T-stat bad? - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-21-2011, 09:44 AM
Powerstroke.org Fanatic
 

Join Date: Nov 2008
Posts: 96
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
T-stat bad?

Recently I've noticed that my delta has increased. Not so much from the eot increasing but the ect not getting to temp. I'm running between 182 - 186 in town and 186 - 192 highway. Could the t-stat be failed open?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-21-2011, 09:49 AM
Compression Ignition Addict
 

Join Date: Apr 2010
Posts: 2,044
Thanks: 0
Thanked 6 Times in 5 Posts
Feedback Score: 0 reviews
the OEM Ford t-stat is partially open at 182* and fully open at 192*

pretty sure those are the numbers
Reply With Quote Quick reply to this message
  #3  
Old 12-21-2011, 10:56 AM
Compression Ignition Addict
 

Join Date: May 2010
Location: Warren, Oregon
Posts: 1,515
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Quote:
Originally Posted by 07lariat View Post
Recently I've noticed that my delta has increased. Not so much from the eot increasing but the ect not getting to temp. I'm running between 182 - 186 in town and 186 - 192 highway. Could the t-stat be failed open?
From what i have see by my coolant flushing and changing out my t/stat yours could be stuck open better than closed. A stock t/stat starts to open at 192.2* and is fully at 219.2* the back side of a stock t/stat is stamped 89/104*C Celsius to Fahrenheit converter | Celsius-Fahrenheit.com When replaceing a t/stat use only Ford 3C3Z-8575-AA Thermostat with housing
2 stroker
Reply With Quote Quick reply to this message
  #4  
Old 12-21-2011, 11:23 AM
Compression Ignition Addict
 

Join Date: Sep 2011
Location: Newellton, LA
Posts: 1,249
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 2 reviews
How cold is it where you are? My truck was running around 186 cruising @ 65 so I thought that mine was bad, bought a brand new one from Ford and I still run 186 @ 65. That's all with outside temp around 50f. When it's 100+ outside I run around 194 @ 65.
Reply With Quote Quick reply to this message
  #5  
Old 12-21-2011, 01:58 PM
Powerstroke.org Fanatic
 

Join Date: Nov 2008
Posts: 96
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
It's been hovering around freezing for the past several days here (central Ontario). If the t-stat is failing does it affect the eot as well or just the ect?
Reply With Quote Quick reply to this message
  #6  
Old 12-21-2011, 02:09 PM
Compression Ignition Addict
 

Join Date: Sep 2011
Location: Newellton, LA
Posts: 1,249
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 2 reviews
If you have the stock oil cooler your ECT is going to have a rather large effect on EOT. If you have the BPD oil cooler it will still have an effect but not as much.
Reply With Quote Quick reply to this message
  #7  
Old 12-21-2011, 05:17 PM
Member
 

Join Date: Jun 2011
Location: Oak Grove, Missouri
Posts: 88
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by 07lariat View Post
It's been hovering around freezing for the past several days here (central Ontario). If the t-stat is failing does it affect the eot as well or just the ect?
I believe my t-stat is partially stuck open (have not had time to replace it yet) and i have observed ECT at 60 mph @ 184 degrees and EOT steady at 188. That is with outside ambiant temps of below freezing. In fact when the outside temp is around the freezing mark, i would not see EOT above 190 unless i put my foot in it...
Reply With Quote Quick reply to this message
  #8  
Old 12-21-2011, 06:00 PM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Richmond, IN
Posts: 483
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 2 reviews
You should be running about 192-196 with a good new thermostat. Between 35-50 degrees outside temp where I am.
Reply With Quote Quick reply to this message
  #9  
Old 12-22-2011, 04:21 AM
Member
 

Join Date: Jul 2011
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I am pretty sure my t-stat failled this weekend, this past weekend towing my 10k fifth wheel in 40* weather my ECT was ~176-179 and E)T was 185~190. I typically have a ~7* delta while towing my camper but was in the 10-11 degree range this weekend. Is it likely that my delta was larger due to the truck not running at temp or is time to flush the system? I checked the fluid and it is all good
Reply With Quote Quick reply to this message
  #10  
Old 12-22-2011, 04:41 AM
Powerstroke.org Rookie
 

Join Date: Nov 2011
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by pizza pig View Post
the OEM Ford t-stat is partially open at 182* and fully open at 192*

pretty sure those are the numbers
It starts to open at 89C and is fully open at 104C...so that is 192F and 219F respectively... Mine was running in the low 180s, I replaced my thermostat and now it is pretty steady at 190F..that was with it cold and rainy, so I would imagine that if it isn't rainy it will be ~192F or so.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 07:25 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors