The Ford Explorer was introduced in 1991. The 1994 model of the Explorer was equipped with a 4.0-liter V-6 engine capable of producing up to 160 horsepower and 220 foot-pounds of torque, and it came with the option of two-wheel or four-wheel drive. The water pump on the 1994 Explorer is located on the front of the engine. Changing the water pump hose is usually done when the hose has ruptured or has developed a leak. A replacement water pump or heater hose can be purchased at an auto supply store already cut-to-fit and bent-to-fit.
Instructions
- 1
Raise the hood of the 1994 Explorer and set the hood prop to hold the hood in position for the duration of this project. Place a drain pan underneath the engine, directly below the water pump.
2Remove the water pump hose from the Explorer, using a 3/8-inch drive ratchet to loosen the hose clamp. Pull the hose off of the water pump by hand or use a pair of pliers if you need more leverage. Aim the end of the water pump hose downward into the drain pan, so as not to spill coolant on the ground.
3Loosen the hose clamp from the other end at the water valve, using a 3/8-inch drive ratchet and socket. Remove the old water pump hose completely from the engine and place it in the drain pan beneath the Explorer.
4Spray a clean rag or towel with aerosol engine parts cleaner. Continue spraying until the rag is somewhat saturated. Wipe the protruding nipples on the water pump and the water outlet valve. This will remove corrosion between cooling hoses and metal parts, caused by evaporation and condensation in the cooling system.
5Install a new hose clamp onto the end of the water pump hose that attaches to the water outlet valve. Install the new water pump hose onto the valve and tighten the hose clamp between 15 and 20 foot-pounds of torque, using a 3/8-inch drive ratchet and socket with a 4-inch extension.
6Install a new hose clamp on the water pump end of the new hose. Push the new hose onto the water pump by hand and tighten the hose clamp between 15 and 20 foot-pounds of torque with a 3/8-inch drive ratchet and socket.
7Remove the radiator pressure cap from the Explorer. Start the Explorer engine and let the engine run for no less than 20 minutes. Turn the fan-speed selector to full speed and select defrost on the heater control panel. This will allow the engine to heat up quicker. This procedure will bleed the air pockets out of the cooling system. Air pockets are created any time a cooling system is opened and parts are replaced. Running the engine while it is hot will force air pockets out of the cooling system.
8Shut off the engine off after 20 minutes, if you observe no more air bubbles being expelled from the radiator. Top off the radiator with a gallon of 50/50 premixed universal coolant. Put the radiator cap back on the radiator and tighten the radiator cap securely. The radiator cap has two locking positions -- the second position is the fully locked position.
