I'm reading various opinions on if you should be concerned with a little valve clatter on startup of a cold engine. I have a 2014 Touareg Sport TDI with 127,000 miles. When it is cold, I hear this clattering noise for about 1-2 seconds. Some people say the timing chain tensioner is the weak link of this motor. Anyone really have the scoop on this. It seems to be a concern on the older 3.0 TDI's for sure.