Based on the information you provided, here are the detailed steps to replace the coolant thermostat:
- Open the hood and remove the coolant thermostat hose. Note that you need to press the clip when removing it to prevent the coolant from flowing out.
- Attach the new coolant thermostat hose to the radiator, with the clips in place.
- Connect the coolant thermostat hose to the engine cooling system. Put the clips in place and make sure the hose is not twisted or pinched.
- Add an appropriate amount of coolant to the coolant expansion pot. Use the correct container to add coolant if needed.
- Insert the coolant thermostat hose into the coolant expansion pot, making sure the hose is not twisted or pinched.
- Start the engine and check that the coolant temperature is normal. If the temperature is too high, check whether the coolant thermostat is faulty.
Note that replacing a coolant thermostat requires expertise and the correct tools, and it is recommended that you consult a professional auto mechanic.