Quote Originally Posted by 2010AveoLT View Post
this might sound a little brutal, but get a soft faced hammer or Rubber mallet, and tap on the Water Pump Sprocket until the pump drops out of the Volute.
Before my aveo I used to have a "Chevy corsa pick up 1999", it uses the same water pump as aveos. I literaly had to chisel it to pieces bit by bit as it was really stuck in there! luckily no damage to engine block occured! I didnt replace the water pump when I should have.