What is the best 180 degree thermostat

[seems fishy]

I am in the market for a 180 degree thermostat.I ordered a Jet Performance thermostat.I read Mopar has one but I can't order it as I found only one on an American website that doesn't ship to Canada.When I tried it was about $200.00,because of the excahnge rate and shipping.I bought the Jet Performance for 100 bucks,in Canada,still pricey.
Anyone on the forum have a 180 thermostat they are confident with,meaning reliability.From reading you cannot beat the quality of OEM,that each car company makes for it 's own vehicle(unless we are talking recent early twin turbo sixes).
I have a 2023 Classic 5.7.I just want a thermostat to compliment my 93tune.I already adjusted my fans.
From reading articles,I am left with the impression aftermarket units do NOT last as long as the hemi oem unit,rated at 10years.
There are many 180's to choose,and some have better ratings overall,but they all seems to have higher failure rates than oem.
I just would hate to overheat my motor with one episode of thermostat failure.

Twenty or forty years ago it was common to change out thermostats every other rad flush that was common every two years.Those intervals do not exist anymore.
I want to hear suggestions from anyone who has one to recommend.

 

[Wild one]

Talk to @Ken226 and @EdGs about the ones they're using. "Always" check every new thermostat you buy,before installing it,in a pot of water on the stove and use a meat thermometer to check it's opening and closing temps. Just because it tests good on the stove,doesn't mean it'll last for any length of time,but at least you know it's functional when you installed it

 

[EdGs]

Bought a Motorad 192° thermostat, it checked good on stove but didn't last 9 months in use.

Started opening way late, and caused me to have coolant temps 230° +.

No bueno, in my book.

Using a Calorstat 192° now. No issues so far, I rarely see temps of 204° now.

 

[EdGs]

Calorstat also makes a 180° tstat.

 

[G-Ride990]

I had a Mr Gasket 180* in my 2016 for many trouble free years. I have had one in my 2022 for a couple years now too and it's worked fine. And I bought my dad one for his 5th gen which has also been great.

So Mr Gasket is my choice. But I don't have more than a few years of info to go off of. I would imagine they would all last a few years at least?

IMO, just don't buy anything that really matters from Amazon. So much fake crap on there these days. I bought these Tstats from moes-performance.com

Mr Gasket 180* Thermostat for 5.7L, 6.1L, 6.2L, and 6.4L Hemi

Mr Gasket 180* Thermostat for 5.7L, 6.1L, 6.2L, and 6.4L Hemi

www.moes-performance.com

 

[Ken226]

I got about a year and a half on my Calorstat 192*. The same one Ed linked up above.

So far, so good.

Overheat, HELP!

I miss my 1989 D-150. The D-150 is absolutely on my short list. It'll probably be my first project after I retire and get moved. I'll buy an old junker and rebuild and repaint it. I may even go with a Gen3 Hemi and use an aftermarket EFI system. Those kind of computers, i have no trouble...

www.ramforum.com

 

[04fxdwgi]

wish I could add something to this, as my stat holds right at 197, so it has been changed somewhere along the line. Has been like that since I have had the truck (93 k on it when I bought it), almost 4 years.

So, they are out there, just cant say which one.

 

[GeauxinUp]

I had a Mr Gasket 180* in my 2016 for many trouble free years. I have had one in my 2022 for a couple years now too and it's worked fine. And I bought my dad one for his 5th gen which has also been great.

So Mr Gasket is my choice. But I don't have more than a few years of info to go off of. I would imagine they would all last a few years at least?

IMO, just don't buy anything that really matters from Amazon. So much fake crap on there these days. I bought these Tstats from moes-performance.com

Mr Gasket 180* Thermostat for 5.7L, 6.1L, 6.2L, and 6.4L Hemi

Mr Gasket 180* Thermostat for 5.7L, 6.1L, 6.2L, and 6.4L Hemi

www.moes-performance.com

 

[Wild one]

I am in the market for a 180 degree thermostat.I ordered a Jet Performance thermostat.I read Mopar has one but I can't order it as I found only one on an American website that doesn't ship to Canada.When I tried it was about $200.00,because of the excahnge rate and shipping.I bought the Jet Performance for 100 bucks,in Canada,still pricey.
Anyone on the forum have a 180 thermostat they are confident with,meaning reliability.From reading you cannot beat the quality of OEM,that each car company makes for it 's own vehicle(unless we are talking recent early twin turbo sixes).
I have a 2023 Classic 5.7.I just want a thermostat to compliment my 93tune.I already adjusted my fans.
From reading articles,I am left with the impression aftermarket units do NOT last as long as the hemi oem unit,rated at 10years.
There are many 180's to choose,and some have better ratings overall,but they all seems to have higher failure rates than oem.
I just would hate to overheat my motor with one episode of thermostat failure.

