Oil loss 4.2 A8 - I get the creep

Hello, everybody.

have a problem with my 4.2 engine in the 1997 A8. When changing the timing belt, the master and I discovered an oil collection below the head sealing. In addition, it always drips at the rear of the right cylinder bench (passenger side) at longer service life (from 1 W.) on the connection from the manifold to the trouser tube. My guess that the simering is leaking the cam wave adjustment cover flap, he couldn't confirm. The thickness does not actually have a noticeable oil consumption. After cleaning the engine, however, the underbody is always oil smeared after a certain time. The technician's guessing camshafts. ==References== One year during the ZR change I could not see anything.

Does any of you have an idea?

Best regards

Marc