1A Auto Video Library
Our how-to videos have helped repair over 100 million vehicles.

How to Replace Spark Plug 02-08 Nissan Maxima

Share on:

How to Replace Spark Plug 02-08 Nissan Maxima

Created on: 2013-04-30

Watch this video and learn how to access, remove, and install new spark plugs if the old ones are corroded, misfiring, or burnt out

  1. step 1 :Removing the Front Spark Plugs
    • Using a T30 driver remove the 4 bolts securing the engine cover.
    • Remove the cover.
    • Push the tab on the harness connected to the ignition coil and pull it free.
    • Remove the bolt on the ignition coil.
    • Pull the coil out.
    • Using a 5/8 spark plug socket remove the spark plug.
  2. step 2 :Reinstalling the Front Spark Plugs
    • Check the spark plug gap for .044.
    • Center the plug in the hole and screw it in. 20 â€" 25 ft/lbs
    • Push the ignition coil down over the spark plug.
    • Replace the bolt on the coil.
    • Reconnect the lead.
  3. step 3 :Accessing the Rear Spark Plugs
    • Using a flat blade screwdriver loosen the clamp on the intake hose.
    • Pull it off the intake.
    • Disconnect the green connector.
    • Remove the middle line hose clamp and hose from the intake plenum.
    • Using a 10mm socket remove the front two bolts from the intake plenum.
    • Using a 12mm socket remove the two bolts in the bracket on the back of the plenum.
    • Remove the vacuum line on the back of the plenum using pliers to remove the clamp and twist the hose free.
    • Remove the two 12mm nuts on either end of the plenum.
    • Remove the three 12mm bolts along the front of the plenum.
    • Using a screwdriver disconnect the lead on the side of the intake plenum.
    • Disconnect the harnesses and hose from the passenger side of the intake plenum.
    • Disconnect the two vacuum lines and the harness from the front of the intake plenum.
    • Lift the plenum up and out of the way to access the coils.
    • Follow the previous steps on changing the coil and spark plug.
  4. step 4 :Reinstalling the Intake Plenum
    • Make sure there are no hoses or harnesses in danger of being between the plenum and engine intake.
    • Fit the plenum down into place.
    • Reconnect the intake tube and replace the clamp.
    • Reinsert the three bolts and two 12mm nuts. 25 â€" 30ft/lbs.
    • Reinsert the 10mm bolts.
    • Reconnect the hoses and harnesses along the intake plenum.
    • Reconnect and insert the bolts on the two bracket of the intake plenum
    • Make sure everything has been reconnected.
    • Look for clean or shiny spots. These often indicate a disconnected part.

Tools needed

  • 12mm Socket

    Socket Extensions

    Flat Blade Screwdriver

    T30 Driver

    10mm Socket

    Ratchet

    Needle nose pliers

    5/8 Inch Socket

Brought to you by 1AAuto.com, your source for quality replacement parts and the best service on the internet. Hi, I'm Mike from 1A Auto. I hope this helpful video helps you out. The next time you need parts for your vehicle, think of 1AAuto.com. Thanks. In this video, we're going to show you how to replace the spark plugs on this 2003 Nissan Maxima, pretty much the same as any Maxima that has this 3.5 liter motor in it. You'll need a T30 Torx driver, a 10mm socket as well as a 5/8 spark plug socket with an extension. You'll also need a 12mm socket and pliers and probably a flat blade screwdriver. In the first part of the video, we'll just show you actually how simple it is to replace the plugs, the front three plugs. The rear three plugs, you do have to take the upper intake plenum off. On the second part of the video, that's what we'll show you, is how to remove and reinstall that upper intake plenum.

Okay, start with a T30 Torx driver and remove the four bolts that hold the top engine cover. So the coils on this side of the engine really easier to see, 10mm socket, remove the bolt and there's a connector here. They have a tab on the top. Push the tab and push in the tab with that finger. Disconnect. Just take the bolt out. Okay, and then the coils come right out.

To remove the plugs, you'll need a 5/8 spark plug socket with extension. This socket is designed to kind of grab on to the plug. Put it down in. Okay. The plug comes up. You see I have some paper towel. My socket's kind of old so the extra pieces of paper towel just helps grab onto the plug. Okay, when you reinstall the plugs, either new ones or if your checking your old ones and reinstalling them, you want to make sure that they're gaped correctly. It should .044. Okay, the gap tool here, .044. Good check on the condition too. These things go in its nice and perfect with a little bit resistant when I put my gap tool in there.

