Thermostat: Service and Repair

REMOVAL
1. Disconnect the battery ground cable.
2. Remove the air cleaner outlet tube.
3. Drain the engine coolant to a point below the water thermostat.





4. Disconnect the water temperature indicator sender unit and the engine coolant temperature sensor electrical connectors.





5. Disconnect the upper radiator hose and the heater coolant hose from the water thermostat housing.





6. Remove the water thermostat housing bolts, the water thermostat housing, and the water thermostat.

INSTALLATION





1. Follow the removal procedure in reverse order.

NOTE: Make sure all of the gasket surfaces are free of all gasket material. Make sure the tabs on the water thermostat engage properly into slots in thermostat housing.

2. Fill the cooling system with only Ford Premium Engine Coolant E2FZ-19549-AA (in Oregon FSFZ-19549-CC, in Canada, Motorcraft CXC-8-B) or equivalent meeting Ford specification ESE-M97B44-A in a 50/50 mixture with water.
3. Start the engine and check all hoses and connections for leaks. Allow the engine to warm up so that the water thermostat opens.
4. Stop the engine. Top off coolant recovery reservoir as required to maintain minimum cold fill level.