Re: Borescope results - diagnosing cylinder, exhaust leaks
The valves often don't sit flush with the block, as long as they seal is what matters.
As for what else i can tell from those images.
The bore scope is good quality.
Your engine is in good shape up top.
The only time i've seen valves like that on my engine, was when i ran slightly lean on all cylinders. Didn't harm it but was leaner than it should have been?
Have you used a test light and measured piston position to see if the distributor cam is slightly worn on one cylinder? Because i can't really think of an air leak on the intake causing that on saimesed ports.
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