Sucking sound, hole in valve cover

[friedymeister]

Hi everyone,

You may have seen some of my earlier posts about weird sounds after a valvetronic servomotor replacement. I've had issues with a "sucking" sound, as well as a "banging" sound. The banging sound was the injector getting loose, which I may or may not have fixed.

Now that the banging sound is gone, I started the car up and it sounded perfect, though a little rough. Reset adaptations and the car seemed good. After it warmed up, it started making the "sucking" sound. It sounds like it's coming from around cylinder 2, and upon further inspection I found a hole in the valve cover. Could that cause the sound? Or is there a separate issue.

I attached a picture of the whole as well as videos of before and after warmup.

Before Warmup: https://drive.google.com/file/d/1dL6...ew?usp=sharing

After Warmup and removal of oil cap:
https://drive.google.com/file/d/15zg...ew?usp=sharing

Picture of Hole:
https://drive.google.com/file/d/1TvK...ew?usp=sharing

[Fishee]

Do you have a stethoscope?
Also check the boost solenoid.
I'm not sure that hole is in the valve cover vs just in a tab... you'd be leaking oil otherwise.