Hi guys, we picked up the new car and after test driving for a bit I have noticed that the way its losing coolant is through the overflow.
I was told when i bought it that he was told he would need a new motor because the head gasket or heads were gone.

Now the car drives fine, I have checked the oil and there is no white coolant mix goo in it, and it doesnt have that "rainbow" look that oil gets with a slight mix of coolant.

Is it possible that it could be the thermostat?

Also have driven the car ALOT for 2 days and it still isnt losing enough coolant to overheat, I've topped it up now and it took a bit but not heaps.

BTW its a 95 wrx ej20t