I am having a problem with my 323i with 170k.
One week ago it overheated badly. Someone else was driving
I noticed the expansion tank was punctured and coolant leaked.
So I got a new tank. After that I filled with coolant. I opened the bleeding screw while filling to make sure air goes out. Then when I start the car I see some issues:
- immediately a lot of pressure builds in the hoses.
- coolant does not circulate through the hoses
so I went to get a new thermostat, put it in, redid bleeding.
same issues: as soon as I start the car there will be a lot of pressure in the cooling system.
shall I go ahead and assume head gasket is gone?