I received the water pump today. The Genuine version. You can clearly tell, the impeller is made of metal with a flick of the finger. I will feel much more comfortable with that, than the plastic ones, some of the after market ones are. I'm not sure how the Pierburg one is made.
Still have to get the T-Stat hose and the water pump hose, related to the part numbers on this thread.
I think when done. I'll be happy, I went ahead and replaced all these parts while there. It cost money, yes. Piece of mind for me is worth allot.
I'll be posting the install of these and other parts. (AOS, associated parts) on another thread when everything is in hand and ready to go. It can be found at this link.
http://forums.pelicanparts.com/boxster-cayman-forum/601487-diary-1999-high-mileage-boxster-3.html
A pic or two of the water pump.
Randy