Thermostat?
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Senior User
Joined: Feb 2017
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From: Belfair, Washington
Thermostat?
Okay, so not ever having done a thermostat on my truck, where is it? How much is it? Where do I get one? and are there any particular sources for one? Oh yeah, and what temp do I want to get?
Postmaster
Joined: Aug 2015
Posts: 3,910
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From: NW IA
Here is a basic video
Many of us like the 200* Mishimoto, but it's your call. Search here for the Mishi thread, don't let the posts about the problems of them not fitting right scare you, from what I have read it's not an issue anymore.
https://www.ford-trucks.com/forums/1...hermostat.html
I'm sure others will chime in but it's a pretty basic job unless you have an early build like me then it's an extra pita with the EBP sensor right there.
Many of us like the 200* Mishimoto, but it's your call. Search here for the Mishi thread, don't let the posts about the problems of them not fitting right scare you, from what I have read it's not an issue anymore.
https://www.ford-trucks.com/forums/1...hermostat.html
I'm sure others will chime in but it's a pretty basic job unless you have an early build like me then it's an extra pita with the EBP sensor right there.
Senior User
Joined: Jan 2017
Posts: 428
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From: Central Illinois
Whichever brand you choose, I would recommend boiling it on the stove first with a thermometer or infared temp gun to see exactly what opening temp is & fully open temp is. From my experience most tstats start to open 5° under their rated temp. Since most on here have unbelievably clean & free flowing coolant systems it's no surprise that your actual reading after install is in between opening & fully open temp.
My gates tstat is rated at 192. My opening temp is about 185 & fully opened at 191. I've yet to see my readings ever go past 194. Normally hangs out between 187-189.
My gates tstat is rated at 192. My opening temp is about 185 & fully opened at 191. I've yet to see my readings ever go past 194. Normally hangs out between 187-189.
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Senior User
Joined: Feb 2017
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From: Belfair, Washington
Got it, that settles it, I will get one then. Thank you so much for your input and information. You guys on this forum ROCK
I am very appreciative of everything you guys do to help me and others out!
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Lead Driver
Joined: Sep 2003
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From: Other side of the sunrise
I totally understand the logic, so you don't need to reiterate on my behalf... But I have to ask, by what logic did Ford/IH have to determine using a 190* thermostat? Especially being that the purpose behind moving to the 6.0 in the first place was to meet tighter federal smog requirements, why would they use a thermostat and design that would run less clean? It seems illogical to me... Unless maybe there's something I don't understand about what constitutes "smog"?
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Brett Foote
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From: Central Illinois
Just my personal preference, but i prefer the cooler 192 on a stock truck. The stock 6.0 heads are terrible & all have cracks. More heat will definitely help promote more cracks in them & open up the existing cracks more. Now if you're studded and have non stock heads with hardened valve seats & guides then you can argue the higher heat theory.
FTE Legend
Joined: Jul 2005
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From: Millersville, MD
Me thinks you will find MANY, MANY of are still using stock heads with NO issues and using the 200* stat! Mine's been in for almost 2 years and I tow pretty heavy too! ( I do have studs tho)
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Senior User
Joined: Feb 2017
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From: Belfair, Washington
Just my personal preference, but i prefer the cooler 192 on a stock truck. The stock 6.0 heads are terrible & all have cracks. More heat will definitely help promote more cracks in them & open up the existing cracks more. Now if you're studded and have non stock heads with hardened valve seats & guides then you can argue the higher heat theory.
And someone throws a wrench into it! LOL
Now I do not know what to do
I guess I will just leave it alone since it is fine now, and worry about it later, maybe when I stud this summer.
Senior User
Joined: Jan 2017
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From: Central Illinois
Well from a mechanics point of view, cracked heads = junk. There's many who say that cracks are fine & don't have any issues, this includes ford themselves. Will they seal up & hold compression with no issues? Sure they will. My point was that more heat = bigger cracks. I don't want to discourage anyone from using a 200° tstat. Simply adding factual information. More heat will definitely give better mpg, but more heat is 100% proven bad for oil & internal engine component wear. You just have to ask yourself if the mpg gain is worth it.
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Senior User
Joined: Feb 2017
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From: Belfair, Washington
Very good points. I appreciate you pointing out this stuff. I wonder how much difference the 8 degrees really effects oil and engine wear? I would think that 8 degrees is not really that much.
Tuned
Joined: Feb 2016
Posts: 296
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I also have the 200F Mishimoto and running with no issues. I doubt 8 degrees will matter much myself. It seems the stock ones seem to have some trouble keeping the temp up, even new ones from my reading. My old one wouldn't get to 180F.
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Senior User
Joined: Feb 2017
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From: Belfair, Washington
Yeah, I am thinking I am going to go with the 200 deg Mishimoto one. Do I have to get the one with the new housing, or can I re-use the factory housing? Also should I replace the upper radiator hose also?