Did you do a leak down test to see where it's going? They look pretty good, I had a couple vertical lines like that at 140k in a few of the cylinders but nothing that catches the fingernail.

I have the $30 Amazon borescope and it works I suppose, but it's just not great, I can't really see anything sometimes. I would like to get one of those nicer articulating cameras if anyone has a good recommendation.

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'05 E53 3.0 6mt
'17 F30 340ix 6mt
'96 E36 328is, in progress