203 degree thermostat. Should I install one? 99-03 7.3 - Ford Powerstroke Diesel Forum
General Diesel Discussion Discuss everything else pertaining to Diesel Pickups.

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 09-17-2011, 08:53 AM
Powerstroke.org Rookie
 

Join Date: Sep 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
203 degree thermostat. Should I install one? 99-03 7.3

I read that installing a 203 degree thermostat will allow the engine to operate more efficiently and get better fuel mileage

Anyone have any experience with this?


From what I read, Ford took the IH design and installed a cooler thermostat than the original design.

Thank you
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 09-17-2011, 01:49 PM
Serving Our Country!
 

Join Date: Aug 2007
Location: Manor, TX
Posts: 2,811
Thanks: 0
Thanked 11 Times in 10 Posts
Feedback Score: 2 reviews
Depends on what your drying to do. If your in a cold climate and want some extra heat or you just want to hear your fan run more often then go for it. If your towing a bunch then you might want to go the other way and use a 180 from Strictly Diesel.
Reply With Quote Quick reply to this message
  #3  
Old 09-17-2011, 02:03 PM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,055
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
I use the 203*. My doesn't run much more than it did before. Yea this summer but that's because it was 105 almost every day.
If it gave me better mileage, it is very very slight. MAYBE MAYBE .5mpg better. Doubt it. It does idle a bit smoother though since everything is a little warmer. Even if you go back to stock or cooler, put in a billet thermo housing. Much better than the stock stamped version.
Reply With Quote Quick reply to this message
  #4  
Old 09-17-2011, 02:03 PM
Powerstroke.org Rookie
 

Join Date: Sep 2011
Posts: 17
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thanks for the reply. I've read that IH designed this engine with 203 degree thermostat and that it is most efficient in this temp range. Some people believe that installing a low temp thermostat is good, but my understanding is that in that case the engine will not warm up to its intended operating temperature.

Maybe someone can correct me if I am wrong.

The truck is located in Colorado, so hot weather is not usually an issue.

Don't know why Ford elected to go with the lower temp thermostat and why they elected not to install the coolant filter that the manufacturer designed into this engine. Seems like false savings in my book. Or am I wrong about this?
Reply With Quote Quick reply to this message
  #5  
Old 09-17-2011, 02:11 PM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,055
Thanks: 0
Thanked 12 Times in 12 Posts
Feedback Score: 0 reviews
Yes the IH thermo is 203.
Yes, the IH water pump had a built in coolant filter mount.
They also put it into pickups, not busses and such.
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 04:15 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