2018 SXT 180 Thermostat - Dodge Challenger Forum: Challenger & SRT8 Forums
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post #1 of 14 (permalink) Old 02-20-2019, 07:41 AM Thread Starter
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2018 SXT 180 Thermostat

I have been doing a little research but can't seem to find what I'm looking for. Does anyone know if there is a 180 Degree Thermostat that is compatible with the SXT V6? I believe the stock is 195-200 degree.
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post #2 of 14 (permalink) Old 02-20-2019, 08:14 AM
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Originally Posted by ambrosioian View Post
I have been doing a little research but can't seem to find what I'm looking for. Does anyone know if there is a 180 Degree Thermostat that is compatible with the SXT V6? I believe the stock is 195-200 degree.
Welcome to the forum.

Stock is 203F. Going to a 180F make cause a DTC especially if you live in the northern states.

I think Ripp sells them for the 3.6.
https://rippmods.com/products/2012-2...deg-thermostat


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post #3 of 14 (permalink) Old 02-20-2019, 08:16 AM Thread Starter
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Welcome to the forum.

Stock is 203F. Going to a 180F make cause a DTC especially if you live in the northern states.

I think Ripp sells them for the 3.6.
https://rippmods.com/products/2012-2...deg-thermostat
Okay cool. Thankfully I live in Arizona, so no issues there. I'm just getting an idea of what mods there are and things I can do down the line.
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post #4 of 14 (permalink) Old 07-09-2019, 10:56 AM
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Ripp work pretty good !
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post #5 of 14 (permalink) Old 07-09-2019, 12:22 PM
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Ripp work pretty good !
Did you modify the tune so the fans turn on at lower temps? If not, the car will run close to stock temps in stop and go traffic...but at highway speeds you should see cooler engine temp.
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post #6 of 14 (permalink) Old 07-10-2019, 12:53 AM
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https://www.mishimoto.com/jeep-wrang...mostat-12.html

I don't know if any advantage to a 180 thermostat to be honest

A Guy


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post #7 of 14 (permalink) Old 07-10-2019, 09:35 AM
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I will second @A Guy ’s assertion about running a 180F thermostat in a 3.6L - it is unlikely to provide any beneficial results to the average daily driven 3.6L Challenger.

There are some who even say that particular mod on this particular engine can result in a loss of performance and reduction in operational efficiency of several engine components. I am one of those people, though I believe the negative results are relatively minor and likely not noticeable to the average driver.

However that doesn’t mean the cumulative effects of the negative results couldn’t be noticed once enough time and miles have been logged with the 180F thermostat in a 3.6L.

Bottom line: unless you are addressing a specific need that requires a lower temp thermostat (and can adjust the PCM’s various fan settings accordingly), you should run the stock temp thermostat in a stock (or even lightly modified) 3.6L.

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post #8 of 14 (permalink) Old 07-10-2019, 09:48 AM
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I believe the manufacturer has reasons for choosing what temperature an engine maintains stock. Sometimes retaining heat is advantageous, and various efficiencies may depend on it. If it were for gas mileage only, and changing it resulted in great power increases, and power was your primary concern, then yes, by all means. But I doubt that is the case. I do think the temps it runs stock have to do with fuel economy as well, but these 3.6L engines are pretty much optimized. Not saying a tune and a 180 thermostat will not net you some HP, almost certainly will, but more than a tune alone?

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post #9 of 14 (permalink) Old 07-10-2019, 09:57 AM
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Agree with those above. I wouldn't mess with the thermostat in these cars. Manufacturers spend a fortune and a ton of time to determine the best thermostat temperature to use for their engines.
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post #10 of 14 (permalink) Old 07-10-2019, 10:15 AM
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The stock thermostat temperature of 203F that Dodge uses is in line with all other automotive manufacturers’ stock thermostat temps for the engines in vehicles sold in the US. At first glance that might seem very odd that every manufacturer came to the same conclusion when deciding what temp to have their engines’ thermostats open up, given they never agree on anything else with regards to how their engines should operate.

The fact is it’s no coincidence. That temperature, or 100C to be more precise, is the temperature at which modern engine oils are certified to deliver the advertised specs. That’s the temp they get tested at, and that’s the temp at which they will do what the oil company promises they will do - maintain certain viscosity with advertised shear rates, etc.

To operate an engine at a temperature other than the 100C means inefficient behavior from the engine oil and then from the engine itself as a result. Is the difference significant? No, not in an immediately noticeable sense. But less than ideal behavior from the engine oil, and the resulting inefficiencies of the engine itself, will eventually add up to noticeable results over time.

Maybe that takes so long the original owner will have gotten rid of it by then. Maybe not...

Food for thought.

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