Thanks to Bismic for telling us about these Mishimoto T-stats. It is part # MMTS-F2D-03H

Mishimoto 200° on left, Ford 192° on right. I'm in the process of installing the Mishimoto....taking a break to show you guys pics. I'll have a video of the thermostat removal up later for those that would like to see.

The Mishimoto T-stat does NOT come with the 3C3Z-8255-AA o-ring for the thermostat housing. I re-used mine since it was fairly new. If you're replacing a T-stat that's been in there awhile, you might want to get a new o-ring.

Right now I only see it available at 2 places...
Xtremediesel for $56 + free shipping Mishimoto MMTS-F2D-03H High-Temperature Thermostat

Or directly from Mishimoto for $70 + shipping
Ford 6.0L Powerstroke High-Temperature Thermostat, 2003–2007, by Mishimoto

 

Well sure looks like the saved 18cents on the air bleed check valve hu? The main spring looks a bit beefier and I can't tell from the pic but is there a bottom spring in the misho?

 

You doing the rad too? I think doing this may change all parameters of the pids...........but I've been wrong before. Following this for future ref

 

Wow I wish I had one of these when I changed mine. I just really need a higher temp in winter.

 

The only thing I did was replace the thermostat. I just went for a test drive, and I like what I see so far. On interstate, cruising steady at 65 mph I saw 203 - 205 ECT with 95° outside air temp. I was not towing, and just me in the Excursion. With my fairly new Ford thermostat, my normal interstate ECT was 186 -188. I gained about 15° in coolant temp by only changing to the Mishimoto 200°.

Here's a Torque Pro screenshot while on interstate....

 

Yea I noticed the bleed valve too. Yes, that main spring is BEEFY! Was fun pushing it down to install in the housing. I didn't pay much attention at the time, but I'm pretty sure there is no lower spring. (I'm not taking it back out to check!)

 

Did you do a mit rad too?I like the numbers too.....How much for the Stat?

 

65 mph on interstate, no A/C, 95° outside...coolant temp 203

<iframe width="560" height="315" src="//www.youtube.com/embed/_p0-pSBC83c?rel=0" frameborder="0" allowfullscreen=""></iframe>






Same deal, but A/C is on.... coolant temp 204.8

<iframe width="560" height="315" src="//www.youtube.com/embed/WJWAsoUN90o" frameborder="0" allowfullscreen=""></iframe>





After the highway drive, sitting at a stoplight....coolant temp 201-203

<iframe width="560" height="315" src="//www.youtube.com/embed/2RrQsoiA8Hs" frameborder="0" allowfullscreen=""></iframe>

 

No, I only swapped t-stats....no other changes.

I bought mine directly from Mishimoto....I suggest getting one from here for $56 & free shipping....that's a whole lot cheaper than I paid.

http://www.xtremediesel.com/mishimot...hermostat.aspx

 

There are much better 6.0 thermostat removal videos on YouTube than the one I made....you wouldn't know I replaced my thermostat a few months ago....I'm ashamed.

 

Like to know if you notice any increased mileage in a few days please.
Thanks
Randy

 

Will do for sure, as I'm very curious myself. I have a 200+ mile trip next week.... I will fuel up before and after the trip. I normally average 17-18 on the highway....I'll update the thread with the results next weekend.

 

Thanks, my bet is that it goes up.

 

Thanks for sharing, under same load and conditions I see 198-201 with my new ford thermostat. But my oil temps are within 2 or 3 degrees under same conditions. You should see a little increase in fuel economy from your original low temps. Nice Job!

 

What's the reason for this vs the factory thermostat?