The engine in a 1993 Chevrolet Silverado has a water pump mounted on the front of the engine. This pump is used as a coolant delivery system for the motor, as it circulates the coolant through the block and to the radiator. When the water pump fails, the engine risks overheating. If you notice your Silverado overheating, replace the water pump to ensure everything is working correctly.
Allow the Silverado to cool for several hours. Open the hood, and remove the radiator cap. Crawl under the front of the truck, and put the drain pan under the drain at the bottom of the radiator. Open the drain, and empty the radiator.
Locate the belt tensioner at the top corner of the engine. Turn the tensioner counter-clockwise with the 3/8-inch breaker bar and a socket, then pull the belt off the water pump.
Remove the hose on the water pump with the flat-head screwdriver. Unbolt the water pump from the engine block with the 3/8-inch ratchet, extension and sockets. Pull the water pump off the engine, then scrape the water pump mounting surface on the engine using the gasket scraper. Unbolt the water pump pulley from the water pump with the 3/8-inch ratchet and socket.
Install the pulley onto the replacement water pump with the 3/8-inch ratchet and socket. Install the replacement water pump gasket onto the replacement water pump, then install the replacement water pump onto the engine with the 3/8-inch ratchet and socket. Torque down the water pump bolts to 30 foot-pounds using the torque wrench and a socket.
Reinstall the water pump hose to the water pump with the flat-head screwdriver. Reinstall the belt on the water pump with the 3/8-inch breaker bar.
Fill the radiator with the 50-50 pre-diluted coolant. Start the truck, then let it run with the heater controls on high and at the hottest setting until the engine reaches normal operating temperature. Let the engine cool again, and fill the radiator with the 50-50 pre-diluted coolant. Reinstall the radiator cap.
