How do you replace the water pump on a 1994 Chevrolet Corsica?

WHAT SIZE ENGINE?WITHOUT KNOWING THE ENGINE IT HARD TO SAY, I DO RECOMMEND YOU LOG ON TO ALLDATA.COM AND REGISTER YOUR VEHICLE, IT'S AN ONLINE TECH MANUAL THAT WILL DEAL ONLY WITH YOUR VEHICLE, UNLIKE CHILTONS OR HAYNES WHICH CAN DEAL WITH A COUPLE OF MODELS AT THE SAME TIME. ALLDATA IS WELL WORTH YOUR TIME AND MONEY.