Thermostat- to run hotter or colder is the question - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 11-15-2012, 12:12 PM Thread Starter
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Thermostat- to run hotter or colder is the question

Hey there,

So this is something I have been thinking about for a long time I've heard a lot of good things about running a 203* and the info Dieselsite has is good information. but I have also heard people running a 180* like the one at Riffraff I will be moving to Tampa soon so its always warm and there will be a lot of city driving. Is the 203* still a good idea? Anyone who has done the 203* or 180* thermostat change your input would be much appreciated.
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post #2 of 11 Old 11-15-2012, 12:35 PM
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I asked the same question a while back, most of the replies were that international designed this engine to run at 203. I'd be interested to see what you find out though.


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post #3 of 11 Old 11-15-2012, 12:51 PM Thread Starter
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Thats what I've heard as well the link i posted above from Dieselsite has a good bit of info and they say raising the temp will make the engine work less which will increase you MPG not a lot about .5 G to 1 G. So I'm hoping someone on here has this mod and can verify that raising the temp is a good idea especially when I'll be in city traffic with already hot temperatures outside.
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post #4 of 11 Old 11-16-2012, 08:40 AM
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Also looking in to a new thermostat. 195* is the stock temp correct? Can't find a 203* at any of the local parts stores around here...



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post #5 of 11 Old 11-16-2012, 03:13 PM
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I installed the 203 degree thermostat earlier this year. Looking back, I think it's probably more hype than anything. I doubt that the 8 degree F change between the OEM and International part would make much of a difference.

If I were to do it again, I think I'd go with OEM.

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post #6 of 11 Old 11-16-2012, 04:44 PM Thread Starter
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Quote:
Originally Posted by eurotrashb5 View Post
Also looking in to a new thermostat. 195* is the stock temp correct? Can't find a 203* at any of the local parts stores around here...
I believe 195* is the stock temp. Dieselsite.com has them.
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post #7 of 11 Old 11-16-2012, 04:49 PM Thread Starter
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Quote:
Originally Posted by Devil Car View Post
I installed the 203 degree thermostat earlier this year. Looking back, I think it's probably more hype than anything. I doubt that the 8 degree F change between the OEM and International part would make much of a difference.

If I were to do it again, I think I'd go with OEM.
devil car why would you go with the OEM?
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post #8 of 11 Old 11-17-2012, 09:08 AM
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I only say that because the OEM is a little cheaper (especially when you factor in S&H) and can be purchased locally rather than having to wait for shipping. In all honesty, I'm not sure how much the 203* would cost if purchased directly from International rather than online.

Other than that, I think they are probably equally good.

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post #9 of 11 Old 11-18-2012, 07:25 AM
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Quote:
Originally Posted by Devil Car View Post
I only say that because the OEM is a little cheaper (especially when you factor in S&H) and can be purchased locally rather than having to wait for shipping. In all honesty, I'm not sure how much the 203* would cost if purchased directly from International rather than online.

Other than that, I think they are probably equally good.
The International 203* will not work for us. Theirs is a short stem, we need a long stem thermostat for it to work properly.


I went OEM.

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post #10 of 11 Old 11-18-2012, 09:49 AM
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Quote:
Originally Posted by Tj Krawler View Post
The International 203* will not work for us. Theirs is a short stem, we need a long stem thermostat for it to work properly.


I went OEM.
You are correct. I forgot that ours was different.

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