The spark plugs on a 2008 Honda Accord are located beneath individual ignition coils on the engine’s valve cover. In the four‑cylinder models there are four plugs under four coils; in the V6 version there are six. Access is from the top by removing the engine cover and lifting the coils away from the plugs.
Engine variants and plug layout
Four-cylinder engine (2.4L)
To locate and access the spark plugs on the 2.4L four‑cylinder, the ignition system uses a coil-for-each-plug configuration. The plugs sit directly under the corresponding ignition coils on the top of the valve cover.
Here are the steps to locate and access the four spark plugs on the 2.4L engine:
- Remove the engine cover if your model has one.
- Identify the four ignition coils mounted on top of the valve cover, one for each cylinder.
- Disconnect the electrical connectors from each coil, keeping track of position.
- Remove the coil bolts (if applicable) and lift each coil straight up to expose its spark plug.
- Use a spark plug socket with a long extension to unscrew and remove the plug from the cylinder head.
- Inspect the old plug, and install a new one to the manufacturer’s recommended gap.
- Reinstall the coil, reconnect its electrical connector, and torque bolts to spec.
- Repeat for the remaining cylinders, then replace the engine cover.
Concluding: In the 2.4L Accord, each spark plug is tucked beneath its own ignition coil along the top of the valve cover, arranged in a straight line from the front to the back of the engine.
Six-cylinder engine (3.0L)
The 3.0L V6 also uses a coil-on-plug setup, with one coil sitting over each spark plug. The six plugs line up along the top of the engine and are similarly accessed by removing the coil assemblies.
Here are the steps to locate and access the six spark plugs on the 3.0L engine:
- Remove the engine cover if present.
- Locate the six ignition coils on top of the valve cover—one per cylinder.
- Detach the electrical connectors from all six coils, noting their locations.
- Loosen and lift each coil off its corresponding plug to reveal the spark plug.
- Use a spark plug socket with a suitable extension to remove each plug.
- Check and set the proper gap, then install new plugs to the recommended torque.
- Reinstall the coils and their connectors, and torque any bolts per spec.
- Reassemble the engine cover and confirm everything is secure.
Concluding: On the 3.0L V6, the six spark plugs are arranged in a row along the top of the engine, each beneath an individual ignition coil.
Tips and safety considerations
Always consult your owner’s manual or a service manual for the correct torque specs and gap sizes, as they can vary by plug type and engine code. When working on an older engine, consider replacing ignition coils and inspecting ignition wiring at the same time to prevent misfires.
Summary
For a 2008 Honda Accord, spark plugs are located under individual ignition coils on the engine’s valve cover. The four‑cylinder model has four plugs (one under each coil), while the six‑cylinder model has six (one under each coil). Access is from the top after removing the engine cover and lifting off the coils to reach the plugs, which are replaced in place with the engine restored to the proper torque specifications.