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The "rough edge" on the bearing inner cover in picture #1 is interesting - looks like the steel has been acid etched.
Was this section of the cover positioned at the bottom - I seem to recall the the lower edge of the IMS is immersed in oil when the engine is stationary, so if the bearing was sitting in old, acidic oil for long periods, etching could occur.
It would be interesting to see if the bearing races were in a similar condition, but that would mean cutting it open to inspect .....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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