cylinder damage - pic inside - your opinion

Hey out there,

I just disassembled my engine and saw a pretty unusual damage which I am not 100% sure what the reason is.

As you can see in the pic, I have a blank area where the hone grind ( I do not know the englisch word :-) ) is gone.

This I have on both sides of the cylinder, and also on each other cylinder.

I have JE pistons installed with a clearance of 0.12mm

2 liter Engine, turbo charged, GTX3076 runing 2 bar of boost

What is your opinion to this?

Is it possible that's where the piston skirt was riding? Perhaps a flat spot on the piston ring? Just my thoughts at first glance, have you had it hot tanked yet to see if it's just dirty?

It's not uncommon to see a polished area on the cylinder wall where the hone pattern appears to be worn away. This isn't something to be worried about. A good guide as to whether you have an issue is if there is scoring or scratches in the cylinder wall that you can feel with your fingernail.