Peugeot 206 overheating problem

Hello. For about 1-2 months, my vehicle has a mobility problem, there was no such problem before. It has been going up to 100s for 2 months. this is repeated repeatedly, 10 minutes after starting the car, the movement of the car reaches 90s. it warms up very fast and makes 90 to 100 go and go. When I open the reserve water tank, it becomes a little sparkling water, and what is the probability that my car burned the gasket in the consistency of a little molasses?

thanks

I think the teacher used the vehicle without antifreeze and when it was added later, the rust was dissolved. The seal may be rotten. Therefore, it meets the water with oil. Let's say the gasket does not burn, but it will rot. There is a little expense. because, however, it has to change in a few parts.

So what can I do to make sure that the temperature of the vehicle does not exceed 90 degrees?

the fan turns on, my teacher has no problem, when the hareret reaches 100, the fan turns on again, it drops to 90s, I showed it to the master, the water said that there is no problem in the gasket, there is no problem in the gasket, there is no problem such as swelling in the pipes, if the fan turns on, it will not be a problem if it does not exceed 100s, if it exceeds 100, then said it was a problem

Normal teacher in 206 vehicles with 100 degrees in stationary and congested traffic in gasoline.