General Procedures - Engine Cooling System Flushing

Flushing

1. 1
   Add Motorcraft® Premium Cooling System Flush to the cooling system and follow the bottle label instructions.
   Refer to: Specifications (303-03C Engine Cooling, Specifications).
2. 2
   Drain the cooling system.
   Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding (303-03C Engine Cooling – General Procedures).
3. 3
   Remove the radiator.
   Refer to: Radiator (303-03C Engine Cooling, Removal and Installation).
4. 4

   NOTICE: The radiator internal pressure must not exceed 138 kPa (20 psi). This may cause radiator damage.

   Flush the radiator by reverse flushing, positioning the radiator so that the upper radiator hose is at the top and the high-pressure hose is at the top.
5. 5
   Remove the thermostat housing.
   Refer to: Thermostat Housing (303-03C Engine Cooling, Removal and Installation).
6. 6
   Flush the engine. Insert the high-pressure water hose into the engine through the lower radiator hose and flush the engine.
7. 7
   Install the thermostat housing.
   Refer to: Thermostat Housing (303-03C Engine Cooling, Removal and Installation).
8. 8
   Install the radiator.
   Refer to: Radiator (303-03C Engine Cooling, Removal and Installation).
9. 9
   Fill and bleed the cooling system.
   Refer to: Engine Cooling System Draining, Vacuum Filling and Air Bleeding (303-03C Engine Cooling - General Procedures).