Re: 1999 Jeep 4.0 Overheated, then started ticking and missing
I, too have been bitten... I bought pretty much the same thing last winter, 1999 4.0 4x4 AT, "blown" engine. I doubt looking under the valve cover will tell you much. Mine got so hot the #1 piston started to come apart, welding aluminum onto the cylinder wall. That caused the wrist pin to oval out the hole in one side of the piston, which was where the "ticking" was coming from. I replaced #1 and #2, honed all 6, water pump, thermostat, and the hoses. The lower hose had a slit, which caused it to pee out all it's coolant. Whoever owned it before just didn't stop soon enough. Good luck!