Contents: Removal procedure ↧ Installation procedure ↧
Removal procedure
Caution! To prevent injury, do not remove the expansion tank cap when the engine and radiator are hot, as heat maintains pressure in the system. Hot fluid and steam may escape under high pressure.
1. Drain the coolant. Follow step "Draining and filling the cooling system" in this section.
2. Loosen the upper radiator hose clamp on the thermostat housing.
3. Disconnect the upper radiator hose from the thermostat housing.
4. Remove the mounting bolts holding the thermostat housing to the cylinder head.
5. Remove the thermostat housing from the cylinder head.
6. Remove the sealing ring from the thermostat housing.
7. Remove the thermostat from the thermostat housing by pressing down on the thermostat housing mounting flange and turning it clockwise.
8. Check the valve seat for foreign objects that may prevent the valve from sealing properly.
9. Check the functionality of the thermostat. Follow the step "Checking the Thermostat" in this section.
10. Clean the thermostat housing and cylinder head sealing surfaces.
Installation procedure
1. Install the thermostat on the thermostat housing by pressing the thermostat housing mounting flange down and turning it counterclockwise. Turn the thermostat housing flange until it fits into the thermostat housing recesses.
2. Install a new sealing ring into the recess in the thermostat housing.
3. Install the thermostat housing onto the cylinder head.
4. Secure the thermostat housing to the cylinder head with the mounting screws.
Tighten
Tighten the thermostat housing mounting screws to 15 N·m (11 lb-ft).
5. Connect the upper radiator hose to the thermostat housing.
6. Tighten the upper radiator hose to the thermostat housing with a hose clamp.
7. Fill the engine cooling system. Follow the step "Draining and filling the cooling system" in this section.
