TL* THE CONTACT OWNS A 2002 FORD F-250 SD. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, A LOUD ABNORMAL SOUND EMITTED FROM THE ENGINE COMPARTMENT. AFTER INSPECTING THE VEHICLE, THE CONTACT NOTICED THAT THE SPARK PLUG HAD EXPLODED OUT OF THE CYLINDER HEAD. THE FAILURE RECURRED SEVERAL TIMES. THE VEHICLE WAS TAKEN TO THE DEALER WHO ADVISED THAT THE ENGINE NEEDED TO BE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 84,000.