The woodruff key should just be for indexing/locating. Parts on the crank snout are held in place by clamping force and a tight slip fit. This is why the crank nut is torqued so much!
I wouldn’t worry about oil getting in there.
If the dampers are hard to get in good shape I would just get one from a company like ATI. They don’t have an OTS version, but its easy enough to adapt the damper they build to a custom hub. This is what the VAC kits, etc. are. There are hub specs available for a lot of other BMW engines so I would be surprised if one already on the books wont work.
I got your PM, just have not had time to respond.
Speaking of ATI you might find this interesting:
I wouldn’t worry about oil getting in there.
If the dampers are hard to get in good shape I would just get one from a company like ATI. They don’t have an OTS version, but its easy enough to adapt the damper they build to a custom hub. This is what the VAC kits, etc. are. There are hub specs available for a lot of other BMW engines so I would be surprised if one already on the books wont work.
I got your PM, just have not had time to respond.
Speaking of ATI you might find this interesting:
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