Expedition 2WD V8-5.4L (2009)
Thermostat: Service and Repair
Thermostat and Thermostat Housing
Removal and Installation
1. Drain the engine cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding See: Service and
Repair/Cooling System Draining, Filling And Bleeding.
2. If servicing the thermostat housing, disconnect the upper radiator hose from the thermostat housing.
3. Remove the 2 bolts, the thermostat housing and the thermostat. Discard the O-ring seal.
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Inspect the mating surfaces. Clean the sealing surfaces with metal surface prep and silicone gasket remover. Follow the directions on the
packaging.
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If necessary, install a new thermostat with the spring facing down.
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Install a new O-ring seal.
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NOTE: Make sure the thermostat housing is seated evenly by hand tightening the 2 thermostat housing bolts prior to final tightening.
To install, tighten to 10 Nm (89 lb-in).
4. To install, reverse the removal procedure.