Twenty or forty years ago it was common to change out thermostats every other rad flush that was common every two years.Those intervals do not exist anymore.
I want to hear suggestions from anyone who has one to recommend.

If you drive it in the winter,i'd hang onto the original T-stat and swap it back in ,in the fall. Also gives you a good chance to keep fresh anti-freeze in the system,as what you lose on the t-stat swap,just top up with new anti-freeze.Saves having to do a coolant flush and swap every couple years.
The Hemi's are easy to swap t-stats on,so it's not a big deal to swap it twice a year,that's what i do over here in Alberta,the factory 203 goes back in usually late Oct /early Nov and stays there till about early April.The heater works alot better in the winter with the 203 then it does with a 180

 

[seems fishy]

Thankyou for your opinions.I am definitely going to check the Jet 180 tstat. in hot water before installing.The comments are valuable.I will try some recommended brands next time.I just bought a UPR catchcan

......SIDENOTE........

****** I am from Canada.Just a side note about my UPR,CATCHCAN, I purchase it for $218.00..USD translates to
$315.00CDN.
$118.00 BORDER FEEs $74.00CDN SHIPPING UPS(5day)
= ONLY $507.00 ((CDN),........







I was also wondering if I should switch before it goes down to -20,degree,as well .[ I Googled AI ,and it told me to just leave the 180 in the truck] . I think I am going to switch the thermostat(203 & 180),like 'Wild One ' said therefore ,every 6months(Spring and Fall) .I have learnt AI isn't reliable, a while ago..I am likely going to replace the,180tstat,every other year,like back in the 70's,because they seem abit iffy on longevity.40 years ago that was standard with every 2 year Prestone antifreeze change.I drove for CAA,back then.Mostly we did boosts and overheated cars in the sumner.Many friendly visitors from the USA who broke down after travelling long distance,and a few from Europe. ..(they did not drive to get to Canada,obviously)

I clearly remembering,a guy on the 403 in Oakville I stopped for (we stopped for anyone stuck on the hiway,back then,member or not,as a courtesy,for free,and now in2026,it's closer to 600 bucks,for a non member).He had a closed stuck theromostat,and he had just quit his manager job at a place, that was called the 'RadMan'.He was mad cause he didn't change out his thermostat there prior to quiting.I handed him a long screwdriver and a hammer,and he punched a hole through the thermostat while it was still in the housing.That was all you could do with cars and trucks wizzing by at 70mph on a hot day.
I don't want to end up like him.

 

[Wild one]

Thankyou for your opinions.I am definitely going to check the Jet 180 tstat. in hot water before installing.The comnents are valuable.I will try some recommended brands next time.I just bought a UPR catchcan as well.I was also wondering if I should switch before it goes down to -20,degree,as well .[ I Googled AI ,and it told me to just leave the 180 in the truck] . I think I am going to switch the thermostat(203 & 180),like 'Wild One ' said therefore ,every 6months(Spring and Fall) .I have learnt AI isn't reliable, a while ago..I am likely going to replace the,180tstat,every other year,like back in the 70's,because they seem abit iffy on longevity.40 years ago that was standard with every 2 year Prestone antifreeze change.I drove for CAA,back then.Mostly we did boosts and overheated cars in the sumner.Many friendly visitors from the USA who broke down after travelling long distance,and a few from Europe. ..(they did not drive to get to Canada,obviously)

I clearly remembering,a guy on the 403 in Oakville I stopped for (we stopped for anyone stuck on the hiway,back then,member or not,as a courtesy,for free).He had a closed stuck theromostat,and he had just quit his manager job at a place, that was called the 'RadMan'.He was mad cause he didn't change out his thermostat there prior to quiting.I handed him a long screwdriver and a hammer,and he punched a hole through the thermostat while it was still in the housing.That was all you could do with cars and trucks wizzing by at 70mph on a hot day.
I don't want to end up like him.

