Place a clean collecting container under the drainage valve. Turn the valve counterclockwise with pliers, taking care not to remove the valve. Remove the radiator cap or overflow tank cap to eliminate vacuum lock, and drain all the coolant into the container. Spray the transmission line fittings with a lubricant, remove them with a line wrench, and then cover the lines to prevent dirt entry.
Remove the radiator hoses, then check and replace the cracked hoses. Remove the radiator shroud to facilitate access to the upper mounting bolts, and unscrew and remove the fan.
Unscrew and remove the mounting hardware, and slip the radiator out of the engine. Slip the new radiator into the space left by the old radiator, taking caution not to hit any part of the engine with the fins. Replace the upper mounts, and reattach the fan. Reinstall the transmission lines, and reconnect the radiator hoses.
Filter the old coolant to remove any debris, and add it to the radiator. Alternatively, fill the radiator with new coolant.