DemonBG

Im in the middle of cleaning the intake valves on my 2012 CS and have noticed this “crack?” Between the two valves on the foremost cylinder (driver side). Not sure what this is or if it’s just a parting line form the casting process. Anyone seen something like this before?

the liquid on top of the valves is the CRC valve cleaner in using. It’s not oil.

Any advice would be appreciated.

swmic

Wow, that is wild! Can you get something like a dental pick on it and see if feels like a crack?

DemonBG

Yes. Definitely can feel with a pick and has some depth to it, however I think I’m in the clear. From what I can see in a few other threads this witness mark seems to be on a few other cayennes too:

https://rennlist.com/forums/cayenne-...-cleaning.html


My current theory is that this is a manufacturing mold line which due to tolerances is more pronounced on my engine... it’s a guess. And I hope I’m right.

volcanogts

I’ve walnut blasted tons of 2.0t engines in vw/audi products, and have seen cracks like this a lot. It’s unfortunate, but i don’t believe it’s the end of the world, at least get. Until that crack gets all the way down so that there is a leak into the cyl, I wouldn’t worry about it. Once it gets there, you will know. It will idle rough smoke, similar symptoms to a head gasket, and have a hard time starting because oil could start to leak down onto the valves and onto the piston. I’ve been through that before with the 2.0t engines and at that point the only fix is a new head.