Thermostat replacement — logbook Toyota Corolla Levin 1997

I puzzled for a long time why the car warms up to operating speed for an unreasonably long time. Like winter is just around the corner, and we stand at 1500 rpm for 10-15 minutes, sometimes longer. And then the clue came. I went to fill the engine coolant. The staff there told me there was a problem. It drives in a big circle, so the speed drops for a long time, and in winter you will be in the car like a penguin.
The fluid was changed at the base of Shell helix on the street. peace. The guys are doing great! Everyone looks carefully and advises. Many thanks to them for this. Everything that concerns liquids, I will do only with them. Plus, there was a Toyota center nearby. Where was the thermostat purchased?

The replacement process was very easy. All that is needed except for the thermostat itself is a capacity of 5 liters, two heads for 10 and 12.
They drained the liquid from the radiator, removed the air filter housing, unscrewed two bolts, changed it in the reverse order. Everything.

I hope the information will be useful to someone.