thermostat question

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Mar 6, 2015 | 06:34 PM

jlatr

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Joined: Feb 2015

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thermostat question

My temp has been running between 178-181. (that is after a half hour of driving.) The ford shop said that is normal and that the 6.0 is suppose to run between 170-180. I have learned the hard way that my local ford shop is not very reliable. I thought I would ask you all since I have learned more for you all than any ford shop.
Thanks.

Mar 6, 2015 | 06:46 PM

bubba_78363

Mountain Pass

Joined: Oct 2010

Posts: 237

Likes: 3

From: Athens, Tx

In a nutshell...No that is not normal. I believe the OEM thermostat is rated at 192' and normally starts to crack open about 185. How cold is it where you are at? What is your EOT? Have you compared EOT, FWT after a good cold soak? If I were you I would go ahead and pick up a new thermostat either OEM, or there is also a thread on here where a bunch of folks have up-graded to the Mishimoto 200' t-stat

Mar 6, 2015 | 06:55 PM

69cj

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Joined: Jul 2005

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From: Middle Tn.

My 2005 always ran between 195 and 204 depending on load and ambient. In the 9 years that I had it never had to change the t-stat. Guess I had a good one.

Mar 6, 2015 | 07:01 PM

jlatr

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It was around 70 F today. I ran it for about two hours on the freeway and the hottest it got was 181. My EOT has been slowly climbing. It was at 196 today. I am going to have to get a new oil cooler soon.

Mar 6, 2015 | 07:07 PM

69cj

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Joined: Jul 2005

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From: Middle Tn.

From here it does sound like it.

Mar 6, 2015 | 07:14 PM

diesel_dan

Lead Driver

Joined: Jul 2004

Posts: 6,951

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From: Foothills, CA

Quote:

Originally Posted by 69cj

My 2005 always ran between 195 and 204 depending on load and ambient. In the 9 years that I had it never had to change the t-stat. Guess I had a good one.

I must have lost track, but when did you get the '15 and please don't tell us how freakin'bitchin' it is

(Just kidding)

No wonder you still come to the 6.0 forum the 6.7 one is:

Mar 6, 2015 | 09:10 PM

Double4LinkDiesel

Freshman User

Joined: Jan 2015

Posts: 30

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From: SE Wisconsin

Mine was doing that, changed stat, good to go. Was partially stuck open and wouldn't warm up. I just used the OEM factory stat. Runs about 192, even -10 degrees.

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Mar 7, 2015 | 08:59 AM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 26

From: Middle Tn.

Quote:

Originally Posted by diesel_dan

I must have lost track, but when did you get the '15 and please don't tell us how freakin'bitchin' it is

(Just kidding)

No wonder you still come to the 6.0 forum the 6.7 one is:

LOL, got it in Nov. after Ford did a buy back on my 05. Couldn't keep turbos in it. Other than that was completely happy with the 05. As far as coming here, there are a lot of great people here and if I can help someone as I was helped when I was new I am glad to do it. You are also correct in there being a little more action here. Door locks and egt sensors are the hot topics in the 6.7 forum.

Mar 7, 2015 | 07:08 PM

#10

Per4mance

Logistics Pro

Joined: Mar 2013

Posts: 4,097

Likes: 23

From: Kissimmee,Fla

I'd take those problems anytime LOL

Mar 9, 2015 | 02:54 PM

#11

Mishimoto

Former Vendor

Joined: Apr 2013

Posts: 236

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Quote:

Originally Posted by jlatr

As others have mentioned, it sounds like your thermostat is on its way out. A new stock unit should run right around 192 degrees. If you would prefer an alternate temperature, we offer a 200 degree unit which has proven to be a great upgrade for several folks here on the forum.

Let us know if the temperatures recover once you replace your thermostat!

-John

Mar 9, 2015 | 07:12 PM

#12

Georgia8er

Senior User

Joined: Aug 2014

Posts: 118

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I wouldn't count out your oil cooler just yet. Mine was having almost 20* deltas with my water temp at 180*, but I replaced the t-stat with the 200* mishimoto and I have 5* or less now.

Mar 10, 2015 | 12:15 PM

#13

jlatr

Thread Starter

Freshman User

Joined: Feb 2015

Posts: 42

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I want to go with the Mishimoto but i have read that they don't always seat right (depends on the housing you have) and they don't come with a new o ring.

Mar 10, 2015 | 01:01 PM

#14

KDAVID1

Logistics Pro

Joined: Feb 2013

Posts: 4,073

Likes: 5

From: TX

Quote:

Originally Posted by jlatr

I want to go with the Mishimoto but i have read that they don't always seat right (depends on the housing you have) and they don't come with a new o ring.

A: they come with a new oring
B: use housing rt1169 if you don't feel lucky