Hi guys, new to the site. I recently bought a used 2000 kdx 220 and it was seaping a little bit of water out the weep hole on the water pump. I took the impeller off and the seal came right out. (just ordered a new one) I then put it back in and after putting coolant back in it was leaking out the weep hole like crazy. Why is this? are those seals a one time deal? Im just nervous that when i put the new one in its going to leak. Thanks