I have an oil leak that is creating great grief. I have a 2014 535i N55 65k miles. I have an oil leak that appears to be coming from the head gasket just below the first cylinder. At first the oil filter housing gasket was suspect so I replaced gasket this did not fix so next I replaced entire housing with the included BMW gaskets. This did not fix so upon closer examination it was realized that the leak was coming from a 1/4" area of the head gasket just below the first intake runner. is this a blown head gasket or an oil leak migrating and escaping there?