The longer I own any vehicle (car or motorcycle) and the more in tune I become with it, the more little knocks and noises I hear. In the absence of any additional indicators (performance, leaks...) I would just monitor it.
I have seen a few threads about new TDIs leaking at the injector: coming loose, cracks... I would pop the noise shield and take a look for leaks.
Here is the link to the leaking injectors: http://www.myturbodiesel.com/forum/f19/fuel-leak-5802/
I know your complaint/observation is a noise, but a leaking injector would not operate as designed until the air is purged from the system.
As for the possibility of it being the classic diesel ping, a shot of cetane treatment/boost in the tank would change the attributes of the noise if it is just a cold diesel noise you are hearing.
I have seen a few threads about new TDIs leaking at the injector: coming loose, cracks... I would pop the noise shield and take a look for leaks.
Here is the link to the leaking injectors: http://www.myturbodiesel.com/forum/f19/fuel-leak-5802/
I know your complaint/observation is a noise, but a leaking injector would not operate as designed until the air is purged from the system.
As for the possibility of it being the classic diesel ping, a shot of cetane treatment/boost in the tank would change the attributes of the noise if it is just a cold diesel noise you are hearing.
