Hello All,
While changing the air filter today on my 3.6 I noticed a weep of oil from the front of the engine behind a pulley. Some photos attached - any advice on what component could be the source would be great - I am new to Porsche.

I am up to date with IMS / RMS history and the 2005 bias. According to the Porsche shop manual my engine number indicates I have the newer PTFE Crankshaft sealing ring and also (I think) the updated IMS bearing cover.

Thanks