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I have seen rod bolts break (not on a Porsche) mostly on Toyota 4 cylinders and once a 2.3 Pontiac quad 4. Toyota had a run on them at one time.
they tend to break on the shank midway between the head and threads.
once the bolt breaks the bearing usually come out of position, slips under its mate then breaks the opposite rod bolt.
usually catastrophic damage ensues.
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NH
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