MUKAK

i recently changed the waterpump and tstat and i think my tstat dont open up.. my buddy told me just to remove the Tstat and run without one.. he said he does it on his cars...

should i?

1991Jeep_Man

Sure! Because the t-stat provides no real purpose... except regulating engine operating temperature, making sure your engine can even reach operating temps (try to in the winter climate), get you the efficiency that your engine was designed for by running at said temps, etc etc.

In all seriousness, run one. Get an OEM unit to save the hassle of dealing with cheap replacements. It takes all of an hour if that. Your friend... I can't speak for him. Running without a t-stat in a passenger vehicle makes no sense to me.

fatbill

your not gonna have very good mileage if you don't run a tstat, and if your cel isn't on it will be.

easy to change it out....my 11 year old son did ours last weekend, with supervision, of course.

and get a oem.

MUKAK

i live in Socal so it doenst get very cold here LOL and mine is a 89 renix so it doesnt have a CEL, why would i have bad mileage?

N20jeep

Takes longer to heat up, which affects fuel trim. Your mixture will be rich until st operating temp.

Absolutely zero reason to run without a thermostat

DieselDaze

I lived in los angeles my whole life and it does get cold not like out here but cold nontheless..And if you're traveling through the desert wheeling or going to the mountains you will have no heat... regardless you motor will not be efficient without a thermostat and because it will never reach operating temps it will burn more fuel....

but again its only money and a $4 thermostat so leave it out and burn around $20 extra a month in fuel, no biggie

kgm

Yeah it's good to know you can run no t-stat in case it breaks 1000 miles from civilization but just replace it.

Big David

Get a OEM stat, I went thru 3/4 Auto Zone brand cheapies until I found one that worked. No more. I'll get a MOPAR unit next time.

00SportXJ

As an actual bad side effect, your oil will start to get acidic and chew at the bearings if you run it that way for the long run. The oil needs to get up around 180 degrees before it can start cleaning out the water that causes the acid.

coloradocherokee

just run a tstat I don't see why you wouldn't want to it makes no sense

salad

"doesn't get cold here" Unless your ambient outdoor temperature is around 170 F, yes, it gets cold enough.

Lmao

RubberSideUp

I've run a reducer (looks like a big washer) as a backup when the thermostat failed. That worked well for me for a few years. You can drill a few small holes in the thermostat outer ring to ensure that if it fails, and doesn't fail in the open position, the water will still flow. Your best bet is to keep a spare thermostat and gasket or RTV in your toolbox just in case.