Also, I put some stop leak garbage(SLG)intoexp.tank to drag myself to my home sweet home while I was on the way. I used almost 5 liters of destiled water to keep proper level of coolant. When I saw whats going on I bought that SLG (it says K2 and made in USA) and put it all into the tank. I ask now will bleeding the system completely and putting new coolant fix the things a little? Should I use also cooling system cleaner?

 

go ahead and replace the thermostat

 

It is probably head gasked cracked. I changed thermoswitch.
Does anyone know what is the normal working engine temperature for Audi 100 turbodiesel 2.0L '87?
If it goes to about 110 degrees centigrade is that too much?