One problem related to vehicle overheat has been reported for the 2002 Jeep Liberty. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Jeep Liberty based on all problems reported for the 2002 Liberty.
Car overheated, check engine light came on and steam poured out from under the hood on the highway. Mechanic used a scan tool and determined that there was a cylinder 2 misfire. Cooant was found in the cylinder and maybe the head gasket needed to be replaced. When the head was removed the gasket was ok but it was determined that the engine (long block) needed to be replaced. I have found other owners online who have had this same issue with the 2002 and 2003 Jeep Libertys. I am over the 7 year 70,000 mile powertrain warranty. Car was always maintained and regular oil changes were performed. No off-roading or towing done with this vehicle.