Thinking about purchasing a new car? Use our new Car Loan Calculator to estimate your monthly car payment!

How to Replace the Water Pump in a Ford Explorer

by Contributor

The water pump is a very important part of the Ford Explorer's cooling system in your Ford Explorer. In fact, it is nothing less than the heart of the cooling system, circulating the coolant. A faulty water pump can cause some serious damage to the engine of your vehicle. Make sure to change out a bad water pump.

4.0L Explorer Engines

Place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Remove the fan shroud, the cooling fan, the accessory drive belt and the water pump pulley with the bolts.

Disconnect the coolant bypass hose and the lower radiator hose.

Loosen and remove the bolts attaching the water pump and remove the pump from the engine.

Clean all the mounting surfaces to the water pump.

Install the new pump, tightening the bolts to 89 inch pounds (20 to 28 Nm).

Reattach and install all components in reverse order from removal. Tighten the water pump pulley bolts to 18 foot pounds (25 Nm).

Refill the cooling system. Start the car and check for leaks when the engine reaches normal operating temperature.

5.0L Explorer Engines

Disconnect the negative battery cable and place a drain pan underneath the radiator. When the engine is cool, drain the cooling system from the radiator into the pan.

Remove the fan shroud, the cooling fan, the accessory drive belt and the water pump pulley with the bolts.

Take out the accessory drive belt. Disconnect and remove the heater hose and the bypass hose from the pump.

Remove the brackets to the engine control sensor wiring. Move the harness out of the way.

Loosen and remove the bolts to the water pump pulley and the water pump and remove the pulley.

Pull the water pump out and away from the front cover. Once the water pump is out of the way, disconnect the lower radiator hose. Then, take the water pump out of the engine.

Clean the front cover to the water pump and all the mounting surfaces. Put some adhesive gasket sealer on both sides of a brand new gasket and put it on the pump.

Reattach the lower radiator hose to the pump and reattach the pump, tightening the bolts to 15 to 21 foot pounds (20 to 28 Nm).

Reattach and reinstall all components in reverse order to their removal. Reattach the negative battery cable and refill the cooling system. Start the car and check for leaks when the engine reaches normal operating temperature.

Tip

  • Loud noises coming from the cooling system in your Ford Explorer could be a sign that your water pump needs replacing. A leak in the coolant may also be an indicator.

Warnings

  • Never attempt to drain the radiator when the engine in your Ford Explorer is hot. The steam and the hot coolant within the radiator can cause serious burns.
  • Be careful when you are cleaning the water pump block mating surfaces. If you scrape too hard, you could cause damage to the aluminum, which could cause leaks.
  • Never leave antifreeze open or in puddles. Cats and dogs are attracted to the ethylene glycol in the antifreeze and if they drink it, it can be fatal.

About the Author

This article was written by a professional writer, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more, see our about us page: link below.

More Articles