My sons 2018 JLU had the same issue. Seems "kinda" common for that year (under torqued head bolts passenger side). We replaced the head gasket, and now it runs better than ever. Big job though...gotta remove the timing cover and everything in front of it.
On that note, it seems very uncommon for...
iKamper mini (125 lbs), Billie bars 8" rack (50 lbs and can still open my factory mopar tonnueu). All my bedding fits inside and I like the low profile for less wind and better clearance in the woods. I just use totes with my camping stuff in the bed. Easy to get together for a trip.
Come in North of Moab I-191 onto Salt Valley-Yellow Cat, then take a right over to Tower Arch, come back down to 10 Mile Valley, eye of the whale, then to Willow springs trail (see the dinosaur tracks), then head north up to Copper ridge. Its a beautiful loop, nothing that challenging (just a...
Get a big efffing adjustable wrench from tractor supply and tighten as tight as you can, then paint mark em. Did that on my clayton arms and they haven't moved. Plus, that big adjustable will come in handy at some point later.