2014 KL 3.2l TrailHawk. Red1992XJ guessed right as one of the radiator hoses. Back story is that is started losing 1/2-cup a day after we had subzero temps and seemed to stop once it warmed up. I only noticed it because the heater started getting intermittently cool and the temp gauge started climbing as I was driving, which kinda sucked because as I mentioned it was damn cold out. Turns out that happens when you hit about 1/2-gallon low (yikes!). Well, it finally stopped raining and I stuck the pressure tester on there. It's kinda hard to look for a wet spot in the rain! You could only see the leak from underneath with a flashlight shining up. It had about a drip a minute on the lower end of the hose and just a little wet spot forming on the end by thermostat housing.




I couldn't even get my skinny little hands in there, so I pulled the airbox. Whoever designed that airbox and engine bay should be shot as it's a pain to even get the filter out, but once you have the filter out it's only one bolt on the fender and pulling upwards to get the lower half out off the rubber mounts. The lower "clamp" that was dripping is a pressed band and I didn't want to risk cutting the hose trying to dremel it off. Fortunately that pipe extends about an inch past that ring and there was plenty of room to just add another clamp. Of course that probably also means you can't buy just that short rubber section. There wasn't enough room to add a clamp by the thermostat housing, so I nipped that one off and replaced it. I didn't have to drain anything, and it was leak free for 1/2-hour under 20-psi pressure. I made sure to angle the clamps so I could still reach the screws once the airbox was back in place. Took me about 1-1/2 hours to fix, or at least bandaid this. Next time I feel like flushing the coolant, I'll replace that hose and see if anyone makes an aluminum thermostat housing.

 

Quick followup. For the 2014 with 3.2l only (2015+ seems to have changed the design?) Just the rubber piece is Dayco part number A70816, which Autozone carries for $7.99. The Mopar part number 68102127ac is the whole section including the metal pipe that runs across the front to the far end of the radiator for $45 - out of stock everywhere of course.

Also found this thread with part numbers for eliminating the other plastic quick connect on that tube.
https://www.jeepcherokeeclub.com/thr...r-pipe.243016/

 

Thanks for the info! Now I know where to start looking if I start losing coolant.

This is why I prefer my XJ over the KL. The XJ is incredibly easier to work on under the hood.

The only real good thing about the KL is the fuel economy. It can get 27mpg on the highway with the 3.2, and the ride is not bad at all.