how to replace spark plugs on 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

501 words

Problem Statement

Learn how to replace spark plugs on Honda Accord 10th Generation (2018-2022). Step-by-step guide with 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 the ignition system to avoid shock or damage.

Symptoms

•Check engine light illuminated
•Rough idle
•Difficulty starting the engine
•Decreased acceleration
•Poor fuel economy

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any misfire codes.
2
Visually inspect spark plugs for wear, fouling, or damage.
3
Check ignition coil operation if misfire codes are present.

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

•OBD-II scanner
•Socket set (including spark plug socket)
•Torque wrench
•Ratchet
•Anti-seize lubricant (if recommended)

Parts Required

•Replacement spark plugs (OEM or equivalent)

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Solution

1. Preparation

Gather Tools and Parts: Ensure you have the necessary tools and replacement spark plugs.
Safety Precautions: Disconnect the negative battery terminal to prevent electrical shorts.
Locate Spark Plugs: Open the hood and locate the spark plugs, which are situated on the engine's cylinder head.

2. Remove Engine Cover (if applicable)

Sub-steps:
1. Remove any bolts securing the engine cover using a socket wrench.
2. Gently lift off the engine cover and set it aside.

3. Disconnect Ignition Coils

Sub-steps:
1. Carefully disconnect the electrical connector from each ignition coil.
2. Remove the bolts securing the ignition coils using a socket wrench.
3. Gently pull out each ignition coil from the spark plug well.

4. Remove Old Spark Plugs

Sub-steps:
1. Use a spark plug socket and ratchet to loosen and remove each spark plug by turning counterclockwise.
2. Inspect the threads and the condition of the spark plug well for debris.

5. Install New Spark Plugs

Sub-steps:
1. Apply a small amount of anti-seize lubricant on the threads of the new spark plugs (if recommended).
2. Hand-tighten each new spark plug into the cylinder head.
3. Use a torque wrench to tighten the spark plugs to the manufacturer's specified torque (typically around 13-16 lb-ft for Honda).

6. Reinstall Ignition Coils

Sub-steps:
1. Insert each ignition coil into its respective spark plug well.
2. Secure the ignition coils with their bolts and reconnect the electrical connectors.

7. Reinstall Engine Cover (if applicable)

Sub-steps:
1. Place the engine cover back onto the engine.
2. Secure it with the bolts removed earlier.

8. Reconnect Battery

Sub-steps:
1. Reconnect the negative battery terminal.
2. Start the engine to ensure proper operation.