2014 Ram 1500 5.7L Thermostat

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jawzs2

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Look one up for a 2500\3500, pretty sure it'll list either a 192 or 195 degree t/stat, can't remember which, but that's what I put in my 2010 1500.
 

Bigskyroadglide

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This is what I have in my 14 RT. It's essentially a 192. My engine temp runs 195

The one I replaced was a 203. I looked for it in my garage but couldn't find. I may have thrown it out.
 

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ramffml

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Well, here's a question, what's the point? Does a 10* cooler stat make much of a difference? What does it improve?

It gives me headroom while towing, and probably also decreases wear. Before I did the changes to my truck (which included removing AGS and swapping to 180), I would tow in the summer and sit around 110C, while going up a large grade it would hit 120C. Now I tow around 105 and hit 110 up the same grade.

So it doesn't decrease the peak temps you will get, but it increases the amount of time it takes to hit peak temps because you start at a lower temperature.
 

DILLIGAF

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180s should of been in from factory day 1. But its probably EPA ******** like the rest of the useless crap they have on this engine that you have to remove to get it running right.
 

Racer9

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OK, so since I removed the clutch fan and went to V6 electric fan only, and I know the fan is usually running when I get ready to shut the truck off, it would make sense for me to replace mine also. My truck is only driven in summer, for cruiser/show with some runs on the strip, and I lowered the fan on temp with my Diablo.
So a 180* would be better for me?
 

ramffml

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OK, so since I removed the clutch fan and went to V6 electric fan only, and I know the fan is usually running when I get ready to shut the truck off, it would make sense for me to replace mine also. My truck is only driven in summer, for cruiser/show with some runs on the strip, and I lowered the fan on temp with my Diablo.
So a 180* would be better for me?

Yes, it doesn't make much sense to turn on the fan sooner when the Tstat isn't opening up any earlier.
 
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Cobra514

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This is what I have in my 14 RT. It's essentially a 192. My engine temp runs 195

The one I replaced was a 203. I looked for it in my garage but couldn't find. I may have thrown it out.
Thank you for that info. I was trying to find something in that range. Lots of people in love with the 180, but it's not uncommon to hit -10F or -15F where I'm at so I'll take the extra 12 degrees, lol. Seems that's what the engineers wanted early on anyway because that's what's in the FSM (and after much research on the internet I've now found many folks who were running 195-ish from new). I see why people might want lower or higher. There is valid rationale for either. To each his own. Just call me Goldilocks, lol.
 
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Cobra514

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What temp does your electric fan kick in at.Your truck should have 2 fans a mechanical fan,and an electric fan ahead of it,inside the shroud, that's usually dedicated for the A/C. Being a 14 i wouldn't be surprised if it hasn't been tuned to turn the electric fan on at around 195/200F. If so throwing a stock 203 t-stat back in it,might cause the electric fan to run constantly.Find out at what temp the electric fan kicks in at,before you swap the thermostat.Put the evicc on engine info,so you can monitor the engine temp in real time to check the e-fans operation.
Yes! Thank you for that bit of info. Regardless of what I stick in there I will check the fan temperature thresholds. Lots of good info on here. By the way, although I don't have a bunch in my hands, I found a few pictures of the mopar parts ending in "AI" (old) and "AJ" (new) and I see "203" stamped on both. So seems for a while now that's been the "real" number just as you stated (even though Mopar sells them as 195s). I trust the stamp. I've found oodles of people who are reading 195-200 range with stock tstats, but they are early Gen 4 vehicles. Either they really did have a different part back then or they are smoking something (or both these days, lol). Can't explain that data.
 
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