how to replace the spark plugs in a Honda Accord 10th Generation (2018-2022)

Honda Accord 8th Generation (2008-2012)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

548 words

Problem Statement

Step-by-step guide on how to replace spark plugs in Honda Accord 10th Generation (2018-2022). Learn symptoms, diagnostic steps, and tools required.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool completely before starting work.

Symptoms

•Engine misfires
•Rough idle
•Poor fuel economy
•Difficulty starting the engine
•Check engine light illuminated

Diagnostic Steps

1
Verify the engine model and specifications to ensure correct spark plug type.
2
Inspect the ignition system for any visible damage or wear.
3
Check the current spark plug condition by removing one and inspecting for wear or fouling.
4
Scan for error codes using an OBD-II scanner to confirm misfire or ignition-related issues.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Torque wrench
•Spark plug socket
•Ratchet
•Extension bar

Parts Required

•New spark plugs (OEM recommended)
•Anti-seize compound (optional)
•Dielectric grease (optional)

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Diagnostic Steps

1
Verify the engine model and specifications to ensure correct spark plug type.
2
Inspect the ignition system for any visible damage or wear.
3
Check the current spark plug condition by removing one and inspecting for wear or fouling.
4
Scan for error codes using an OBD-II scanner to confirm misfire or ignition-related issues.

Solution

1. Preparation

Gather Tools and Parts:
- Tools Required: Socket set, torque wrench, spark plug socket, ratchet, extension bar, torque specifications chart.
- Parts Required: New spark plugs (OEM recommended), anti-seize compound (optional), dielectric grease (optional).

2. Access Spark Plugs

Remove Engine Cover:
- Use a socket or ratchet to remove bolts securing the engine cover.
- Carefully lift off the engine cover and set aside.
Disconnect Ignition Coils:
- Locate the ignition coils on top of the engine.
- Disconnect the electrical connectors by pressing the tab and pulling straight out.
- Remove the bolts holding the ignition coils in place using a socket.

3. Remove Old Spark Plugs

Extract Spark Plugs:
- Use the spark plug socket attached to an extension bar to reach the spark plugs.
- Turn counterclockwise to loosen and remove each spark plug.
- Inspect the condition of each plug as it is removed.

4. Install New Spark Plugs

Prepare New Spark Plugs:
- If using anti-seize compound, apply a small amount to the threads of each new spark plug (avoid getting it on the electrode).
Install New Spark Plugs:
- Carefully thread each new spark plug into its respective cylinder head by hand to avoid cross-threading.
- Use the torque wrench to tighten each spark plug to the manufacturer’s specified torque (usually around 13 ft-lbs for Honda engines, but confirm in the service manual).

5. Reassemble Components

Reinstall Ignition Coils:
- Place each ignition coil back in position and secure with bolts.
- Reconnect the electrical connectors until they click into place.
Replace Engine Cover:
- Position the engine cover back onto the engine.
- Secure it with the previously removed bolts.