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Old 03-10-2010, 01:44 AM   #77 (permalink)
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Yeah, but none of the "causes" lines up with anything that's happened (since I've had it) with my engine.

They don't look too bad, aside from the obvious. The burnt ceramic, since I just looked at it again, isn't actually burnt. It's combustion deposit that I can scrape off with my thumbnail. It appears to be a brownish color around the outer edges of the deposit.
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