Thermostat: Service and Repair

Thermostat













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. Remove the Air Cleaner (ACL) assembly and outlet pipe.

3. If a new coolant inlet connection is being installed, release the clamp and disconnect the lower radiator hose from the coolant inlet connection.

4. Remove the 2 bolts and position the coolant inlet connection aside.
- To install, tighten to 10 Nm (89 lb-in).


5. Remove the thermostat and the O-ring seal.
- Clean and inspect the O-ring seal. Install a new seal if necessary.


6. NOTICE: The engine cooling system is filled with Motorcraft(R) Specialty Green Engine Coolant. Do not mix coolant types. Mixing coolant types degrades the corrosion protection of the coolant.

NOTICE: Motorcraft(R) Specialty Green Engine Coolant is very sensitive to light. Do NOT allow this product to be exposed to ANY LIGHT for more than a day or two. Extended light exposure causes this product to degrade.

NOTE: Lubricate the thermostat O-ring seal with clean engine coolant.
To install, reverse the removal procedure.


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