Download Some 2003-2005 Excursion, 2003-2007 F-Super Duty and 2004-2008 E-Series vehicles equipped with a 6.0L engine may experience engine oil, transmission fluid or diesel fuel contaminating the cooling system. This flushing procedure is to be performed after the source of the cooling system contamination has been identified and repaired. ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE Follow the steps in sequence to effectively repair the vehicle: • Drain cooling system contaminates. • Clean cooling system with Simple Green® Heavy Duty Cleaner and Degreaser. • Clean cooling system with Motorcraft® Engine Cooling System Iron Cleaner. NOTE ALL STEPS MUST BE COMPLETED IN ORDER TO PROPERLY CLEAN THE COOLING SYSTEM. ANY DEVIATION FROM THE SERVICE PROCEDURE WILL RESULT IN SHORTENED COOLANT PROTECTION AGAINST CORROSION IN THE COOLING SYSTEM.