TL*THE CONTACT OWNS A 2005 FORD F-350. THE CONTACT WAS DRIVING APPROXIMATELY 60 MPH, THE DIESEL ENGINE OVERHEATED WITH SMOKE COMING FROM THE EXHAUST PIPE. THE VEHICLE WAS DRIVEN TO THE SIDE OF THE ROAD. THE ENGINE WAS TURNED OFF, AND RESTARTED AFTER WAITING UNTIL THE ENGINE COOLED DOWN. THE VEHICLE RESUMED OPERATION. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE FAILURE WAS CONTRIBUTED TO THE OIL COOLER AND EXHAUST GAS RECIRCULATION (EGR). THE VEHICLE WAS REPAIRED. THE MECHANIC ADVISED REPLACEMENT OF THE OIL PUMP AND FUEL INJECTORS. THE FAILURE MILEAGE WAS 160,000. THE CURRENT MILEAGE WAS 160,200.