Lincoln Aviator: Engine Cooling - 3.0L EcoBoost / Removal and Installation - Thermostat

Special Tool(s) / General Equipment

Removal

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

1. Drain the cooling system.
   Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding (303-03A Engine Cooling - 3.0L EcoBoost, General Procedures).
   

1. Remove the air cleaner.
   Refer to: Air Cleaner (303-12 Intake Air Distribution and Filtering - 3.0L EcoBoost/3.0L EcoBoost – Hybrid (BQ), Removal and Installation).
   

1. • Detach the coolant hose retainers.
     
   • Release the clamps and disconnect the coolant hoses.
     Use the General Equipment: Hose Clamp Remover/Installer
   • Remove the bolt and position the degas bottle aside.
     Torque: 44 lb.in (5 Nm)

1. NOTICE: Cover the accessory drive belts to prevent coolant contamination of the belts.

   Completely cover the accessory drive belts with waterproof plastic.
   

1. Loosen the clamp and disconnect the upper radiator hose.
   Torque: 44 lb.in (5 Nm)

1. • Detach the coolant hose retainer.
     
   • Remove the bolts and the air cleaner support bracket.
     Torque: 93 lb.in (10.5 Nm)

1. Remove the bolts and disconnect the coolant outlet connector.
   Torque: 89 lb.in (10 Nm)

1. NOTE: The thermostat vent valve should be on top.

   NOTE: During installation verify the thermostat vent hole is at the 12 o'clock position.

   Remove the thermostat. Inspect the O-ring seal and replace it if necessary.
   

Installation

1. Install a new O-ring seal and lubricate it with clean engine coolant.
   Refer to: Specifications (303-03A Engine Cooling - 3.0L EcoBoost, Specifications).
   

1. To install, reverse the removal procedure.
   

1. Fill and bleed the cooling system.
   Refer to: Engine Cooling System Draining, Vacuum Filling and Bleeding (303-03A Engine Cooling - 3.0L EcoBoost, General Procedures).