thebaconator

I'm looking at replacing my thermostat while i'm replacing the front end and was wondering what thermostat i should get.

Does it matter on the degree's.

I'm looking at a
Stant Superstat™ Super Premium Thermostat, 195 Degrees Fahrenheit

They also make it in 180* and 160* thermostats.


This is going to be an offroading toy only and just want to make sure i get the right parts.

NorCalJeep

I got the fail-safe one from Autozone that opens up around 185 degrees, but that's because i live in California. How hot does it get where you live?

Bustedback

195 is what is recommended.

thebaconator

Live in the Midwest. These last few weeks we been high 90's but typically it's mid to low 90's at the peak of summer for usually no more than a week or two.


I'll be taking this trail running and mudding on weekends and nights mostly so 90s or lower typically

cruiser54

Go to the dealer and buy 83501426. I went through 3 Superstats that opened too soon in the winter and caused fluctuations in temp in the summer. The factory stat seems really stable here in Arizona.

djb383

....off road toy only, in this heat....i'd give the dinky XJ rad a little head start and go with a 180 stat. At one time, the dealer sold a 180, don't know if they still do.

tjwalker

I agree with cruiser54. I've had mixed (poor) luck with many aftermarket stats including Stant.

Because of that, I buy my stats only from the Jeep dealership. They are about the same price as any aftermarket and they provide the best reliability and there is never a problem with "fluctuation" as there can be with some stats.

I recommend the 195 degree stat for the vast majority of 4.0 applications.

my89xj

Jw, I put it a 180 stat because it was getting to hot. But once winter comes around should I put a 195 back in it.

RTorrez1

If your cooling system is working correctly you shouldn't have to keep changing you t-stat. You should be able to use the 195deg stat without any problems. I run a 195 and my 98 stays between 210 and 212 even in 110deg temps in south Texas and I have never had a problem.

djb383

A properly functioning t-stat does one thing only....control MINIMUM coolant temp. The rest of the cooling system components, their condition along with ambient temps and driving conditions determine maximum coolant temps.

CCKen

Ageed.

I can't understand why people think that a lower temp setting thermostat will make their engine run cooler.

djb383

Six months from now a lower than stock temp stat will allow the motor to run cooler, but not now.

my89xj

The situation was it wouldnt pass inspections because it was "overheating" so they put a 180 in it. It's a renix but it still ran 210 215

djb383

Did a lower temp stat make it pass?

my89xj

Yes sir