Tools You'll Need:
* New spark plug wires: Make sure you get the correct ones for your engine (3.2L or 2.7L).
* Socket wrench and extensions (likely 5/16" or 3/8" drive): To remove and install the spark plugs (if you're also replacing those). This step is optional if only changing wires.
* Pliers or a wire puller: To help remove old wires.
* Safety glasses: Protect your eyes from flying debris.
* Gloves: Protect your hands from grease and dirt.
* Shop rags or paper towels: To clean up any spills.
* Diagram (from repair manual): This is ESSENTIAL to know the correct firing order and wire routing. Getting this wrong can cause serious engine problems.
Procedure:
1. Disconnect the battery: This is crucial to prevent accidental shorts and shocks. Disconnect the negative (-) terminal first.
2. Locate Spark Plugs and Wires: The spark plugs are located on top of the engine. The wires will be connected to both the spark plugs and the distributor (or coil packs, depending on your Concorde's engine).
3. Mark the Wires (Very Important!): Before disconnecting anything, carefully mark each wire's position. Number them or use masking tape to label them with their corresponding cylinder number. Use the diagram from your repair manual to ensure accurate labeling. This is critical for reinstallation.
4. Remove the Old Wires: Carefully disconnect each wire from both the spark plug and the distributor (or coil pack). Use pliers or a wire puller to gently remove them. Be careful not to damage the spark plug boots or the distributor cap. If the wires are stuck, use a gentle rocking motion to loosen them.
5. Inspect the Spark Plugs (Optional): If you're changing spark plugs as well, now is the time. Carefully remove each spark plug using the appropriate socket and extension. Inspect them for wear and tear and replace if necessary.
6. Install the New Wires: Connect the new wires to the spark plugs, ensuring a good, tight connection. Then, connect the other end of the wires to the distributor cap (or coil pack) according to your markings and the diagram. Make sure the wires are seated correctly.
7. Reconnect the Battery: Reconnect the positive (+) terminal and then the negative (-) terminal.
8. Start the Engine: Start the engine and listen for any unusual sounds. If you hear misfires (rough running, sputtering), you've likely misconnected a wire. Shut down immediately, and double-check your work against the diagram.
9. Check for Leaks: Once the engine is running smoothly, inspect for any leaks around the spark plug boots.
Important Considerations:
* Firing Order: The firing order is the sequence in which the cylinders fire. This is vital information, and it's different for the 2.7L and 3.2L engines. Your repair manual will have this information. Getting this wrong will severely damage your engine.
* Routing: The wires have specific routes to minimize interference and prevent damage. Follow the original routing as closely as possible.
* Spark Plug Gaps: If changing spark plugs, make sure the gap is correct. Again, consult your repair manual.
* Professional Help: If you're uncomfortable performing this task, take your vehicle to a qualified mechanic. Incorrectly installed wires can lead to engine damage.
Remember: This is a general guide. Always consult your vehicle's repair manual for specific instructions and torque specifications. The repair manual will have diagrams specific to your 2000 Chrysler Concorde, showing the exact wire routing and firing order for your engine. This is crucial to avoid damaging your engine.
