[dzhuo]

OK. Thx for the info Roger. So just use a plier to pick out the metal shaft still stuck in the pump? Once the metal shaft come out:

1. Should I put everything (metal shaft and blue plastic ring) back onto the impeller and stuck them back to the pump?

OR:

2. Put the metal shaft and blue plastic ring to the pump first and then put the impeller back on?

Also, the pump is still running (with noise) so would it somehow damage the pump? I won't be able to get home until later tonight.