Tools You'll Need:
* Socket set (metric) with extensions and a ratchet
* Spark plug socket (usually 5/8" or 13/16", depending on the plug type) with a rubber insert to prevent rounding the plugs.
* Wire brush or spark plug cleaning tool
* New spark plugs (correct type for your engine – check your owner's manual)
* New spark plug wires (the correct set for your engine)
* Penetrating oil (like PB Blaster)
* Jack and jack stands (essential for safety)
* Gloves
* Rags or shop towels
* Possibly a torque wrench (highly recommended for proper tightening of spark plugs)
* Wire loom clamps (if needed, for securing the new wires)
Procedure:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental shorts and damage to the electronic control module (ECM). Support the vehicle securely on jack stands after lifting it with a jack.
2. Access the Engine: The spark plugs are located on top of the engine. You might need to remove the air cleaner housing and possibly some other components for better access. Consult your repair manual for specifics on this.
3. Remove the Spark Plug Wires: Carefully pull each spark plug wire straight off of its spark plug. Note the order of the wires, as they correspond to specific cylinders (usually marked on the wires or the distributor cap). Taking pictures before removal is highly recommended.
4. Remove the Spark Plugs: Use the spark plug socket with the rubber insert to carefully loosen and remove each spark plug. Spray penetrating oil on the plugs a few hours before starting to help loosen stubborn ones. Be gentle to avoid stripping the threads. Clean the spark plug wells with compressed air or a wire brush to remove any debris.
5. Install the New Spark Plugs: Screw the new spark plugs in by hand until they are snug. Then, use the spark plug socket and ratchet to tighten them to the manufacturer's specified torque. Do not overtighten. Use a torque wrench to ensure proper tightening; this is crucial to avoid damaging the plugs or the engine block.
6. Install the New Spark Plug Wires: Carefully place the new spark plug wires onto the spark plugs and firmly push them onto the plugs. Ensure that they are firmly seated. Route the wires neatly and secure them with any wire looms or clips provided in the kit or using original clamps. Refer to your pictures or diagrams to match the wires to their respective plugs.
7. Reassemble: Reinstall any components that you removed to access the engine, such as the air cleaner housing. Reconnect the negative battery terminal.
8. Start the Engine: Start the engine and listen for any unusual sounds or misfires. Check for any leaks around the spark plugs.
Important Considerations:
* Firing Order: The firing order for the 5.0L is crucial; installing the wires incorrectly can lead to engine damage. Consult your repair manual for the correct firing order.
* Torque Specifications: Use a torque wrench to tighten the spark plugs to the manufacturer's recommended torque. Over-tightening can damage the threads.
* Gap: Check the gap of the new spark plugs; if it's not within the manufacturer's specifications, adjust it.
This is a simplified overview. Always refer to a repair manual specific to your 1997 Ford Explorer 5.0L Eddie Bauer. If you are not comfortable performing this task yourself, it's best to take your vehicle to a qualified mechanic. Incorrect installation can lead to engine damage.