These days if you have a functioning thermostat "Do Not" swap it out just because it's a year or 2 old. Very good chance the new one you replace it with,will turn into a dud.
Little tidbit for you,if you get a couple months out of that Jet thermostat count yourself lucky,as they have about the worst rep of all the thermostats these days.I went through 3 of them in less then 6 months.
New thermostats aren't like the old ones that used a bi-metal spring,now-a-days they use a wax pellet/motor,and aren't anywhere near the quality the old bi-metal spring versions were.
You want a totally fail safe version,there's always the restrictor plates that are sold by a few outfits like 797 Performance,or you can make your own by gutting a factory t-stat

 

[seems fishy]

Maybe I will cut up my new Jet Performance tstat and give that concept a try,based on your review of it. I ordered that only because it looked like a good bet ,at the time but I trust your judgement. That was almost $ 100.00.Price does not reflect quality(I'll have to remember that).I am new to 180 thermostats.
I went to 797 Performance site

because,I didn't know it existed . I read up on that restrictor plate product ,because it's new to me ...[not much different from the hiway repair,the Rad man did on his tstat,50years ago...]
thankyou.I assume warm ups would take abit longer,however,but by how much,is hard to say.I just picked up a catch can to deal with the cooler combustion issues,so maybe , 797Perf.,.may get an order from me one day Do you know anyone who has used their product?

 

[seems fishy]

The restrictor plates cost the average price or same as a decent thermostat.(I use the word decent loosely)Definitely change those plates out for a 203 degree tstat,in the winter.IT does say they are for racing so I'd wonder about complications with slow warm ups

 

[Wild one]

Maybe I will cut up my new Jet Performance tstat and give that concept a try,based on your review of it. I ordered that only because it looked like a good bet ,at the time but I trust your judgement. That was almost $ 100.00.Price does not reflect quality(I'll have to remember that.I am new to 180 tbermostats.
I went to 797 Performance site

because,I didn't know it existed . I read up on that restrictor plate product ,because it's new to me ...[not much different from the hiway repair,the Rad man did on his tstat,50years ago...]
thankyou.I assume warm ups would take abit longer,however,but by how much,is hard to say.I just picked up a catch can to deal with the cooler combustion issues,so maybe , 797Perf.,.may get an order from me one day Do you know anyone who has used their product?

I have a buddy out here in Red Deer who makes the same plate,and he's got a pile of them running around in Alberta with no issues. He went through 2 Mr Gasket 180 t-stats on his modded Super Stock Hellcat,and the 2nd one disingrated and damn near took out his water pump,that's when he started making the plates. I have 2 of them at the moment,and use them during the summer.Warm up does take a bit longer,but if you're tuned for a 180 t-stat you'll be okay with a plate or a gutted thermostat

 

[Bigskyroadglide]

I am in the market for a 180 degree thermostat.I ordered a Jet Performance thermostat.I read Mopar has one but I can't order it as I found only one on an American website that doesn't ship to Canada.When I tried it was about $200.00,because of the excahnge rate and shipping.I bought the Jet Performance for 100 bucks,in Canada,still pricey.
Anyone on the forum have a 180 thermostat they are confident with,meaning reliability.From reading you cannot beat the quality of OEM,that each car company makes for it 's own vehicle(unless we are talking recent early twin turbo sixes).
I have a 2023 Classic 5.7.I just want a thermostat to compliment my 93tune.I already adjusted my fans.
From reading articles,I am left with the impression aftermarket units do NOT last as long as the hemi oem unit,rated at 10years.
There are many 180's to choose,and some have better ratings overall,but they all seems to have higher failure rates than oem.
I just would hate to overheat my motor with one episode of thermostat failure.

Twenty or forty years ago it was common to change out thermostats every other rad flush that was common every two years.Those intervals do not exist anymore.
I want to hear suggestions from anyone who has one to recommend.

