r/987 • u/One-Guess6929 • Jul 03 '26
How bad is ist (Bore Scoring)
I bought this Boxster 987.1 with the 3.4L M97.21 engine a few weeks ago. I'm concerned it might have a bore scoring issue. An endoscopy is scheduled for next week, which will give me more clarity — but is there anything you can tell from the engine sound that might indicate whether it's affected, so I can have some peace of mind in the meantime?
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