Tools You'll Need:
* New lower radiator hose: Make sure you get the correct one for your 1999 Ford Expedition. The part number can be found online or at your local auto parts store. Take the old hose with you for a perfect match.
* Socket wrench set: You'll likely need various sizes, including possibly a 10mm, 13mm, and possibly larger depending on your specific clamp type.
* Flathead screwdriver or pliers: To help loosen or remove hose clamps. Some newer vehicles use worm-gear clamps that require a special tool, but older models frequently have simpler clamps.
* Basin or container: To catch the coolant that will drain from the radiator.
* Jack and jack stands (highly recommended): To safely lift the vehicle and provide stable working space. Never work under a vehicle supported only by a jack.
* Wheel chocks: To prevent the vehicle from rolling.
* Gloves: To protect your hands.
* Rags or shop towels: To clean up spills.
* Funnel: To refill the radiator.
* New coolant (50/50 mix of coolant and distilled water): Check your owner's manual for the recommended type.
Procedure:
1. Safety First: Park the Expedition on a level surface, engage the parking brake, and chock the wheels. Allow the engine to cool completely.
2. Prepare the Vehicle: Raise the front of the Expedition using a jack and secure it on jack stands. Locate the lower radiator hose. It connects the radiator to the engine.
3. Drain Some Coolant: There's usually a drain valve at the bottom of the radiator. Open this valve carefully (with a container underneath!) to drain some of the coolant. This will reduce the amount that spills out when you disconnect the hose.
4. Remove the Hose Clamps: Using your flathead screwdriver or pliers, carefully loosen and remove the hose clamps that secure the lower radiator hose to the radiator and the engine. You may need to carefully work the screwdriver under the clamp to loosen it.
5. Disconnect the Hose: Once the clamps are loosened, carefully wiggle the hose free from the radiator and engine. Some coolant will likely spill, so be prepared.
6. Install the New Hose: Carefully slide the new lower radiator hose onto the radiator and engine connections. Make sure it's seated properly.
7. Secure the Hose Clamps: Reinstall the hose clamps, making sure they are tightened securely. Use the appropriate tools to ensure a leak-proof seal. Don't overtighten them as you can damage the hose.
8. Lower the Vehicle: Carefully lower the Expedition from the jack stands.
9. Refill the Radiator: Add the 50/50 mixture of coolant and distilled water to the radiator until it's full. Refer to your owner's manual for the correct capacity.
10. Check for Leaks: Start the engine and let it run for a few minutes. Carefully inspect the connections for any leaks. Check under the vehicle as well.
11. Top Off Coolant (if needed): If the coolant level drops, add more as needed. Allow the engine to cool completely before adding more coolant.
12. Dispose of Used Coolant Properly: Take the used coolant to an auto parts store or recycling center for proper disposal. Coolant is hazardous waste.
Important Considerations:
* Type of Clamps: If you encounter worm-gear clamps, you'll need a special clamp tool for proper tightening. These tools are available at auto parts stores.
* Hose Routing: Pay attention to how the old hose was routed. The new hose should follow the same path.
* If Unsure: If you're not comfortable performing this repair yourself, take your Ford Expedition to a qualified mechanic.
This guide provides a general overview. Specific steps may vary slightly depending on your vehicle's configuration. Always consult your owner's manual or a repair manual for your specific 1999 Ford Expedition model for detailed instructions and diagrams.
