My 350’s water pump was leaking out the weep hole, so I bought a remanufactured water pump and installed it. It wasn’t until I had everything back together, that I noticed that the pulley scraped on the pump & fan studs only fit backwards. I wasn’t exactly happy, but I managed to MacGyver it back together & even installed the pulley and fan. However, when I filled it with coolant, it was streaming from the weep hole. I therefore, removed the: fan, pulley, power steering pump, alternator, and water pump AGAIN..!!! I returned it to the store for an exchange, however I upgraded to a “new pump”, rather than remanufactured one. After installing the second replacement pump (and the other accessories!), I installed the fan studs (which installed properly, BTW ), but when I went to install the pulley and fan, the water pump fan studs didn’t lineup with the pulley or fan holes. My question is, “ am I just seriously unlucky or is there a logical explanation somebody might be able to give?