1. Preparation is Key:
* Consult a Repair Manual: A factory service manual (Haynes or Chilton manuals are also helpful) is essential. It will provide precise torque specifications, diagrams, and crucial steps specific to your Taurus's year. This is far more important than any general advice.
* Gather Tools: You'll need:
* Socket wrench set (including metric sizes, likely 10mm, 13mm, and possibly others)
* Spark plug socket (usually 5/8" or 16mm, deep well is crucial for rear plugs)
* Ratchet and extensions (wobble extensions are HIGHLY recommended for better access)
* Magnetic pick-up tool (to retrieve dropped spark plugs or parts)
* New spark plugs (correct type for your engine)
* Gloves
* Safety glasses
* Jack and jack stands (essential for safety)
* Possibly a swivel socket or universal joint for extra maneuverability.
* Disconnect the Battery: Always disconnect the negative (-) terminal of the battery before starting any work on the ignition system.
2. Accessing the Spark Plugs:
This is the most challenging part. The rear plugs are typically buried deep in the engine bay, behind the intake manifold and other components. Methods vary slightly depending on the year of your Taurus, but the general steps are:
* Raise the Vehicle: Safely jack up the front of your Taurus and secure it on jack stands.
* Remove Air Intake System Components (if necessary): You may need to remove parts of the air intake system to gain better access. Your repair manual will guide you through this.
* Remove Other Obstructions (if necessary): Depending on the year, you might need to remove other components for better access. This could include things like the ignition coils, plastic covers, or other parts. Your repair manual is your guide.
* Use Extensions and Wobble Extensions: This is absolutely crucial. The combination of extensions and a wobble extension will allow you to reach the spark plugs at angles that are otherwise impossible.
3. Removing and Replacing the Spark Plugs:
* Carefully loosen the spark plugs: Use the spark plug socket and ratchet with extensions to slowly and carefully loosen each spark plug. Avoid dropping anything into the engine.
* Remove the old spark plugs: Once loosened, remove them by hand. If they're stubborn, use the ratchet to fully remove them.
* Clean the spark plug wells: Use compressed air or a shop vacuum to clean any debris from the spark plug wells.
* Install the new spark plugs: Install the new spark plugs by hand, tightening them only slightly.
* Tighten the new spark plugs with the socket and torque wrench: This is critical. Over-tightening can damage the spark plugs or the engine block. Use the torque wrench to tighten them to the manufacturer's specified torque (found in your repair manual).
4. Reassembly:
* Reinstall all removed components: Carefully reinstall all components you removed in reverse order.
* Reconnect the battery: Reconnect the battery's negative terminal.
Important Considerations:
* Patience: This is a time-consuming job. Don't rush.
* Cleanliness: Keep the area clean to prevent debris from falling into the engine.
* Safety: Use jack stands, wear safety glasses, and disconnect the battery.
* Photography: Take photos as you disassemble things. This will significantly aid reassembly.
If you are not comfortable performing this repair yourself, it's strongly advised to take your vehicle to a qualified mechanic. Damaged spark plugs or improperly installed plugs can cause significant engine damage. The difficulty of this job makes it a potential candidate for professional help.
