Tuesday, October 25, 2011

How do I change the spark plugs on an Infiniti QX4?

I would like know how to change spark plugs Specifically for an Infiniti QX4. I would also like to know what tools will I need to perform this task. I was told that the spark plugs on an Infiniti are positioned differently from other cars. This is why I am asking specific details on changing spark plugs for an Infiniti QX4.
How do I change the spark plugs on an Infiniti QX4?
Not as straight forward an operation as you might hope. First, locate the coil packs. The Infiniti has a small coil mounted on top of each spark plug. This is why you will not see any heavy gauge spark plug wires running from a coil or distributor to the obvious location of the spark plug. The coil packs are attached with a 10mm bolt. In many cases other items, (air filter assembly, brackets loaded with stuff) must be removed even to see the coil packs. Be very careful with the coils as they are expensive to replace. The coil pack will reach down into the engine 8-10%26quot; to where the spark plug actually sits. You will need a long socket adapter to reach in and actually remove the spark plug. To change all 6 plugs, plan to spend about three hours if you have never done this before.
How do I change the spark plugs on an Infiniti QX4?
you should either get ahold of the repair manual (or online version like alldata) to make sure you do it correctly with all the right torques.



Or find an Infiniti forum and ask there to see if others have done it and written it up.



The spark plugs themselves should be pretty standard procedure, but likely you need to loosen and move a bunch of parts to access them, which is the harder part.