how to change spark plugs on Honda Accord 9th Generation (2013-2017)

Honda Accord 10th Generation (2018-2022)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

581 words

Problem Statement

Learn how to change spark plugs on a 2013-2017 Honda Accord. Step-by-step guide to improve engine performance and fuel efficiency.

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 before starting.

Symptoms

•Engine misfire or rough idle
•Decreased acceleration or power
•Poor fuel economy
•Check engine light illuminated
•Excessive engine vibration

Diagnostic Steps

1
Gather necessary tools and parts for the spark plug replacement.
2
Disconnect the negative battery terminal to prevent electrical shorts.
3
Remove the engine cover if applicable to access the spark plugs.
4
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to spark plugs or ignition.
5
Inspect existing spark plugs for wear or fouling before replacement.

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 (including 10mm socket)
•Torque wrench
•Spark plug socket (typically 5/8”)
•Extension bar
•Ratchet
•Gapping tool (if necessary)

Parts Required

•New spark plugs (check specifications for correct type)

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Diagnostic Steps

1
Gather necessary tools and parts for the spark plug replacement.
2
Disconnect the negative battery terminal to prevent electrical shorts.
3
Remove the engine cover if applicable to access the spark plugs.
4
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to spark plugs or ignition.
5
Inspect existing spark plugs for wear or fouling before replacement.

Solution

1. Preparation

Tools Required:
- Socket set (including 10mm socket)
- Torque wrench
- Spark plug socket (typically 5/8”)
- Extension bar
- Ratchet
- Gapping tool (if necessary)
Parts Required:
- New spark plugs (check specifications for correct type)
Safety Warnings:
- Disconnect the battery before working on electrical systems.
- Allow the engine to cool before starting.

2. Remove Components

Sub-steps:
1. Disconnect the negative battery cable using a socket wrench.
2. If present, remove the engine cover by unscrewing the bolts or clips securing it in place. Set it aside.
3. Carefully disconnect the ignition coil connectors from each spark plug by pressing the release tab and pulling them off.
4. Remove the ignition coil bolts using a socket wrench, then gently pull out the ignition coils to access the spark plugs.

3. Remove and Replace Spark Plugs

Sub-steps:
1. Use the spark plug socket and ratchet to carefully unscrew each old spark plug from the cylinder head. Turn counterclockwise.
2. Inspect the old spark plugs for signs of wear, such as carbon buildup or damage.
3. Check the gap on the new spark plugs using a gapping tool and adjust if necessary according to manufacturer specifications (usually around 0.044 inches for Honda).
4. Carefully thread the new spark plugs into the cylinder head by hand to avoid cross-threading, then tighten them using the torque wrench to the manufacturer's specified torque (typically around 13 lb-ft).

4. Reassemble Components

Sub-steps:
1. Reinstall the ignition coils over the new spark plugs, ensuring they seat properly.
2. Secure the ignition coils by tightening the bolts to the specified torque (usually around 7 lb-ft).
3. Reconnect the ignition coil connectors until they click into place.
4. If removed, reattach the engine cover and secure it with bolts or clips.
5. Reconnect the negative battery terminal.