Traded my 2011 Limited Turbo on a 2014 last Sunday. By Friday it was louder than a mid-seventies diesel. Apparently some sort of tensioner came loose. Whatever the part is, it had to be ordered because the car is "too new" to have parts in stock. I assumed the internal engine components would be the same, but apparently something was changed. I'm hoping this isn't a bad omen. Is anyone familiar with engine changes for 2014?