Crack inside oil filter case

It looks like only 1 of the cracks lines up with an oil filter cover bolt

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To me, it does look like all the cracks(1-6), or whatever they are, do come out from the cover wall towards the center. At first I thought maybe the top "crack", marked(1) in picture , maybe it is a shadow from a side lighting, but the picture is really high quality (Akashsp was take a great picture! Thanks!!).

At Zoom-In it does looks like a crack and not like a shadow.
In the next month I plan to disassemble my Filter-Cover, if that happens I will downloading to here a photo for reference.

I'm also very curious to know what's going on there, especially because I personally have an oil leak from this area, the picture above: not strong leak, not dripping oil, but very wet.

jkv357 said:

I'm pretty confident it's just normal casting flaws

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You convinced me, then I lost my confidence, I wish that our friend have a normal part with normal casting flaws as in these pictures:

In the coming month I am expected to open the filter cover, as it will happen, of course I will be happy to share photos.

jkv357 said:

If someone is doing an oil/filter change, maybe they could take a close look at their cover and let us know what it looks like. Posting a photo would help.

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From Today.
If I had not been looking for "cracks" there is no way I would have suspected anything.
From a distance of about half a meter the surface looks shiny and smooth. Looking closely, I checked with my eyes, And by touching it. What I was seeing and feeling are not a cracks. The black line is a shadow from my lighting. It's a line that slightly higher up during casting the aluminum.
The photos for your judgment: