[mikefocke]

Do re-manufactured engines done by Porsche sometimes have different IMS assemblies than the submitted for repair engines would have had? Yes.

How can you tell? While the date of re-manufacture will give a clue if you have that, the only sure way to tell is to separate the engine and transmission and look at the external housing that covers the IMS bearing and shaft (flange cover). The design of the housing will tell which it is. Post a picture here and experts who have seen hundreds will tell you.

Is it possible that a Porsche dealer re-manufactured the engine and not the Porsche factory and thus the engine serial number would not bear the re-manufactured mark? Until recently, the Porsche policy was dealers didn't get inside the engines. Replaced engines went back to the Porsche factory for examination and re-manufacture. Recently some Porsche dealers have had their techs trained and have taken on IMS replacements or even complete engine rebuilds. More than likely the rebuild was done by an ex-factory-trained mechanic working outside the dealership network as an independent..