Cayman Engine - What's this part?

[stealthn]

Hi when I opened the engine cover (inside cockpit) to check the belt I noticed a part that was weeping oil. Not sure what it is and thought I would ask the community ( as I didn't see the Cayman engine parts diagram here Wayne?)/

It on the drivers side top on the engine, black tube seen on the right in the pictures.

Thanks in advance,

[harryrcb]

that is your crankcase ventilation system it goes to the AOS on the other side in back of the engine. this is normal for the car

[stealthn]

thanks