I just bought a second astra

hello everyone!
I just bought an Astra from 1997/98 and for me they have given me a cat for hare, the temperature needle is always between 100 and the red notice part. It also makes a noise when it is in the coarse marches as if it will be revolutionized, and the temperature increases. However, in long marches does not heat up so much.
Can someone tell me something ??? I'm very worried.
Thank you

It is probably the thermostat that is stuck and does not allow the passage of the fluid to cool, the normal operating temperature should be 90 C and the motorcycle operating input temperature is 97-98 ° C before the boiling painting of the refrigerant, if your motorcycler is working Its function, probably the noise you hear as if it were revolutionized can be the motorcycle maker that is getting into minimal or standing the car and when the air is running quickly, help you cool a little and do not listen to that noise, I hope it helps you.

Ahh before enciandas your car make sure of refrigerant levels.

The most common failures are the fan the thermostat and the bulk It can be aggravated if you twist the cylinder head.