Before You Begin:
* Safety First: Disconnect the negative battery cable to prevent accidental shorts.
* Gather Tools: You'll need a spark plug socket (usually 5/8" or 13mm), a ratchet, extension(s), a swivel, and possibly a magnetic pickup tool to retrieve the old plugs. A torque wrench is highly recommended to tighten the new plugs to the correct specification (check your owner's manual). Gloves are also a good idea.
* Consult a Repair Manual: A Haynes or Chilton repair manual specific to your 2001 Ford Explorer Sport is invaluable. It will provide detailed diagrams and instructions tailored to your vehicle.
General Steps (This is not a substitute for a repair manual):
1. Access: This is the hardest part. You'll need to work around the intake manifold and other components. You may need to remove some parts for better access, such as the air intake system, possibly parts of the upper intake, and potentially some plastic shrouds. Refer to your repair manual for the specific components to remove.
2. Locate the Spark Plugs: Once you have sufficient access, locate the two rear spark plugs on the passenger side. They're likely nestled deep within the engine compartment.
3. Remove the Spark Plug Wires: Carefully disconnect the spark plug wires from the plugs. Make sure you note which wire goes to which plug, or take pictures for reference.
4. Remove the Spark Plugs: Using your spark plug socket, ratchet, and extensions, carefully remove the spark plugs. The swivel will help navigate tight spaces. A magnetic pickup tool will be helpful for retrieving the plugs.
5. Inspect the Old Plugs: Examine the old spark plugs for wear and tear. This can provide clues about the engine's condition.
6. Install New Spark Plugs: Carefully install the new spark plugs, ensuring they are seated correctly. Do not overtighten. Use a torque wrench to tighten them to the manufacturer's specified torque (consult your repair manual).
7. Reconnect Spark Plug Wires: Carefully reconnect the spark plug wires to the new spark plugs, ensuring a secure connection for each one.
8. Reassemble: Carefully reinstall any components you removed to gain access to the spark plugs.
9. Reconnect Battery Cable: Reconnect the negative battery cable.
10. Start the Engine: Start the engine and listen for any unusual noises or misfires.
Important Considerations:
* Engine Type: The access will vary depending on whether you have a 4.0L SOHC or 4.0L OHV engine. Your repair manual will provide specific instructions based on your engine type.
* Patience: This is a challenging job, and it's crucial to be patient and methodical. Rushing could lead to damage.
* Professional Help: If you're uncomfortable working on your vehicle yourself, consider taking it to a qualified mechanic. The cost of professional labor might be less than the cost of damaging something in the engine compartment.
Remember, this is a general outline. Always consult your repair manual for specific instructions and torque specifications for your 2001 Ford Explorer Sport. Improperly tightened spark plugs can lead to damage to the engine.
