1. Turn off the engine and let it cool. Ensure that the radiator cap is in place and secure to avoid injuries, as a full radiator can expel hot, pressurized coolant when opened.
2. Open your vehicle’s hood.
3. Locate the coolant reservoir.
4. Follow the upper radiator hose attached to the coolant to where it connects to the engine.
5. The thermostat housing usually sits near the end of the upper radiator hose.
Replace the Thermostat:
1. Place a drain pan under the vehicle to collect any coolant that might spill during the process.
2. Remove the radiator cap to relieve the pressure built in the cooling system.
3. Locate the drain bolt on the bottom of the radiator and place a small drain pan under it. Then, loosen the bolt to drain the coolant from the system.
4. With a wrench, loosen and remove the bolts or clamps holding the thermostat housing to the engine. Be prepared for any remaining coolant to escape.
5. Remove the old thermostat from the thermostat housing.
6. Clean the thermostat housing and ensure that the gasket surface is clean and free from any obstruction.
7. Install the new thermostat properly with the correct end facing the hot coolant flow of the engine (a small pin on the thermostat points towards the engine).
8. If the previous thermostat had a gasket attached to it, remove it and clean the surface properly. Then use a silicone gasket maker/sealant or a new gasket on the thermostat when installing the new one. If the thermostat came with its gasket pre-installed, ensure it is seated correctly.
9. Reinstall the thermostat housing and secure the bolts or clamps that you loosened in step 4.
10. Refill the cooling system by slowly pouring the specified amount/mixture of coolant into the reservoir.
11. Replace the radiator cap and reinstall the hood of your vehicle.
Start your car’s engine and let it run for a while.
You may need to run the car until you see the engine reach its normal operating temperature. Look out for any leaks from the area where you replaced the thermostat and ensure the temperature gauge doesn't climb higher than normal.
12. Top up the coolant if needed, and you’re good to go!
