Yikes. Yes, right on.
Something definitely got in there.
As for me, FINALLY I am getting into it. Noted that indeed something got in there obviously wiping away the grease I placed on cylinder walls.
I noted in particular a long vertical mark which can be felt with the finger nail.
The other marks cannot be felt however.
Despite this all cylinders look glazed anyway despite great compression.
This one with damage was low. Jumped up to perfect with a bit of oil.
Despite noting valve leak during head pressure test, I just can’t let this go and intend to hone it with the rest of them, replace rings.
What types of marks/discolorations are these otherwise?
Result of overheating or coolant within cylinder? The object that entered damaging a ring?
It’s been a while and I don’t remember this stuff anymore.
Anyway, I knew better. It was going to be all or nothing.
We hope for the best, plan for the worst.