel economy, poorer heater/defroster performance, messing with the thermostat means potential check engine light and disabling of A/C system, aftermarket fan controllers are an additional failure point that nets you no real benefit either the exception of severe off roading in summer conditions.
HCP
It's always insightful to have a designer's perspective. Keep in mind that engineers are like artists, they are protective of their designs. I worked in the Airworthiness office of a large aircraft company for over 20 years and part of my job was to get engineers to fix things that didn't work out as planned. They are people and people can't always see all possible failure scenarios. A failure modes and effects analysis is only as good as the author's imagination and understanding of his system and it's environment. It's never 'one and done' with cars, airplanes, or Jeeps.
