1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Disconnect the upper radiator hose from the water outlet.
4. Remove the thermostat housing.
5. Remove the thermostat, taking note of its original position in the housing.
6. Thoroughly clean the thermostat housing and cylinder head mating surfaces.
7. Install the thermostat so its flange seats tightly in the machined recess in the thermostat housing. Refer to its position prior to removal.
8. Clean the bolt threads well. Bolts that thread into openings exposed to the coolant may have a build-up of rust and corrosion. Clean threads are necessary to effectively tighten bolts. Install the water outlet to the thermostat housing with a new gasket. Tighten the housing mounting bolts to 16 ft. Lbs. (22 Nm). Do not overtighten, or the thermostat housing and/or water outlet may crack.
9. Connect the lower hose and fill the system with coolant.
10. Connect the negative battery cable. With the radiator cap off, start the engine and allow it to run until the thermostat opens. Add coolant as necessary to fill the radiator completely. Watch the coolant temperature gauge ( if equipped) for signs of overheating.
11. Once the vehicle has cooled, recheck the coolant level in the radiator and the coolant overflow tank.
Monday, November 20th, 2017 AT 3:03 PM