F 150 4WD V8-5.4L Flex Fuel (2008)
Thermostat: Service and Repair
Thermostat - 5.4L (3V)
Material
Removal and Installation
1. Drain the engine cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding.
2. Remove the air cleaner intake pipe. For additional information, refer to Fuel Delivery and Air Induction.
3. If servicing the thermostat housing, release the clamp and disconnect the upper radiator hose from the thermostat housing.
4. Remove the bolts and the thermostat housing.
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To install, tighten to 10 Nm (89 lb-in).
5. Remove the thermostat and the O-ring seal.
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Discard the O-ring seal.
6. To install, reverse the removal procedure.
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Install a new O-ring seal and lubricate it with clean engine coolant.
7. Fill and bleed the cooling system.
