Guessing from the time my car overheated during the water pump failure my head gasket was damaged somewhere along the line. You can clearly smell some coolant burning in the exhaust, and it is not leaking from any hoses. I have worked on plenty of cars and trucks but this is the only Subaru I ever get into, and this is a first for pulling a boxer motor, I heard it was on the easier side to pull out.? any insights?