NHTSA Complaint #11668118 — 2006 JEEP COMMANDER

Radiator coolant system failed and caused the engine to overheat and loss of power while traveling on an interstate highway. Pulled over to side of highway. The vehicle was towed to a private mechanic shop. The shop evaluated the engine could not start as it had seized from overheating. It was determined that the radiator plastic end caps suddenly failed causing the engine to overheat and seize. The radiator temperature is very high and the plastic and aluminum materials expand and contract at different rates therefore weakening the connection between the two materials until the part fails. This is a bad design, application, and mix of materials in a part that does follow the basic principles of thermodynamics.