I’m in Tucson, AZ for a few days while my truck is getting a new camshaft installed. I started hearing a noise from the engine that sorta sounded like something thumping, or knocking in a weird way. As I continued heading to LA from Florida, it became more apparent that I had a problem that needed to get checked. So on Monday morning I stopped at the Volvo truck shop in Tucson, AZ. They diagnosed a cam had worn down on #2 cylinder’s exhaust rocker. The repair estimate is $5540, and that is a big set back. Fortunately I did not have to get the load I’m under repowered, and the load I had booked back to Nashville is still mine to pick up.