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How to Replace Spark Plugs 08-12 Honda Accord

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How to Replace Spark Plugs 08-12 Honda Accord

Created on: 2018-02-27

How to repair, install, fix, change or replace rusted, corroded, or stuck spark plugs on 2008 Honda Accord.

  1. step 1 :Removing the Ignition Coil
    • Remove the four 10mm bolts from the engine cover
    • Remove the engine cover
    • Disconnect the wiring harness
    • Remove the 10mm bolt from the ignition coil
    • Remove the ignition coil
  2. step 2 :Removing the Spark Plug
    • Remove the spark plug with a 5/8 spark plug socket
  3. step 3 :Installing the Spark Plug
    • Insert the spark plug into the socket
    • Tighten the spark plug by hand with a socket extension
    • Torque the spark plug to 13 foot-pounds
  4. step 4 :Installing the Ignition Coil
    • Insert the ignition coil into place
    • Tighten the 10mm bolt to the ignition coil
    • Connect the wiring harness
    • Insert the engine cover into place
    • Tighten the four 10mm bolts to the engine cover

Tools needed for replacement

  • Ratchets & Related

    Socket Extensions

    Torque Wrench


  • Sockets - Metric

    10mm Socket

  • Sockets - SAE

    5/8 Inch Spark Plug Socket

Installation Video
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Hi, I’m Mike from 1A Auto. We’ve been selling auto parts for over 30 years!

To open the hood, go inside. The latch is way down here by your left foot. Hood release for the safety is under here. Lift it up. The hood has two positions. There's one here. It also has a service position down here. Push the hood away a little bit, this way you don't bump your head into the hood. Now, remove this plastic cover.

There's four 10 millimeter nuts on top. Use a socket extension and ratchet to remove them. It'll show that they're actually a bolt, with what looks like a nut on top. They have a little shoulder on them. Then put these bolts aside so I don't lose them. With the plastic cover off the engine, underneath it are your coils. All four coils can be removed in the same way. Push down on the connector lock. Pull the connector off.

There's a ten millimeter bolt holding the coil to the top of the valve cover. Break that free and put that aside. Pull the patch and lift straight up off this spark plug on the valve cover and out of the head.

Spark plug is located down in here. Just make sure the hole is clean and clear of any debris before you remove the spark plug, because that will open it up to your cylinder. This one looks nice and clean, no oil or anything. I'm using a 5/8th spark plug socket. I just have it electrical taped to the extension because the socket is a little bit loose and likes to break free from the extension when it's down in the cylinder.

Spark plug socket has a rubber grommet inside here to help hold the spark plug in it. So, when you're removing the spark plug it doesn't fall down. Going to go ahead and remove the spark plug. Get the socket extension in here. Feel your way onto the spark plug. Now remove it.

These don't have a lot of torque on them. Should come right out once it's loose. Can take the ratchet off and then just thread it out by hand. So the grommet inside of the socket lets me pull it out without having it fall down. These plugs are actually in good shape, but we're at the recommended mileage to change it.

Add a new spark plug into our socket. You always want to thread spark plugs in by hand. You don't want to cross thread them. This does have aluminum head. Gently put it down here. Sometimes if you go backwards a little bit, you can actually feel the threads kind of catch. Then we can start to thread it in. And just thread it all the way in by hand. No need to use a ratchet for this. It should go in nice and easy.

These plugs are already gapped so we didn't have to gap them. That's as tight as it'll go. Now you're going to use the torque wrench. This is set to 13 foot-pounds. That will seat the gasket and seal the spark plug. If it clicks, it's all set.

Install your new coil pack. Push it right down onto the opening and onto the spark plug. It'll slide right into place.

Reinstall the bolt. Torque is 7.8 foot-pounds. It’s very light. I'm just going to do it by hand. Once I feel a good tight, I will stop. Just like that. Plug the connector back in. It'll click when it's locked into place, and then I'll just repeat this for the other three.

Reinstall the plastic cover, put these shoulder bolts back in. Just tighten them up, not too much, they're only holding onto the plastic and you don't want to crack the aluminum valve cover. So once you feel them get tight, just stop. Put the car prod back in its spot, and you're all set.

Thanks for watching. Visit us at for quality auto parts, fast and free shipping, and the best customer service in the industry.

Tools needed for replacement:

    Ratchets & Related

  • Socket Extensions
  • Torque Wrench
  • Ratchet

  • Sockets - Metric

  • 10mm Socket

  • Sockets - SAE

  • 5/8 Inch Spark Plug Socket

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