Navigator 4WD V8-5.4L VIN 5 (2006)
Thermostat: Service and Repair
Thermostat and Thermostat Housing
Material
Removal and Installation
1. Drain the engine cooling system.
2. If replacing the thermostat housing, disconnect the upper radiator hose from the thermostat.
3. Remove the 2 bolts, the thermostat housing and the thermostat. Discard the O-ring seal.
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To install, tighten to 10 Nm (89 inch lbs.).
4. To install, reverse the removal procedure.
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Inspect the sealing surfaces. Clean the sealing surfaces with metal surface prep. Follow the directions on the packaging.
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Install a new O-ring seal.