I want to understand how you tuned your 23, I've been working on my 24 classic for 4 months and it's yet to be tuned. Are you Diablo or HP Tuners

 

[seems fishy]

I 've have had the (DiabloTrinity Platinum EX,with the 5inch screen) for about 5 months,and had good luck tuning with it.I viewed only one tutorial online,just to give me an idea of what I would be up against doing my first tune .There were some quirks,initially,like having a problem deleting MDS,but I had missed an update.AFTER updating was complete,it has been good, no issues tuning,with the update.When tuning it's good to have your truck battery fully charged.Seems to help things go well ,while flashing.
On occassion I have had to reboot it(but not while tuning/flashing,because that'll brick you PCM).I have a Linkswell T screen head unit in the truck,and that needs rebooting every so often too.It may be r/t having an Igla security system,installed.
I did not initally keep the 5inch screen in the car,after tuning the first time but it can warn you about pinging,etc ,(which is what I am concerned about).It is not an issue with the canned 93 tune,for me and I 'm using 94 octane,as a buffer.I don't have a cooler thermostat installed presently because I did not know they had issues before this week when I started shopping .I do not have any mods save for catbacks.I just RETUNED the truck, earlier this week to adjust my fans,(I was anticipating a new thermostat being delivered to me soon,however I see some new options perhaps instead) , and everything was predictable and worked as it should.
I'm 71,and I am not a computer Geek at all ,I find it user friendly
I understand people like the HP tuner better,and I understand it has some extra flexibility.I've recorded logs with the Diablo tuner , and though I haven't done this,load custom tunes.
Bigskyroadglide,if you have any problems I may be able to help and or,I have heard you can connect by phone at Diablo(you may have their # that came with the unit ),or on your computer,at there website.I never contacted them,myself,however,I hear they can send your unit updates specific to any issues you may have,via wifi to your unit.I am not sure if you have Diablo,or HP?

To be honest I just wanted the tuner initially to bump up my idle because my Mechman 370amp Elite alternator puts out less hydro at idle than the OEM alternator.[I put a larger pulley on it to prevent OVERSPINNING at only 5000rpm.] AFTER I figured,hell with this and adjusted pretty much everything since they are so expensive to purchase.. I kept my OEM computer,and paid the core charge,(and paid only just $800.00 CDN),in case I bricked the Unlocked computer. If I had a carburated vehicle I could have just turned a screw to do the same thing(for the idle)...that is progress

 

[seems fishy]

Has anybody tried using,a Stant Superstat? I was asking Google A.I. AGAIN, last night,what was the most reliable 180 thermostat was again( I couldn't sleep,because of thoughts of wax pellet failures in my head,instead of sheep),
and tonight it said it didn't like Jet
Performance anymore,and now really really likes Stant Superstat.A.I. is so flighty...

 

[stevieb92]

I realize this thread is in the 4th Gen section, but I have relevant experience. A few months after I purchased my 2024 Ram 1500 Rebel (5th Gen), I swapped the std thermostat for a Stant (now made my Motorad) 180 degree thermostat. It worked really well for over 2 years until a few weeks ago when the engine started running hot where it normally wouldn't. Typically, when I am running (not towing and unloaded) on the interstate around 70-75 mph in 60-70 degree weather, it would run between 190 and 205 degrees with the 180 thermostat. On one road trip, I experienced temps over 240 during the same conditions. The temps began creeping up past what I considered normal and I started watching it like a hawk. Normally, I watch the gauges anyway. Dropped the windows and put the heat on high to pull some heat from the coolant until I made it home. Replaced the thermostat and all is well again. Always watch your gauges and make note of anything unusual. I've used Stant thermostats for decades without any issues whatsoever. Until now.

 

[seems fishy]

Thank you for this Stevieb92,it seems IMO 2years is practically the lifespan of any of them.I am amazed someone can make vehicles going to the moon but haven't learned to make a decent 180 thermostat,since the beginning of the Industrial Revolution.I hate to say this(but),it seems fishy.At least from what I see Stant is reasonably priced..****You don't have a product # for that do you? ******MY Google A.I. keeps floating me different product numbers for Stant.I sent Stant an email on their website,just to ask that same question..

 

[Xsen]

Dunno whether you have TAMA branded thermostats in US, but they're supposed to be japanese. I've installed a TAMA WV64MC88 last week. It needs a bit of customization as it's diameter is 64mm, and HEMIs need 63mm. But that's easy.

Point is - it's 88C / 190F , which would probably be good during both seasons. Hopefully it will last too.