bent water pump shaft

[5.0 Fiend]

Originally Posted by grey88gt

Do you have a broken engine mount? Maybe the engine torqued up and the fan grabbed the shroud, and bent the water pump input shaft maybe. Dont see that happening but its a possability.

I think that sounds logical, the rubber mounts do tend to flex a bit when they start to wear. I cant see there being enough torque from just the belt to bend the shaft, but I guess weirder things have happened. Maybe the accessories got to spinning real fast, then the fan clutch kicked in and put the added strain on the shaft, I think either that or the fan hitting the shroud would explain the knock you heard.