Chasing a very difficult oil leak

[newBgeek]

Awesome! Thanks a lot for your reply. A little googling and I found another thread on this forum for that part. The part number 996-107-047-51. ECS tuning calls it a crankcase vent valve. Pelican parts calls it a "Porsche Connection Piece with Valve for Oil Separator Vent Line". Thankfully a very cheap part.

While it may seem like the leak should come from the vent hole, the leak was actually exactly where my arrow is. That tiny bit of oil is not engine oil. It is the smoke oil starting to bubble. It took about 10 minutes to build enough manifold pressure to start smoking. And about another 5 minutes before I could pinpoint where the smoke was coming from because the source started to bubble.

That's why this was so difficult to find. I could rev the engine in my garage with the covers off for 40 minutes and it would not leak. But after a good run it would start leaking again. The wiring harness just in front of that location was wet with oil. So it looks like it actually sprayed from that location during hard acceleration. I would not have been able to pinpoint the leak without a smoke machine.

Thanks again for your assistance.