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Discussion Starter #1
i was wondering is anyone using the 203 thermostat going to changing my anti-freeze thinking about trying it
 

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I am that hot
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1,762 Posts
Um no its a waste of money..... Running hotter is always bad, the one we have stock is good enough...
 

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I've been running the "DieselSite" 203* t-stat and billet housing for over a year w/ CAT-EC1 coolant. Outstanding performance from the combo. I just did a run (LaborDay) through AZ. It was 105-110*, needless to say it was a teaspoon of hell. Anyhow, rock solid guage, NO movement from it's normal operating temp. Go for it! The case has been made by this outfit.
 

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The only difference that I can tell is that the fan comes on more often. Next time I replace the t-stat, I will save some money and use a normal one.
 
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