Quote:
Originally Posted by zkv476
You're not likely to have scored anything at least, the seal is soft and that crank pulley spacer piece is hardened steel.
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Ah, not necessarily, unfortunately. Scoring cannot be eliminated from the possible causes.
I work with heavy machine parts (rollers) every day, of which all run on bearings in housings containing very similar, if not the same seals (speaking of the material of course), which are used here. Here's a picture of what the seals can do to a hardened steel shaft:
The red arrow is scoring from the bearing, and the yellow arrow is scoring from the seal.
When the bearing starts to run out of round due to the damaged shaft, the seal also runs out of round and contacts the hub with slightly more pressure, and that's what you get. Believe it or not.
In this case however, if the seal was improperly installed and rubbing the shaft a bit more, this *could* happen. Not saying it did, but it could.