That's good. Just make sure it's set right into the spark plug socket really well. Down in carefully, nice and centered. It goes right in. Okay, I'm just going to fast forward here as I put them in. When you tighten the spark plugs, you'll only want to have them between 20 and 25 foot pounds which is not overly tight. You want to be careful not to over tighten them 'cause they can cause problems coming up when they're done with their life. Okay, new coil from 1A Auto, just like the original. It should go right in there just the same. Down in. Just push it straight down to reconnect the lead. Put the bolt back in. Okay, and you can see the two in the front here. Just use that one and you may be saying, "Well how about the rear ones?"
The rear ones are pretty easy. You do have to take this intake plenum off and I'm going to show you that real quick. Okay, we're going to start up top here with a flat blade screwdriver. Loosen up the clamp that holds the intake hose on. That's nice and loose. Okay. Make sure you can pull this off the intake and then we're going to disconnect the green connector here. Okay, just push on the little tab just on the front here and take that off. Then we're going to disconnect this middle line here and then pull that clamp off and then use my pliers to grab onto the hose to make sure the hose twist a little bit and pull that off.

With a 10mm socket, we're going to take off this bolt here and put that bracket to the side and we're going to take off this bolt here. Okay, these up in here, it allows that to come off. Now, we're going to use a 12mm socket. Okay, I can't really show them to you because they're back in here but if you take your hand and reach back in here, you'll feel two bolts, okay. They're going in this way. Okay, you'll need to remove those two bolts at the bracket holding up the back of the plenum. As I'm looking back here, I can see that there's another vacuum line. I'm just going to use my pliers. There's a clamp. Squeeze the clamp then you need to grab off with the pliers to get the hose to twist. Pull it off.

Then I'll take my extension and there are two 12mm nuts on each end and then three 12mm bolts to remove. Disconnect this lead. I'll take my screwdriver and pry out the clip that holds the harness. Use the screwdriver and again pry the clip off that holds to the harness. Use a little push on the two teeth on each side. Okay. Out here on the back side, you see I disconnected this here. There's also two connectors, little tabs. Disconnect them then squeeze this clip as well and disconnect this line. Pull these two vacuum lines up on their clip and vice versa. Disconnect that connection and pull this up. Now, you can lift it up and push it out of the way enough. I'll show you here. We're going to lift it up out of the way that you can now get to the coils. You may want to just have somebody help you out lift it out of the way. It's the middle one that's probably the most difficult one. I'm just going to fast forward as I put the coil back on. It's just pretty much of a reversal procedure. Make sure that there's nothing, no wires or anything between the upper intake plenum and the lower intake before you put it down. Get it down into place and make sure that you get the intake hose over the opening of the plenum on the driver side and then put it down in place.

Just check underneath to make sure there's nothing between the plenum and the engine intake. I can see it go down on the stud here. It goes down. Lift it up on the back side here. Okay, down there. Pull the intake tube up. Once you get that intake tube on, it goes down nice and easy. Okay, once it's in place, take and put the two nuts and the three bolts that hold the upper intake to the lower intake. I'll put those in place. Then I actually put the two bolts that hold the rear of the intake to the bracket, put those in place and tighten them up and after I tighten those rear end up then I'll tighten the plenum down. You'll want to tighten it down to about 25 to 30 foot pounds.

I basically kind of try and go methodically from the passenger side rear, reconnect the two connections back there and those two vacuum lines then come around to the front and bolt on the two brackets and make sure that the connections are reconnected. Then around to the throttle body in air intake side. Bolt everything back together. Make sure all of the electrical connections are connected and all vacuum connections are connected. Basically what I do is after I'm done, I just look very carefully around. You basically look for any clean or shiny spot.

Basically when you take connectors apart, you'll notice they're dirty but when you take them apart, the part that had fit together nice and clean, it's a good idea just to look around and look for any clean spots or shiny spots that might indicate that there's something that hasn't been reconnected. Once you have it all reconnected then you can put your intake cover back on.

We hope this helps you out. Brought to you by www.1AAuto.com, your source for quality replacement parts and the best service on the internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the internet and in person.

2001 - 2003  Infiniti  QX4
2002 - 2006  Nissan  Altima
2003 - 2006  Nissan  350Z
2003 - 2007  Nissan  Murano
2001 - 2004  Nissan  Pathfinder
2005 - 2008  Nissan  Pathfinder
2004 - 2009  Nissan  Quest
2002 - 2004  Infiniti  I35
2003 - 2008  Infiniti  FX35
2003 - 2007  Infiniti  G35
2005 - 2010  Nissan  Frontier
2002 - 2008  Nissan  Maxima
2005 - 2008  Nissan  Xterra
2006 - 2008  Infiniti  M35
2009 - 2012  Suzuki  Equator

Spark Plug (Set of 6)

Nissan Infiniti Suzuki 6 Piece Spark Plug Set NGK NGETK00008

Part Details:

  • Platinum
  • Features & Benefits
  • 6 Piece

Auto Repair How Do I Check or Add Automatic Transmission Fluid to My Car or Truck

Learn how to check and refill the automatic transmission fluid in your vehicle. Some details will vary between models, but the process is similar for many

Search Videos
Go To Top

Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.