I had the exact same leak about 2000 miles ago and was dripping on my header right below the oil filter not all the time but especially if the car sat for a day or two you could see the moisture on the header. It was either tear the head off and regasket or add a bottle of Bars stop leak. I decided to go with the Bars leak and that stopped the leak. I have no heating issues at all, car runs between 180 - 185 degree on a hot and humid day. I ran my car until the leak stopped then I drained the old antifreeze and refilled with fresh anti. and still no leak...