mikeinatlanta

Would advise against letting that happen. Imagine the combined frustration and time one could waste going after everything like this on the internet. Remember guys deactivating ABS, the third brake light, seat belt chimes? The list goes on. You could spend a lifetime refuting lower temp t-stats, gauze air filters, toilet paper oil filters, sea foam, tornados, drilled brake rotors, slick 50, fuel magnets, and on and on.

jp2012

True. But everybody needs a hobby.

msgtord

No, actually I am that egghead. Or other wise known as an automotive enthusiasts. I like to tinker with my vehicles, and any other mechanical or electrical device

The reason I experimented with the shutter was because I was trying to figure out why the engine temperature went up when I turned off the a/c. With the a/c on the temps are close to 200 degrees. Turning off the a/c resulted in an increase up to as high as 224 around town. That goes against any experience with all of my previous Fords.

This is the basics of what I've experienced with this engine and the cooling:

A/C on temps at approximately 200 degrees.

A/C OFF, HVAC on , temps go up.

HVAC off, ambient temperature at approximately 90 to 100 degrees, with speed at 80 mph, water temp at 229 degrees.

I took a 4200 mile trip in August and saw this consistently. A 3100 mile trip in December had the same temperature with the ambient temperature at below 60 degrees.

Thanks to tmcolegr for showing me the operating temps for the 5.0, so I now (with reservation ) except that these engines are designed to run hotter.

But I still don't understand why the engine temperature goes up with the A/C off. Although I realize now that it still falls within the perimeters.

Any thoughts? And please don't say to just except the way it is and just put gas in my truck and drive. Speaking on behalf of my fellow eggheads, that won't happen.

dalola

I would suspect it's because with AC on, the cooling fans run all the time, whereas if the AC is off, cooling fans only come on when signaled by the coolant temp switch.

msgtord

That's my thinking as well. But why do the shutters close with HVAC off?

dalola

My assumptions again, but, I would suspect it's because there's sufficient airflow to maintain coolant temps. I'm sure there's a high limit temp where the shutters would open, even if AC is off, in the same way the fans cycle on & off with AC off. It's all coolant temp based.

msgtord

I thought it was because the shutters were closed to decrease drag and help increase fuel mileage. But jp2012 states the shutters are for temperature control only. If that is so, then why is it ok for the temp to be at 200 with a/c on, but it needs to be 20 degrees hotter with less load on the engine? Oh well. I'll just fill up the tank tomorrow and drive.

Maybe I'll see what happens when I put in premium.

Davesp

Ford can control engine temp with a thermostat in the coolant path, why would Ford design and construct the shutters unless they add a means to control the aerodynamics or possibly engine bay underhood temperature?

Ricklee4570

Minus 4 degrees Wednesday morning and mine were partially open the whole time after I started my truck to let it warm up. I wonder if mine are malfunctioning? The truck still warms up very fast, but I have never seen mine completely closed (except the lower shutters)

Krazymarine

iTrader: (3)

[QUOTE=jp2012;5623634]Sure, that was common 40 years ago. Check your calendar. It's 2018.



I find it difficult to understand the amount of ego (or whatever else it is) that causes a person to think he knows more than the team of engineers and designers who designed the vehicle.


I can tell you why the "ego" as you call it. Most engineers have the knowledge down in Theory, however when it comes to real life experience and practice most are useless, to be honest. If you look at GE (turbine division) per example, they send some of their engineers to the "trenches" to actually turn wrenches and learn first hand how their equipment operates, is assembled and disassembled by the average Joe. I can personally attest to how many times I had proved engineers wrong on their "paper/Cad/simulations" they had run. Certain advances work in theory but not in real life. Let's mention the Eco first generation, engineers designed the engine but after a real-life test, many flaws have been identified, intercooler condensation, valves getting excessive carbon build up just to name a couple. Just because a team of engineers has designed something doesn't necessarily means it is perfect or absolutely necessary to have. have you heard of job security? there would be none if everything gets designed to perfection from day one. why would everyone say not to block the intercooler on the last generation eco? yet on this generation ford does? just a few points to think about. Being humble is the best attribute one could ever have. Remember, just because it was created by a college educated person does not mean its perfect or it would work as intended in real life. That is one of the reasons manufactures update parts, remove/delete systems all the time. For the record, I am a college grad, I had a team of professors during my college days, so my statements must be 100% accurate. just my .10 cents