Just read the above reply. For clarification, 911 crankshafts are not rough or porous at all. It should be smooth on all surfaces. They are not cast but rather forged. If any of the surfaces are rough or porous it is either from corrosion/rust/acidity damage or from foreign material build-up. I hope for Adams sake it is the latter.
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Tyson Schmidt
72 911 Cabriolet
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