KNOWN INFO                         TEST OPTIONS            Visual Inspection     REASON FOR QUESTION                 KNOWN INFO                         TEST OPTIONS            Visual Inspection     REASON FOR QUESTION            POSSIBLE PROBLEMS        4. YES NO 3. NO YES        POSSIBLE PROBLEMS        Tighten connections, clean cooling fins, or replace charge air cooler (para 6-2). d1. ENGINE OVERHEATS (CONT) Coolant level OK. Radiator core free of debris. WATER TEMP gage OK. Radiator OK. Upper and lower coolant hoses OK. Radiator cap OK. Radiator overflow tank and hoses OK. Cooling system pressure OK. Faulty radiator fan shroud. Faulty charge air cooler. Faulty water pump. Faulty thermostat. Faulty fan clutch. Is radiator fan shroud secure and free from damage? If damage is present, radiator fan shroud is faulty. Tighten radiator fan shroud hardware or replace radiator fan shroud (para 6-4). Is charge air cooler secure and free from damage? If damage is present, charge air cooler is faulty. Coolant level OK. Radiator core free of debris. WATER TEMP gage OK. Radiator OK. Upper and lower coolant hoses OK. Radiator cap OK. Radiator overflow tank and hoses OK. Cooling system pressure OK. Radiator fan shroud OK. Faulty charge air cooler. Faulty water pump. Faulty thermostat. Faulty fan clutch. TM 9-2320-365-20-1 2-134          Change 1