Tools You'll Need:
* Spark plug socket: The correct size (usually 5/8" or 13/16") with a rubber insert to prevent rounding the spark plug. A deep well socket is recommended.
* Wrench or ratchet: To turn the spark plug socket. A ratchet with extension will likely be necessary for easier access.
* Spark plug wire pliers (or a similar tool): To carefully remove and reinstall the spark plug wires. Avoid pulling on the wires themselves.
* New spark plugs: Make sure you buy the correct type and heat range specified for your engine (check your owner's manual or a parts store).
* Gloves: To keep your hands clean.
* Penetrating oil (like PB Blaster): Optional, but can help loosen stubborn spark plugs.
* Torque wrench: Highly recommended to prevent over-tightening the new spark plugs, which can damage the threads in the engine. Your owner's manual will specify the proper torque.
* Jack and jack stands (or ramps): To safely lift the car off the ground for better access. Safety First! Never work under a car supported only by a jack.
Procedure:
1. Safety First: Disconnect the negative battery terminal. This prevents accidental shorts and damage to your vehicle's electronics.
2. Access: Locate the spark plugs. They are usually on top of the engine, but accessibility varies depending on the specific V6 engine in your LeBaron (3.0L or other). You may need to remove some components (like the air intake) to gain better access.
3. Remove Spark Plug Wires: Carefully remove each spark plug wire using the spark plug wire pliers. Mark each wire's location with tape or a marker if you're not sure how they connect, to avoid misplacement.
4. Loosen Spark Plugs: Use the spark plug socket and ratchet to carefully loosen each spark plug. Spray penetrating oil if necessary and let it sit for a few minutes. Turn counter-clockwise.
5. Remove Spark Plugs: Once loosened, carefully remove each spark plug by hand. Be cautious not to drop them into the engine cylinder.
6. Clean the area: Use a brush or compressed air to clean the area around the spark plug wells to remove any debris.
7. Install New Spark Plugs: Carefully install the new spark plugs by hand, screwing them in gently until they are snug. Do not force them.
8. Torque Spark Plugs: Use a torque wrench to tighten the new spark plugs to the manufacturer's specified torque. Over-tightening can damage the spark plug threads.
9. Reinstall Spark Plug Wires: Reattach the spark plug wires to the correct spark plugs, ensuring a secure connection.
10. Reassemble: Reinstall any components you removed to access the spark plugs.
11. Reconnect Battery: Reconnect the negative battery terminal.
12. Test: Start the engine and check for any misfires or unusual noises.
Important Considerations:
* Engine Type: The exact procedure might vary depending on the specific V6 engine in your 1990 Chrysler LeBaron. There were a few different variations.
* Repair Manual: A repair manual for your specific vehicle is invaluable. It will provide detailed instructions, diagrams, and torque specifications.
* Safety: Working on your car can be dangerous. Always prioritize safety by using jack stands, disconnecting the battery, and taking proper precautions. If you are not comfortable performing this task yourself, take your car to a qualified mechanic.
This guide is for informational purposes only. Improperly installing spark plugs can damage your engine. If you are unsure about any step, it is best to consult a professional mechanic.
