Uh Oh, Bore Picture and Question

[elgyqc]

For me the question is... is it going to get worse and destroy the engine? That scratch looks to me like it happened as an isolated event, something was in the cylinder, made a scratch and left. If it had been there for more than one stroke it seems to me it would have made multiple marks, in straight lines. As for the other marks... who knows. If someone has taken apart engines, noted minor anomalies, put them back together and run them I would love to know the results.
If it was my engine I would likely put it back together, forget what I saw and keep a close eye on the oil filter for metal shavings. But then I tend to be a shade tree mechanic.

[husker boxster]

Originally Posted by elgyqc

For me the question is... is it going to get worse and destroy the engine? .

"You can't stop him, you can only hope to contain him!" - Dan Patrick from his ESPN days.

Bore scoring starts because the coatings on the cyl and piston skirt have been worn off and you're left with alum on alum, and that doesn't go well. Once it starts, you can't stop it but if caught early you may be able to slow it down (see Jake's video series). But chances are you'll be unaware of the coatings wearing off until it's too late. It doesn't take long for it to get so bad it's drinking oil like a drunken sailor and finally the knocking noise arrives. By then it's too late.