Identify this part/leak, pic inside.

Hey guys, So far the car is going well, I took it apart to identify a leak and address some other issues. First one, there seems to be a leak coming from this hose area that I seem unable to identify. perhaps it is a breather of some sort? It is a black line, that has an open nipple above the head below the ac condenser, and it is behind the big coolant line in the engine. i know thats not an m96 but its the same thing there. Seems to be leak where it attaches to the head just under the ac condenser. Thoughts? I cleaned the block and it seems that is the highest point where the leak can be coming from. In addition to that, is there a good place to increase crankcase ventilation? Any ideas on how to do this? My boost is causing my dipstick to pop out and spray oil inside my bay occassionally.

Is this a 996 forum?????????????????????????????????????????????????????

The engine in the picture is a cayman or boxster engine so the setup is a bit different than for a 911 but the red arrow in the picture is pointing to a vacuum line that comes off the mechanical vacuum pump. On a 997 there is a metal pipe that comes off the pump and goes the brake booster. If you have oil in that line the vacuum pump has failed and is sucking engine oil. There should be no oil in that line whatsoever. Im a bit confused why you posted a picture of a 9x7 cayman or boxster engine in the 996 forum?

thats not my motor, its a pic of a motor with the same part i was looking for. Mine obviously looks similar and I appreciate you guys addressing a potential mistake. I have an M96 but that same piece seems to be coated in oil. Perhaps the leak is coming from further back in the engine? I will take a closer look tonight when I get a chance to work on the car. Thanks for all the information and I will check back in!

Holy ****, did you guys even read the post? It clearly says he knows it's not an M96 in the picture, but it was obviously the only picture he could find that showed the part he was inquiring about, which obviously appears on more than one engine in the Porsche family.

Quotes source post: 11340520

For this one, there are a few possible sources of the issue. 1) Blow-by in the cylinders, which would be bad rings. This is your worst-case scenario 2) More likely, you need to trace the intake piping from the turbo to the intake manifolds and see if you have any vacuum lines that lead to the crankcase that don't have a check valve on them (or a broken check valve). This would give the manifold pressure a route to the crankcase, which could pressurize it, and also result in some performance loss since it would also throw off your A/F ratios a bit.

That part that the arrow in his picture is pointing to does not appear on ANY M96 motor. The mechanical vacuum pump was not used until M97 engines. This is why I'm confused. OP needs to take an actual picture of his engine if he wants any help because there's no possible way his car has that part. I admit I didn't see that his car was supercharged/turbocharged. What he is probably meaning to show is the crankcase overpressure valve. This is installed on m96 engines at the top of the bank 2 cylinder head. I don't have any experience with boosted m96 motors but it doesn't sound out of the question to have a small oil leak from there when running boost if no other mods were made to the crankcase venting system. What supercharger/turbo setup is on the engine? I would imagine the big name systems like from evolution have some way of addressing this.