1. Preparation is Key:
* Safety First: Disconnect the negative battery cable to prevent accidental shorts or shocks.
* Gather Tools: You'll need a spark plug socket (usually a 5/8" or 13/16" depending on your engine, double-check your owner's manual), a ratchet, an extension, and possibly a universal joint or wobble extension to reach the plug at an angle. A magnetic pickup tool will be invaluable for retrieving the plug. Gloves are also recommended.
* Consult a Repair Manual: A Haynes or Chilton manual specific to your '88 Ford Tempo LX will provide diagrams and detailed instructions. This is crucial due to the tight space.
2. Accessing the Spark Plug:
This is the hardest part. Because the alternator is in the way, you'll need to work around it.
* Alternator Removal (Potentially Necessary): This is often the easiest way. You might need to loosen the alternator's mounting bolts to slightly move it out of the way, giving you enough space to get the socket on the spark plug. *However, completely removing the alternator is more involved and requires disconnecting its wiring harness, so only do this if absolutely necessary. Refer to your repair manual for the correct procedure.*
* Working Around the Alternator (More Difficult): If you choose not to remove the alternator, you'll have to work with limited maneuverability. This is where the extensions, universal joint, and wobble extension become crucial. You might need to use a combination of these to reach the plug at the necessary angle. This will require patience and careful maneuvering.
3. Removing the Spark Plug:
* Loosen the Plug: Carefully insert your spark plug socket onto the plug and use the ratchet to loosen it. Turn it counter-clockwise. It might be tight, so apply steady pressure. Don't force it! If it's extremely stubborn, use a penetrating lubricant (like PB Blaster) and let it sit for a while before trying again.
* Remove the Plug: Once it's loosened, continue turning it counter-clockwise until it's free. Use your magnetic pickup tool to immediately grab the plug to prevent it from falling into the engine bay.
4. Replacing the Spark Plug (After Cleaning or Replacing):
* Install the New Plug (if applicable): Screw the new plug in by hand until it's snug. Then use the spark plug socket and ratchet to tighten it to the manufacturer's specified torque. *Do not overtighten!* Your repair manual will specify the correct torque.
* Reconnect the Battery: Reconnect the negative battery cable.
Important Considerations:
* Engine Coolant: Be mindful of engine coolant hoses and other components near the spark plug. Avoid damaging them.
* Photography: Take pictures before you start, this will help with reassembly if you choose to remove the alternator.
If you're not comfortable with this level of car repair, it's best to take your Ford Tempo to a qualified mechanic. Working blindly in tight spaces can lead to damage. Remember to always consult your repair manual for specific details and diagrams relevant to your vehicle.
