203* Thermostat???
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Senior User
Joined: Jun 2008
Posts: 286
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From: Albuquerque, NM
203* Thermostat???
OK, finally found 
and picked up 4 gal. of Chevron Delo ELC not deluted for doing a coolant flush on my truck. Got to looking on this site and a Billet Aluminum Thermostat Housing is recomended so I am getting that but my question is weather or not the 203* Thermostat is a good idea. Anyone using it? Good or bad? Was reading someplace that maybe the oil temp would get to high using it? 
I use my truck mainly for pulling a 9000-1000lb. fifth wheel, for hunting, and a sunday ride now and again... Not a daily driver. I am planing on replacing the hoses while I am at it... I like to do it once and do it right the first time. Well, here is what I am looking at. Thanks in advance!
https://www.dieselsite.com/index.asp...ROD&ProdID=186
https://www.dieselsite.com/index.asp...ROD&ProdID=188
and picked up 4 gal. of Chevron Delo ELC not deluted for doing a coolant flush on my truck. Got to looking on this site and a Billet Aluminum Thermostat Housing is recomended so I am getting that but my question is weather or not the 203* Thermostat is a good idea. Anyone using it? Good or bad? Was reading someplace that maybe the oil temp would get to high using it? I use my truck mainly for pulling a 9000-1000lb. fifth wheel, for hunting, and a sunday ride now and again... Not a daily driver. I am planing on replacing the hoses while I am at it... I like to do it once and do it right the first time. Well, here is what I am looking at. Thanks in advance!
https://www.dieselsite.com/index.asp...ROD&ProdID=186
https://www.dieselsite.com/index.asp...ROD&ProdID=188
Posting Guru
Joined: Mar 2008
Posts: 1,734
Likes: 1
From: Monroe VA
I have the 203* stat and have had it for 10 or 15k miles with no issues. It's what International actually runs in their motors. Cant remember the exact reason why Ford changed it these motors though.
Dang I'm slow and didnt look at the link, either
.
Dang I'm slow and didnt look at the link, either
.
Senior User
Joined: Feb 2006
Posts: 420
Likes: 0
From: Alamo city
I've also been running the 203* for about 18mos or so...with no problems here in the heat of south Texas. Maybe it's just in my mind, but I tend to believe the info about the engine running more efficiently and better at just a little warmer temp. I don't regret the few dollars spent and time it took to make the swap.
Lead Driver
Joined: Jun 2003
Posts: 8,298
Likes: 25
From: Damon (South East Texas)
I've also been running the 203* for about 18mos or so...with no problems here in the heat of south Texas. Maybe it's just in my mind, but I tend to believe the info about the engine running more efficiently and better at just a little warmer temp. I don't regret the few dollars spent and time it took to make the swap.
Posting Guru
Joined: Jan 2008
Posts: 1,661
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From: Bridgewater, VA
Been looking at this also, any noticeable difference or SOTP feel (even though i don't imagine a SOTP difference would happen, but wth i'll ask lol). Sorry, not trying to hijack, just adding on to ur ? i guess
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
No difference.
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Postmaster
Joined: Nov 2006
Posts: 4,196
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I didn't notice a difference when I installed my 203* and billet housing. My truck heats up faster in the winter which is a plus!!
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