how to replace the spark plugs in my Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Tools Required: Socket set, torque wrench, spark plug socket, extension bar, dielectric grease, shop rag.
• Ensure the engine is cool before starting the replacement.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Remove Ignition Coils

• Locate the ignition coils on top of each spark plug.
• Carefully disconnect the electrical connector from each ignition coil.
• Remove the bolts securing the ignition coils using a socket wrench.
• Gently pull the ignition coils straight out to avoid damage.

3. Remove Old Spark Plugs

• Using a spark plug socket and extension, carefully loosen and remove each spark plug.
• Turn counterclockwise until the spark plug is free.
• Clean any debris around the spark plug hole with a shop rag to prevent contamination.

4. Install New Spark Plugs

• Apply a small amount of dielectric grease to the threads of the new spark plugs.
• Ensure the spark plug gap is set to the manufacturer’s specification (typically 0.044 inches for Honda).
• Carefully thread the new spark plug into the cylinder head by hand to avoid cross-threading.
• Use a torque wrench to tighten the spark plugs to the manufacturer’s specification (usually around 13 lb-ft).

5. Reinstall Ignition Coils

• Position the ignition coils back over each spark plug.
• Secure each ignition coil with its mounting bolt and reconnect the electrical connector.
• Ensure all connections are tight and secure.

6. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and check for smooth operation and any unusual noises.