Running cold....when hot...
'99 2.5L 60,800 miles
I had a wildly fluctuating temp gauge yesterday, I'd be driving around for....hours and it'd only be at 110 degrees, then shoot up to 1/4 of the way, then back down to 100. It even varied with turns and braking!
Took apart the t-stat housing and noticed the gasket was put in backwards (gasket on the engine, not on the housing).
Fixed it and put in a new 195* t-stat.
I drove it around and it was PERFECT. I can't emphasize how much better it drove. Idled smoothly, more power. Awesome drive...but it was only on water.
Drained the radiator and filled it with 50/50 anti-freeze.
Then I was spraying something next to the jeep and accidentally got some water on the inside (near the battery/distributor) and I got a check engine light. I pulled the neg terminal and let it dry out.
Started it up and idled rough (re-learning I guess?) but my temp was no longer normal. Now it doesn't fluctuate, but it still doesn't get anywhere near 210...stays at around 180ish.
I think I have a leak in one of my heater hoses though, would this cause that? Other than that, there's nothing wrong with my cooling system.