In this guide, you will discover step-by-step instructions on how to change the spark plugs and ignition coils on Honda four-cylinder engine.

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Changing the spark plugs top top a Honda is really easy and also can be completed in under one hour.

The video in this guide is indigenous a 2015 Honda public with a four-cylinder engine. This guide will also aid owners that Honda Accord, CR-V, Fit, and also other models with the four-cylinder engine.

Parts Required

Honda Iridium Spark PlugsDo not gap iridium spark plugs.Older Honda vehicles usage copper and also platinum spark plugs.OEM Honda sparks plug brand are made through Denso and also NGK.


Park your Honda in a safe location. Set the parking brakes and remove the key.
Pull the hood release under the hood to open the hood.
It is recommended to disconnect the battery an adverse terminal and permit the engine come cool down before you obtain started.
Remove the engine covering if your Honda has one. There will be 2 or 4 10mm bolts that need to be removed. Unplug the electric connector native the ignition coil by pressing an initial then pulling the connector far from the plug.
Remove the 10mm bolts the secure the ignition coils.
Pull out the ignition coil. If the coils don"t come out, shot twisting them slightly.
Use the spark plug socket, extension, and ratchet to remove the spark plugs.
Apply anti-seize grease come the subject of the new spark plug. Only apply a slim coat on the thread.Slowly move the brand-new spark plugs right into the head. execute not autumn the spark plugs as this can damage the spark plug.Once the gasket has made contact with the cylinder head, use the talk wrench come tighten them all to the encourage tightening torque. Speak Honda spark plugs to specification. Typical Honda spark plug talk is: come 13 ft/lb, 156 in-lb, 17.63 Nm. Install the ignition coil by pushing them under firmly top top the spark plug.Connect every the wires come the ignition coil. Perform not swap the electrical connectors; they must go ago in the same precise position together before.


Don"t use power tools to screw the spark plugs.If friend accidentally strip the spark plug thread, you will certainly either should remove the head and also repair it.The tightening torque because that a spark plug alters with the diameter the the spark plug.

Torque Specification 

Typical Honda spark plug talk is: to 13 ft/lb, 156 in-lb, 17.63 Nm. Verify by calling your dealer. 

Recommended Interval

Honda vehicles are an extremely reliable however what plenty of owners forget is that spark plugs are a maintain item and should be replaced around the 80,000 and also 100,000-mile mark. Plenty of owners forget to adjust the spark plugs on your Honda until they obtain an engine misfire or access time 150k or also 200k miles.


How often should I readjust the spark plugs?

Most Honda vehicles consisting of Accord, Fit, Civic, Oddyse,y CR-V, Fit, etc., need the spark plugs adjusted every 90,000 miles. Older models with cooper spark plugs must be changed every 30,000 miles. The correct Honda spark plug readjust interval is published at the end of her owner"s manual.

What is the exactly Honda spark plug socket size?

5/8" spark plug socket or a 16mm socket.

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What is the exactly Honda spark plug gap?

A suitable plug void will be detailed on the emissions label that is sticked under the hood or close to the radiator core support. Common values: .040-.050

Honda spark plug thread size?

The usual Honda spark thread dimension is 14mm x 1.25mm.