Lincoln Navigator: Engine Cooling - 3.5L EcoBoost (272kW/370PS) / Degas Bottle. Removal and Installation

Special Tool(s) / General Equipment

Materials

Removal

  WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

NOTE: Removal steps in this procedure may contain installation details.

1. 
   
   

     WARNING: When releasing the cooling system pressure, cover the coolant expansion tank cap with a thick cloth.

   Release the cooling system pressure by slowly turning the degas bottle cap between 2 and 3 turns and remove the degas bottle cap.
   

1. Using general tools, clamp the lower expansion tank hose and syphon the engine coolant from the expansion tank.
   Use the General Equipment: Fluid Suction Gun
   Use the General Equipment: Locking Pliers

1. • Release the clamps and disconnect the upper coolant hoses.
     Use the General Equipment: Hose Clamp Remover/Installer
   • Remove the spring clip and disconnect the lower coolant hose.
     
   • Remove the bolts and the degas bottle.
     Torque: 62 lb.in (7 Nm)

Installation

1. To install, reverse the removal procedure.
   

1. NOTICE: Use Motorcraft® Orange Antifreeze/Coolant for vehicles built up to 08-July-2018 and Motorcraft® Yellow Antifreeze/Coolant for vehicles built from 09-July-2018. Failure to use the correct coolant can degrade corrosion protection.

   Fill the degas bottle with the recommended coolant mixture and fill level.
   Material: Motorcraft® Orange Concentrated Antifreeze/Coolant / VC-3-B (WSS-M97B44-D)
   Material: Motorcraft® Yellow Concentrated Antifreeze/Coolant / VC-13-G (WSS-M97B57-A1)