<strong>Yahoo Message Number: 82721</strong>I had posted back in September that I was having excessive black exhaust smoke and some loss in power. Real bad smoke above 5,000 feet out in the Rockies and getting all over the back of the coach and my car. <br/>Dropped it off at our local Cummmins shop on the way home and it turned out to be a 6" visible crack in the CAC. They figure that is...