What's not broke about having a 195 stat and a gauge that indicates 170-180 most of the time?

 

I second this, OP get it checked. There's a reason we need 195 stats. 210 is the normal temp and that normal temp helps things move. Verify your concerns, don't go by what PO said they did or an autozone gives.

 

I've had her for just over a year and it ran the same temp year round, even in the high 90's low 100's around here mid summer. Im not sure what thermostat I have in it if any at all but I'm not even going to worry about it because it hasn't givin me any problems soo far.

 

After 30 min drive this is me running temp.

 

same thing with my waggy. it would run at 160 actually. put a 195 in, and it stays at 210 with no problems.

 

I will be checking my Tstat soon to see what it is with a 195 in hand. If 210 is the normal operating temp anything else is just wrong.

 

Actually, the normal factory operating temp "range" is 160 to 218 and anywhere in between. The factory gauge is rigged so that the needle points +/- the middle of the gauge as long as coolant temp remains within the normal parameters. Jeep, in there infinite wisdom, decided to print 210 in the middle of the gauge. Most other factory gauges just have a C and H with nothing in the middle. The ECU counts a normal warm-up cycle when coolant temp passes 160 (the low end of normal range). Likewise, the ECU turns on the efan at 218 (the high end of normal range). Nowhere in the FSM is "normal temp" or "operating temp" stated.....not 210, not 195, nothing other than a 195 t-stat was installed at the factory.

Stop and think about it....would coolant temps in freezing cold weather while running the heater be the same as coolant temps in triple digit hot weather while running the a/c?...........not likely but again most factory temp gauges indicate about the same (the middle) year round as long as coolant temps remain in a normal "range".

 

It just seems a little odd that a gauge would indicate +/-160, after 30 min of driving, when a 195 t-stat is most likely in place.......like maybe the gauge is wrong, stat is wacked, or both, or something.

 

Just a quick question, I put a 180 in my xj not to long ago,should I not have done that. And doesn't that mean that at one 180 the fan should be on?

 

I can only speak about post Renix OBD-II......the efan "on temp" is 218. FWIW, we've been running a 180 stat over 2 years now in our XJ dd.....heater works fine and mpgs r mid teens city, low 20s hi-way.

 

no. the sensor for the e fan is in the radiator. it goes on at 218 i believe. thermo has nothing to do with the fan coming on. e-fan comes on with max a/c or temps above 218.

says the md renix guy

 

I thought the Renix "fan on" temp was lower than 218 due to the fact that the Renix sensor is in the rad tank vs post Renix sensor being in the t-stat cover.

 

Sorry to thread jack,well I turning the car on and found fan Wasent getting power, should it always have power or is that normal

 

I believe the efan would only receive power, or ground, if the sensor was sensing a high enough coolant temp or the a/c compressor was engaged. Somebody help me out here.

 

Running below operating temp wears the engine faster, its not good to just let the engine operate at 160-170 degrees regularly, I would definitely try to get it running a little hotter