Follow upper radiator hose to engine to locate thermostat housing.
With the engine cold, drain the cooling system.
Disconnect the radiator hose from the thermostat housing outlet.
Remove the thermostat housing outlet and remove the thermostat.
Using a putty knife, clean the gasket mounting surfaces.
If the thermostat is equipped with a pin valve, be sure to install the thermostat with the pin facing upward.
Install a new thermostat the gasket, O-ring or sealant (as applicable). Always install the spring end of the thermostat facing the engine.
Tighten the thermostat cover-to-thermostat housing bolts to 9 ft. lbs. (12 Nm).
Connect the radiator hose to the thermostat housing.
Fill, then bleed the cooling system. Check for leaks.