My 94 runs at 160 to 170 and the coolant flows through an LPG vaporizer, probably cooling it.

 

First off fix that on all the time crap. There is a reason it only comes on at curtain times. A human controlled switch is also a bad idea. Run it back to the original wiring.

Have you checked your mech fan. Is it operating correctly?

Edit: posted before I read the next page like a *******. Ignore the cluth crap

 

I suppose you enjoy burning a **** load of gas huh. MANUFACTURERS SPECIFY OPERATING TEMP FOR A REASON. YOU ARE WAY BELOW. that is almost as bad as high operating temps

 

Filling the LPG tank is more enjoyable than pumping gasoline, for sure, but most days I ride a bike.
And I was concerned enough about the temperature that I bought a new Stant 95 degree Celsius thermostat the first week I owned this Jeep...air from the heater was lukewarm on the trip home...
The Stant thermostat didn't include a gasket.
My mechanic said he could make a gasket, but has been too busy/out of town ever since. He wasn't home yesterday.
If I have to install the new thermostat myself, what kind of 'compound' sealer needs to be on the (homemade) paper gasket? (All I can see sealing the housing now is an orange, rubbery substance). Thanks.
PS: the sump contained barely 4 liters of dark, well used oil...now it has a 'safe' volume, and the oil seems to look new, burning the LPG...

 

Paper gasket works better than rtv in that application in my experience. Although the felpro's have a couple lines of silicone on their paper gasket.

That orange substance is rtv. Which while yes it will work if both surfaces are clean and clear of any dirt, oil, ect.

Also it sounds like a good flush is needed if your air is still luke warm.

Can you go to a auto parts store?

 

UPDATE: replaced fan clutch and drove from orlando to daytona few hours later, and back again in the morning for Jeep Beach. It's 120 mile round trip. She never over heated, but ran little over 210 the entire way with AC on. I was happy with that, but from what I gather is it's mud clogging the rad fins causing to run a little hot. I am going to pull the rad and try to clean as I just cant get to all the areas between ac condenser. thanks for all the tips.

 

Awesome. Yeah make sure you can get air through the radiatior. Even a small amount of mud can cause big issues

 

My XJ used to run right at 210. Since then I have flushed the cooling system, replaced the water pump and thermostat, filled with 50/50 oreilly coolant and replaced the defective electric fan. I now run around 190ish. Although on a hot day I still get up to about 210.

I have almost overheated my XJ when I was towing. The temp gauge went to about 240 before the dash started freaking out!.... I immediately pulled over and let the kettle cool before something really bad happened...

 

New XJ owner myself and noticed Saturday that my 4.0 would fluctuate between 190 and 210. Had me worried since I'm not used to a temp fluctuating that much so I've done some research and have seen that its designed to run between 195 and 210 depending on driving conditions. Anything above 210 is cause for concern. I'm going to continue to keep my eye on it, but I'm not as worried now as I was before.

 

Not really.....the engineers established "the red zone" as cause for concern.

 

Easy there Captain Capslock. A Jeep running LPG ain't stock. It might not even be using the original PCM (piggyback or carb). The 4.0's operating range is chosen considering fuel and emissions efficiency, using gasoline.

+1. Normal operating behavior turns on the E-fan at 218 (most models).

 

Auto parts stores are ~1 hour away, and a Jeep dealer also could have the paper gasket, or I could get gasket paper. And I have an old bottle of stuff called 'Gasket Goop', which could apply to each side of the paper.
I flushed the heater core in December, and then emptied the cooling system, by removing the lower radiator hose, draining what looked like just rusty water. If antifreeze was in there, it wasn't obvious. Then I filled it with rainwater, drained, refilled with rainwater, then filled with rainwater+mono ethylene glycol, which now looks perfect.
Also, my temperature gauge displays in degrees Celsius, and the scale doesn't seem exactly linear, so my estimate may have been rough, and the needle often aims between the 70(if that white line is 70) and the 100, so maybe about 85 degrees Celsius.
The photograph below was taken minutes ago, just after backing the Jeep out of the garage and onto the driveway.


The needle did get right up to 100 on a recent trip, climbing some hills.
I guess that could happen, even if a previous owner installed a 70 degree Celsius thermostat, instead of the 95 degree Celsius Stant I bought as a precaution, right?

 

I read that as captain cocklock at first. Wow. And I suppose I missed that fact.

 

95 is too hot, 195 fahrenheit works out to about 90 celcius. But it's not like the in-dash gauge is exactly accurate

 

I must have fat fingered my keyboard on the iPhone, I meant to type 220