2018 jku cylinder one misfire turned into catastrophic engine failure.
Pretty bummed. I’ve wanted a jku for years now. Finally bought a 2018 golden eagle. Owned it for about five months and love it! Then one day check engine light comes on for cylinder one misfire. Jeep overheated on the way home. I bought six coils and spark plugs hoping that would eliminate the issue. It did not. I checked the compression on all six cylinders and had 150psi across the board. I checked ohms on all injector and got around 14 ohms room temperature on all six. I swapped injector one with three just to try. Still misfiring still overheating. I then drained the coolant in the radiator and changed the thermostat. Noticed the coolant in radiator was low and whenever I topped it up after running the engine to bleed the system the coolant would gush out of the radiator when removing the cap. After about the third heat cycle while bleeding the cooling system the Jeep started puking white smoke out of the exhaust. Mind you the Jeep ran for maybe forty or fifty miles after the check engine light came on. I had it towed to the dealer who told me the head gasket failed and leaked coolant into number one cylinder and potentially hydro locked the cylinder. They are telling me the best course of action is to replace the engine for $12k. I put ten thousand miles on it since I had it. It’s at 104500 now. I really loved this Jeep but now I’ve got a sour taste in my mouth.
