In this video you can hear what a Porsche 911 engine with bore scoring sounds like when the engine is at full operating temperature from the top side of the engine (with the decklid open). Often cylinder bore scoring in Porsche Boxster, Cayman, or 911 engines is misdiagnosed as bad lifters when in fact the noise is caused by increase piston to cylinder clearance resulting in piston slap.
If you have an audible tick like in this video, the next step is to bore scope your cylinders:
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If your engine has scored cylinder bores, LN Engineering has proven solutions to fix and prevent future bore scoring failures:
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Likewise, if your car doesn't currently have bore scoring, LN Engineering has great information on what steps you should take to reduce the likelihood of having cylinder bore scoring in your Porsche engine:
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