Here's a general overview of the process. Specific steps may vary slightly depending on your engine (4.0L Cologne V6 is the most common). Always consult a repair manual specific to your vehicle's year and engine for detailed instructions and torque specifications. A Haynes or Chilton manual is a good investment.
Tools you'll likely need:
* Repair manual: Absolutely essential!
* Socket set (metric): Various sizes, including deep sockets.
* Wrench set (metric): Open-end and combination wrenches.
* Ratchet and extensions: To reach hard-to-access bolts.
* Torque wrench: Crucial for proper tightening of bolts.
* Drain pan: For coolant.
* New water pump: Ensure you get the correct one for your vehicle.
* New gasket(s): For the water pump and any other components you disturb.
* New coolant: The correct type and amount for your vehicle.
* Jack and jack stands: Essential for safe working conditions.
* Wheel chocks: For added safety.
* Screwdrivers (Phillips and flathead): Possibly needed for various components.
* Pliers: Various types may be helpful.
* Gloves and safety glasses: Protect yourself from coolant and other hazards.
General Steps (Consult your repair manual for precise details):
1. Safety First: Disconnect the negative battery terminal. Raise the vehicle securely using a jack and jack stands. Place wheel chocks on the remaining wheels.
2. Drain the Cooling System: Locate the drain plug on the radiator and engine block (if applicable). Open them carefully and let the coolant drain completely into your drain pan.
3. Remove Accessory Components: This is where it gets engine-specific. You may need to remove the serpentine belt, fan, fan shroud, and possibly other components to access the water pump. Take photos as you go to help with reassembly.
4. Remove the Water Pump: This typically involves removing several bolts securing the water pump to the engine block. Be careful not to damage the engine block surface. The pump may be stubborn; use penetrating oil if needed.
5. Replace the Gasket: Remove the old gasket from both the engine block and the water pump. Clean both surfaces thoroughly to ensure a good seal with the new gasket.
6. Install the New Water Pump: Carefully install the new water pump, ensuring the gasket is properly seated. Tighten the bolts to the manufacturer's specified torque settings using your torque wrench.
7. Reinstall Components: Reinstall the components you removed earlier in reverse order, ensuring everything is properly connected and secured.
8. Refill the Cooling System: Fill the radiator and overflow reservoir with the correct type and amount of coolant.
9. Bleed the Cooling System: Run the engine for a few minutes to allow the air to escape from the cooling system. Check for leaks. Add more coolant as needed.
10. Test for Leaks: Let the engine run for a while and inspect for leaks. Top off the coolant if necessary.
Important Considerations:
* Coolant is corrosive: Wear appropriate safety gear.
* Engine components can be hot: Allow the engine to cool completely before starting work.
* Torque specifications are crucial: Using the incorrect torque can damage the engine or water pump.
* This is a complex job: If you are unsure about any step, consult a repair manual or seek professional help.
This is a simplified overview. The actual process is much more involved and requires careful attention to detail. Always refer to a repair manual specific to your 1992 Ford Explorer Sport for detailed instructions and diagrams. Failing to do so could result in damage to your vehicle or personal injury.
