Where is thermostat located ?

Hello,

The thermostat is located on the upper part of the engine.
If you follow your upper radiator hose it will take you right to it.
The thermostat is inside the housing that the radiator house attached to on the engine side.

https://www.2carpros.com/articles/how-an-engine-thermostat-works

Remember to only work on the cooling system when the engine is cool.

The cooling system flush is a straight forward procedure.
Refer to this helpful article:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

I have attached the thermostat replacement procedure (below).

Please let me know of any questions.

Thank you.