Want to change spark plugs on a nissan 2000 maxima
What do I need to remove to accesses the spark plugs at the rear of the engine. i figured out how to remove the plugs in the front of the engine, however the plugs towards the rear of the engine appears as if I have to remove a lot of stuff. I am kind of handy, but I have never tuned up this car I have over 100.000 miles on the original plugs and they are due to be replaced. Please if you can help it would be great. I Lost my job so I can't afford to go to a shop with certified mechanics. I need to do this myself.
Re: want to change spark plugs on a nissan 2000 maxima
The rear plugs on this car are relatively easy to change. First locate the electrical connectors on the rear coils and remove them. Next, take a 10mm socket and remove the bolt that hold the coils to the engine block and remove each coil. The last step is to remove each plug and install the new ones. You may need various extensions and such, but it is very do-able and you do not need to remove the air plenum as you do with the 3.5 engine used in 2002.
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this job is not for a newbie. so here we go with instructions. i believe you posted under 2003 nissan maxima section for replacing plugs. remove engine trim cover that covers manifold and valve cover. remove ign coils on frt valve cover and remove and install new plugs for rear bank plugs you would need to remove upper intake plenum. disconnect all necessary electrical connectors and vacuum lines. make sure you are aware where the vacuum hoses go for reinstallation. remove ign coils on rear bank valve cover. remove and install new plugs. reassemble all parts.
This is possibly true, especially if you have a 6 cylinder. They don't actually remove the whole intake from the motor, there is a section of the intake system that can be removed fairly easily and then the plugs can be accessed. Unfortunately, this design was more to push the price of a tune up higher than a needed design change, at least in my opinion. Since you have to remove that part most people are more inclined to take a vehicle to the dealer to replace spark plugs instead of doing it themselves and as you know, the dealership prices are higher than anywhere else and the mechanics have the same qualifications other mechanics have.Typically no seals need to be replaced when this is done but it does take more time and that is where the dealership makes it's money.
most likley a ignition coil is failing, is unfortunatly common for the A33 maxima. these engine have 6 coils, one for each cylinder. the only way to work out which of the 6 is the faulty one is to remove the little cover over the front bank of spark plugs, has 4 allen key bolts, then you can see the front 3 coils and the rear 3 are inbetween the manifold pipes. each coil wiring will have a button/leaver on the connectors (i think they are green) and if you push this in will release connector.
when the engine is missfireing unplug one coil at a time then reconnect after. if the engine runs worse that coil is working. if you unplug 1 that makes no change, that is the the one thats not working. replace the coil and the spark plug.
do not worrry, there is only 12volts at these connectors, not spark plug voltage
The Spark Plugs are located under the Coil Pack in the Cylinder Head. You need to remove the silver cover on the front part of the engine which are held down by Allen Bolts to access the Coil Pack. You will need to remove the two bolts holding the Coil Pack to the Cylinder Head. Pull up on the Coil to remove the Coil and inside the hole will be the Spark Plug. The rear part of the engine next to the firewall has no cover so you will need to just remove the Coil Pack. The Nissan Maxima is very picky about the brand of Spark Plugs you replace them with, You should only use NGK Platinum Plugs or Better in your Maxima, Any other brand will make your car run rough.
For the 3 spark plugs in front:
1. You would have to remove the plastic protective cover (this cover is silver&red w/ the words "nissan and v6 3000")
2. unplug connector and remove coil (DO NOT mix up the coils, keep the same coils on the same cylinder)
3. Remove spark plug
Rear 3 plugs: located on the rear of the intake (the black pipes atop the engine). there are 3 openings at the rear of the black intake pipes, each opening has a coil mounted.
1. Unplug coil connector and remove coil
2. remove spark plug (you'll need a long extension)
***Installation is reverse, be sure not to over tighten the plugs!! Use anti-seize compound on all the new plugs threading. Hopefully this helps!!
They are under the plastic covers that are in the center of each valve cover, there should be 2 or 4 allen key screws holding the covers on, when u get them loose u will see 3 coil packs under each cover, thease supply the spark for the plugs, u must unplug the wire harness from each one then remove the 2 screws that hold it down, slide it out vertically because there is a long stalk that goes down to the plug, u will need an extention on your rachet to reach the plug. The front 3 are easy and the rears are harder and require some tight space jockying but it is not impossible for someone with moderate mechanical skills. good luck !!!
Using an Allen/Hex key tool, remove the cover to gain access to spark plug holes. This engine has coils at each plug, so after unplugging the electrical connection, you can use either a Phillips screwdriver or an 8mm socket on an extension to remove the 2 screws securing each coil. Pull out the coil and then use a 5/8" spark plug socket on a 6" extension to remove each spark plug. Gap the new plugs to .040" and apply anti-seize lubricant to the threads. Install each plug, slowly at first, so as not to cross-thread it. Torque the plugs to 18 lb/ft. Apply some dielectric grease to the inside of the spark plug boots and re-install the coils. Plug them all back in and re-install the covers. You're done!
You have to remove the plastic cover on the front bank of cylinders and then remove the 3 ignition modules these are recognized by the three wire connector attached to each one then with an 6 inch extension and spark plug socket remove the plugs . The rear set of plugs is about the same only the ignition coils are not covered once you see what the front ones look like you will be able to do the rear ones with no problem