However, if you're determined to attempt the repair yourself, here's a breakdown of the process:
1. Identify the Leak:
* Locate the Leak: Carefully inspect all air lines running from the air compressor to the air struts (shock absorbers) and air springs. Look for visible cracks, holes, or areas where air is escaping. You might hear a hissing sound to help pinpoint the leak. Use soapy water (dish soap and water mixed) to help visualize escaping air; bubbles will form at the leak point.
* Type of Hose: Determine the type of hose. Is it rubber, plastic, or a reinforced type? This will dictate the repair method.
2. Gather Supplies:
* Replacement Hose: If the hose is significantly damaged, replacement is the best option. You'll need to find the correct hose for your year and model Expedition. A Ford dealership or reputable auto parts store can help with this. Be sure to get the correct length and diameter.
* Hose Clamps: You'll need new hose clamps to secure the new hose or to tighten the existing ones (if repairing a minor leak). Choose clamps appropriate for the hose diameter.
* Air Suspension Compressor (if necessary): For access, disconnecting and reconnecting air lines may necessitate running the air suspension compressor momentarily.
* Jack and Jack Stands: Safely raise the vehicle and support it on jack stands before working underneath.
* Wrench Set: To remove and install hose clamps.
* Soapy Water: For leak detection (as mentioned above).
* Gloves: Protect your hands.
* Safety Glasses: Protect your eyes.
3. Repair or Replace the Hose:
* Minor Leaks (Small Cracks): If the leak is very small, you *might* be able to temporarily seal it with a rubber hose repair kit designed for pneumatic systems. However, this is a temporary fix, and a proper replacement is recommended.
* Major Leaks (Holes, Tears): Replacing the damaged section of hose is the best solution. This usually involves:
* Disconnecting the Hose: Carefully disconnect the hose from the fittings. Be mindful of any pressure remaining in the system.
* Cutting Out Damaged Section: If you are splicing in a new section, cut out the damaged portion, ensuring clean, square cuts.
* Connecting New Hose Section (if applicable): Insert the new hose section and secure it tightly using new hose clamps. Ensure there are no kinks or bends in the hose.
* Reconnecting the Hose: Carefully reconnect the hose to the fittings.
* Complete Hose Replacement: If the entire hose is damaged, replace it with a new one of the correct length and diameter.
4. Test for Leaks:
After making the repair, run the air suspension compressor (if necessary) and carefully inspect all connections for leaks. Use soapy water again to detect any escaping air.
Important Considerations:
* Pressure: Air suspension systems operate under significant pressure. Be extremely cautious when working with them to avoid injury.
* Safety: Always use jack stands to support the vehicle. Never work under a vehicle supported only by a jack.
* Air Suspension System Complexity: This system is intricate. Improper repair can lead to more extensive and costly damage, including complete system failure.
Again, unless you have experience working on air suspension systems, it's strongly recommended to have a qualified mechanic perform this repair. The cost of a professional repair might be less than the potential costs of further damage from an unsuccessful DIY attempt.
