In this tutorial, you will find instructions on how to replace the spark plugs on a Nissan. This guide applies to the V6 cylinder, 3.5L engine.
What you will need
Park you Nissan on level ground. Turn off the ignition and set the parking brakes.
Allow your engine to cool down for at least 30 min.
- Pull the hood release on your Nissan and open the hood.
- Locate the battery in the engine bay. Disconnect the negative battery terminal.
Remove the 10mm bolts on top of the engine cover. Remove the engine cover. If no bolts are present the cover can be removed simply by lifting it upwards.
Remove Ignition Coils. Unplug the electrical connector from the ignition coil. Press the small tab then pull. Do this for all three front coils.
- Remove the 10mm bolts that secure the coil in place. Pull the coils out.
- This engine also has three coils hidden under the intake manifold. To replace those spark plugs, remove the intake manifold by removing the 10mm bolts that hold it in place. Disconnect the air intake from the manifold. Remove any hoses and pull out the intake manifold.
Use the spark plug socket, extension, and ratchet to remove the spark plugs from your Nissan. Use a magnetic pickup tool to pull out the spark plugs.
Install new spark plugs. Use anti-seize on the spark plug threads. Install new spark plugs by hand on your Nissan until they are finger tight. Then use a ratchet to tighten an additional 1/4-1/2 turn. Ideally, use a torque wrench to tighten the spark plugs. Typical torque values are 10 to 15 lb-ft for 14mm threads and 15 to 20 lb-ft for 18mm plugs. Standard spark plugs should be gapped to 0.043.
Install Ignition Coils. Reinstall coils by pressing them firmly on the spark plug. Tighten the 10mm bolt.
- Ensure the connectors don't get mixed as they need to be in the same coil as before removal.
- Start the car. Reinstall the engine cover. Reconnect the negative battery terminal. Remove any tools from the engine bay and start the car.
Typical torque values are 10 to 15 lb-ft for 14mm threads and 15 to 20 lb-ft for 18mm plugs. Standard spark plugs should be gapped to 0.043.
Spark Plug Gap
- Typical: Gap: 0.043
Most spark plugs come pre-gapped and do not require gapping. Check your owner's manual.
Nissan recommends that you replace the spark plugs every 105,000 miles. This recommendation can vary if you have iridium, platinum or standard spark plugs.
What if I don't replace my Nissan spark plugs on time?
This is a list of issues you may notice if you don't replace the spark plugs at the recommended interval.
- Check Engine Light On
- Fault Codes: P0300 P0301 P0302 P0303 P0304 P0305 P0306
- Engine Misfire
- Poor Fuel Economy
- Engine Shaking