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Originally Posted by csu15919
here's pics of the bent spark plug
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I hate it when plugs look like that! I have not been inside a 986 motor but normally a rogue piston will slam into the head before ever making contact with the plug so something else is banging around in there... chunks o sleeve, chunks o valve, chunks o rings etc.
The video scope is a good idea. Sometimes you can rent one and run it in the spark plug hole before dropping the motor. At least then you will know what you are up against. I had a broken valve spring in a 6cyl Volvo marine engine once with similar symptoms. I heard the racket and shut her down right away. I pulled the head, replaced the thrashed valve, spring and guides, cleaned up the divots in the piston and logged another 700 hrs on that motor. I was very lucky. Lets hope you have such an easy fix.