Discussion Starter · #1 ·
I posted earlier about a tapping sound and had several replies that it is normal. As luck would have it, it is getting louder. For about the first 20 minutes of driving I get noise (above the normal injector sound) that really sounds just like a valve tap. It follows RPMs and is most pronounced around 1,500. Not rattle or clatter...a clear valve tap sound. Only have 7k miles and now find myself pissed every morning...mostly pissed that I have limited confidence in my dealer. Also, not the DEF pump as I hear that separately. Anyone else having tapping getting louder with the cold temps?