I have been reading this thread of Davids' misfortune, and the others that have chimed in also having issues with "bad pumps". I have been reading this with interest because many of you know I had a pump self destruct during initial startup of new rebuild. As I always am, I WAS CAREFUL during all phases of the build but I never placed the blame on the pump. I just didnt follow instructions to the letter. I interpreted and assumed that I was doing it correctly. Mine was a catastrophic fail immediately. I believe from reading many similar scenarios that the slightest of tension on the shaft during installation could feasibly cause a failure, maybe many miles in the future. I am not saying this is what happened to any of you, but I am not saying it isn't possible. After following the shop manual to the letter I can see where I made the mistake and certainly will not make it again but also see that it is incredibly easy to put a minute amount of strain on the shaft during assembly and not even notice it.