Yea, the search "engine" here is hopeless. So check out this thread.
http://forums.pelicanparts.com/porsche-911-technical-forum/941604-alternator-bearings-again.html
This is not for the faint of heart. I would not attempt this yourself unless you have some experience with motors/generators. BTW, the parts are available.
You may want to find a shop that specializes in alternator rebuilds.
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Gordon
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'71 911 Coupe 3,0L
outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
Trackrash's Garage :: My Garage