Thermostat on 2005 aviator location - 2004 Lincoln Aviator

Removal & Installation

• 4.6L & 5.4L SOHC ENGINES
• 5.4L & 6.8L ENGINES
• 5.4L DOHC ENGINE
• 6.0L DIESEL ENGINE

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4.6L & 5.4L SOHC Engines

1. Partially drain the engine cooling system to a level below the thermostat.
2. Disconnect the upper radiator hose from the water outlet adapter.
3. Remove the power steering reservoir upper mounting bracket.
4. Remove the bolts and remove the water outlet adapter.
5. Remove the water thermostat and the O-ring seal. Discard the O-ring seal.
6. Installation is the reverse of the removal procedure. Tighten the water outlet adapter bolts to 18 ft. lbs. (25 Nm). Tighten the power steering reservoir upper mounting bracket as shown in the accompanying illustration.
   
   

   Fig. View of the power steering reservoir upper mounting thermostat on 2005 aviator location - 0996b43f80204ea3.jpgng specifications
   
   
   

   Fig. Exploded view of the water outlet adapter and tightening specifications
   

5.4L & 6.8L Engines

1. Partially drain the cooling system to a level below the thermostat.
2. Disconnect the upper radiator hose.
3. Remove the coolant outlet connection, as follows:
   1. Remove the bolts.
   2. Remove the coolant outlet connection.
   Remove the (A) coolant thermostat and the (B) O-ring seal.
   3. Discard the (B) O-ring seal.
      
      

      Fig. Remove the (A) coolant thermostat and the (B) O-rthermostat on 2005 aviator location - 0996b43f80204ef1.jpg

   
   To install:
   
   NOTE Thermostat must be installed as illustrated.
   
   1. Use a new (A) O-ring seal to position the (B) coolant thermostat in the (C) upper intake manifold.
      
      

      Fig. Use a new (A) O-ring seal to position the (B) coolant thermostat in the (C) upper intake manifold
      

   2. Install the coolant outlet connection, as follows:
      1. Position the coolant outlet connection on the upper intake manifold.
      2. Install the bolts and tighten to 15-22 ft. lbs. (20-30 Nm).
      
      
   3. Connect the upper radiator hose.
   4. Fill the cooling system.
   
   
   1. Before servicing the vehicle, refer to the precautions section.
   2. Partially drain the cooling system to a level below the thermostat.
   3. Disconnect the upper radiator hose. thermostat on 2005 aviator location - 0996b43f80204ef0.jpg">Remove the coolant outlet connection, as follows:
      1. Remove the bolts.
      2. Remove the coolant outlet connection.
      
      
   4. Remove the (A) coolant thermostat and the (B) O-ring seal.
   5. 
      
      

      Fig. Remove the (A) coolant thermostat and the (B) O-ring seal
      

   
   To install:
   
   NOTE Thermostat must be installed as illustrated.
   
   1. 
      
      

      Fig. Use a new (A) O-ring seal to position the (B) coolant thermostat in the (C) upper intake manifold
      

   2. Install the coolant outlet connection, as follows:
      1. Position the coolant outlet connection on the upper intake manifold.
      2. Install the bolts and tighten to 15-22 ft. lbs. (20-30 Nm).
      
      
   3. Connect the upper radiator hose. thermostat on 2005 aviator location - 0996b43f80204ea5.jpgpan>Fill the cooling system.
   
   

   
   5.4L DOHC Engine
   
   

   1. Partially drain the engine cooling system to a level below the thermostat.
   2. Disconnect the upper radiator hose, the heater water inlet hose and the heated PCV inlet hose from the water outlet adapter.
      
      Remove the water hose connection and thermostat.
   3. Installation is the reverse of the removal procedure. Tighten the mounting bolt to 18 ft. lbs. (25 Nm).
      
      

      Fig. Exploded view of the thermostat-5.4L DOHC engine