There is another post like this on Pelican Parts 986 BBS. The guy was going to change his water pump as a maintenance procedure which was working fine. A Porsche Tech said it was not necessary to do so. Pumps can go 10K to over 100K miles. Replace after it only starts to fail and he then described how to monitor which was really simple. The pump usually leak first as they began to fail. Me, why fix something that's not broken.
