VITZ 1SZ Motor Heating

It is rare if you say that everything is fine would not have to fail, take out the thermostat and try to see what happens, if it does not try the direct fans, now as far as the clock marks when you say that it heats a lot?

The sensor is electric, does not mark the temperature degrees, directly turns on and flash and that is when it is already boiling.
Yesterday because of the pressure, he threw the refrigerant deposit lid again. Luckily, three days before, the lid will tie the lid with a high voltage rope to the heat and it was not lost.
The truth is that this problem gives me a lot of can and now the spring is starting and temperatures rise more and more.
Tomorrow I will take another mechanic, I hope to solution and then comment.
A hug and thanks for your orientations.

Nor does it lose water due to the escape or throw vapor through the escape.

A hug

The only solution would be to change the radiator plug if steam flee

The liquid leak is very small may not see it easily or even evaporate. Try to leave the car in an area where you can see if it has dripped and if you observe antifreeze drops on the ground you already know the area where you should look.
On the other hand, in one of your answers you say: ... the water is not mixed with the oil, the electrventilator works more, that is, when the engine is heated, it starts working longer.
Well, if the electrventilator works for others (it takes longer than usual to cool), as another partner already told you, try to remove the thermostat, close the box without it, fill the circuit again and make it work. If the thermostat does not open at all because it has been broken, not enough flow is not enough and it takes more than the account to cool.
Be careful, when emptying the liquid and stuffed do not bleed the circuit can be air in the cylinder head and burn the joint or cognize the cylinder head. Then the gases would pass to the circuit and throw the liquid through the plug due to excess pressure or release or burst some sleeve.
I hope it is only the thermostat and you have not taken air in any change because if you have annoyed the Board or the butt and the breakdown is complicated and the price of the repair more. Luck.