Hello all, Today I performed the TB, waterpump, tensioner, idler and serpentine belts replacement on my 2005 Passat TDI GLS. I noticed when I was under the car that on each side of the front end of the car there are rubber pipes that are connnected to a steel tube that runs across the bottom of the core support. I found some oil residue around the joints in these boots. I know these boots have to do with the turbo/intercooler system but, where is this oil coming from and should I be alarmed by its presence? There was not a huge amount of oil there but, just enough to attract dirt and road grime. Is this something out of the ordinary? I strongly suggest the dieselgeek TB kit and crank/cam locking tools.