In Reply to: Because of the advice on this board... posted by Kenny on December 12, 2000 at 13:10:06:
The old one had a stamped / welded thin metal impeller (like you'd get at Pep Boys for your Toyota) , and the new OEM one had a thicker cast metal impeller. I believe the one I removed might have been the original (at 94K miles???) - but I was surprised to see how cheap it looked inside - plus the bearings were toast! (It squealed like Mariah Carey!)
New water pump on - so far no leaks or problems - we'll see.
Perhaps the O rings on the horizontal pipes weren't seated properly when yours was installed. (They come pre-installed on the OE units at least and did require careful alignment upon reinstall of the pump).
Paul (learning all about others' E34s these days)
Maximillian Importing Co