Location of engine cooling system components
1. Radiator; 2. Air conditioning system refrigerator; 3. Cooling fans; 4. Water pump; 5. Thermostat; 6. Expansion tank
Thermostat
1. Flange; 2. Piston; 3. Valve; 4. Main spring; 5. Additional spring; 6. Foundation; 7. Valve; 8. Valve seat
(View the original source on the website: «Toyotaman.ru»)
Hydrometer

To check the condition of the coolant, you can use a hydrometer.
