Started out with these temps. First picture is at a stop sign 5 miles from house. Second is at work.

 

The fix..............................

 

Same stops.It stays around 199 to 201 most of the time.

 

It would seem there is some fitment issues with the Mishimoto thermostat and some early thermostat housings. There aren't any pictures but check post #19 in this thread.
https://www.ford-trucks.com/forums/1...coolant-2.html

 

So what do you guys think of this response from Moshimoto:

William,

I received the thermostat and housing, thank you.

It did appear that there was a small change that Ford made from the newest housing and the housing you provided me with. Conveniently, we had a newer thermostat housing here
You can see in the attached picture that the newer one is one the left and yours is on the right. I have sent them both to you as a courtesy and we are going to include on our website that some customers may need to purchase the newer thermostat housing for compatibility!

Here is your tracking number:

USPS 9405511899561296626523

Mishimoto strives for the best Customer Service. Have I fully resolved any questions or concerns you were contacting us about today?

Thanks,

Rachel Turtz
Mishimoto Automotive
302.762.4501

Please contact us at support@mishimoto.com!



Ticket Details
<hr style="margin-bottom: 6px;height: 1px;BORDER: none;color: #cfcfcf;background-color: #cfcfcf;"> Ticket ID: LUX-326-24413
Department: Customer Service
Type: Issue
Status: In Progress

Support Center: http://mishihd.com/index.php?

We look forward to speaking with you soon and thank you for trusting Mishimoto with all of your cooling needs!

Thanks,
Mishimoto

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the picture of the thermostats didn't go thru

 

It sounds like they make a thermostat that fits the new style housing and if yours isn't that housing, your going to buy one. Having just purchased this thermostat last week, not a single word from the seller (XPD) stating this is a requirement... maybe a disclaimer in the advertisement stating this is in order. It sure would avoid a bunch of "is this the right part" questions... I have an 04 and now wonder if I got the right part... maybe someone will get off the pot soon? And i just bought a Ford thermostat before all this 200* stuff came about. Never installed it, maybe its the right housing... Maybe someone over there would like to clue the rest of us in on "what is the right housing" instead of maintaining the status quo.

Prediction of my future...

order a Mishimoto thermostat, gets here, cool. Take the truck apart, doesn't fit, check the new Ford housing I have, wrong still. Put truck together and cuss the damn thing until blue in the face! Order the new housing (now at $100 for a thermostat change not counting fluid), buy a second round of fluid and spend the hour fixing it again, this time correctly. That's two housings and two thermostats and two rounds of fluid in my case.

I'm in the wrong business!

 

Hmm, I never new there was more than one type of housing for the 6.0? Aren't all Motorcraft t-stats the same part #?

 

My truck is a 06, I have the orginal t stat housing and a new one. I can not for the life of me see a difference. I know when I go to put it in

 

I have 3. One in the truck that came from my
local IH dealer and the other two from Ford.
The one form IH is holding steady at 192º
SO do I pay $56 for 10º more? At this point
I think I may wait the winter and see if the
numbers hold out of not.

Sean

 

Mine has been goofy as heck. It was mid to high 70's on the way home today and ECT was 194 to 196. When OAT is below 70 it won't get above 190 hardly and when OAT is in the low 50's and below 186 188 is the becoming my norm.

2006 F350 4X4

 

Sounds to me like ithaca1230 just sent Mishimoto a housing they have never seen before (He doesn't have a Sig line but his profile says his X is an '05) That would explain why were just hearing about it, and to be honest I'm with Money-Pit (and probably many others including Mishi) who thought they were all the same.

WhatsonR,
If you've bought a housing recently I'll bet that one works for you. Don't forget about the rod possibly extending during shipping as mentioned earlier in this thread. If neither one will work I have 3 or 4 around here I'd be happy to send you one-no charge.

Sean,
If you currently have a 'stat in your truck that's holding 192° I honestly wouldn't worry about this right now but when/if it drops later you now know there are options instead of putting yet another failer in there.

Ithaca1230,
Thanks for posting this info.

 

Looks like Amazon is FINALLY selling this part. Says it ships in 1-2 months, but it's prime free 2 day shipping, lol!

 

Amazon Pppp.

List Price: $70.00
Price: $57.41 & FREE Shipping. Details
You Save: $12.59 (18%)
Usually ships within 1 to 2 months.
Ships from and sold by Amazon.com.
Direct fit for the 2003-2007 Ford 6.0L Powerstroke
Higher activation temperature restricts coolant flow longer to allow a quicker engine warm-up, making this thermostat ideal for use in cold climates
Mishimoto thermostat activation temperature: 200 Degree F
Stock thermostat activation temperature: 192 Degree F
Lifetime Warranty

Is that an oops?


Sean

 

What oops, the wording?

Josh