Thermostat: Service and Repair

Thermostat - 3.0L (4V)













Removal and Installation

1. Drain the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.

2. Disconnect the lower radiator hose from the thermostat housing.

3. NOTICE: Early build vehicle cooling systems are filled with Motorcraft(R) Premium Gold Engine Coolant. Late build vehicle cooling systems are filled with Motorcraft(R) Specialty Orange Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant. Failure to follow these instructions may damage the engine or cooling system.

NOTE: To install, lubricate the thermostat housing O-ring seal with clean engine coolant. Use the same type of coolant that was drained from the system.

Remove the 2 bolts, thermostat housing cover, O-ring seal and thermostat.

- To install, tighten to 10 Nm (89 lb-in).

4. To install, reverse the removal procedure.
- Clean and inspect the O-ring seal. Install a new seal if necessary.

5. Fill and bleed the cooling system. For additional information, refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding.