The water pump in your 1993 Cadillac Northstar is used to move coolant from the radiator to the engine. If your water pump becomes damaged, coolant will be prevented from entering the engine, causing your engine to overheat. If your water pump is damaged, you should replace it before taking your vehicle out on the road. You can pick up a replacement water pump from your local auto parts store.
Tools Used: Tools, Wrench, Drain pan, Replacement water pump
Install Water Pump
Turn off the engine of your Cadillac and let both the engine and the radiator cool down completely. Open up the hood and locate the battery. Remove the bolts holding the cables to the battery terminals with a wrench. Lift off both the positive and negative battery cables from their respective terminals. Place the drain pan underneath the radiator. Remove the drain plug on the bottom of the radiator and drain the coolant into the pan. Once the radiator is empty, reattach the drain plug. Remove the bolts attached to the resonance chamber with a wrench. Lift the resonance chamber out of the vehicle. Loosen the bolt on the lower radiator hose clamp. Remove the clamp from the hose. Disconnect the hose from the water pump.
Remove the mounting bolts from the water pump with a wrench. Lift the water pump from the vehicle. Reattach the new water pump to the same position as the old one. Attach the mounting bolts to the water pump to a torque of 18 foot-pounds. Reattach the resonance chamber to the vehicle. Connect the lower radiator hose to the water pump. Fix in place with the hose clamp. Open up the radiator cap and place the coolant into the radiator. Reattach the battery cables to their terminals. Turn on the engine to check that the water pump works correctly.