HOW-TO: Replace Spark Plugs and Engine Air Filter (45k maintenance) For 2018 Infiniti QX30
The maintenance schedule for our QX30s calls for replacement of spark plugs and engine air filter every 45,000 miles. This is a relatively straightforward service that requires only basic hand tools and is well within the capabilities of a competant DIYer. You do not need to lift the vehicle off the ground; all access is from the top of the engine bay.
The following parts are necessary:
Spark Plugs (4x NGK SILZKFR8E7S)
Engine Air Filter (I used Mann C27004)
The following tools are necessary:
Pliers (to remove spring-style hose clamp)
Small flat-blade screwdriver (to pry up on electrical connector lock tabs)
Torque wrench(es) (capable of 80 in-lb and 17 ft-lb)
Torx T-25 socket
Torx T-30 socket
7mm socket
14mm spark plug socket
Ratchet or T-handle(s)
~10" socket extension
To begin, open your hood and prop it up with the hood support rod.
Grab the plastic engine cover and pull up at the corners. It is held in place by five rubber grommets. Pulling straight up near each grommet will pop the grommet off of the stud.
Once removed, you can see the engine.
Use a 7mm socket and appropriate ratchet/t-handle or a nut driver to loosen the hose clamp between the air filter housing and the air intake tube.
Use a 7mm socket and appropriate ratchet/t-handle or a nut driver to loosen the hose clamp between the turbocharger inlet and the air intake tube.
Use a Torx T-25 socket and appropriate ratchet/t-handle to remove the four (4) screws that attach the upper air box to the lower air box. These screws are "captive" and will remain with the upper air box even after being full unscrewed.
Grab the upper air box and pull it up and away from the lower air box. Then pull the upper airbox to the right, separating it from the air intake tube.
Use a pair of pliers to squeeze the spring-style hose clamp on the top right of the air intake tube. You can easily pull the hose off of the barb when the hose claim is squeezed.
To the left of the hose barb exposed by removing the previous tube, there is another hose with a 90-degree connector. Disconnect this by squeezing both sides of the ring where the ridges are. The connector will slide up and off when squeezed. Use care to remove the hose without breaking the clip.
Continuing left, there is another electrical connector that must be removed. A small flat blade screwdriver can help pry the locking tab up. Once sequezed, the connector should release.
Above the electrical connector we just disconnected, there is a medium diameter hose. This can be removed by grabbing the hose and pulling it away from the tube it is connected to.
To the left there is an electrical harness that zip-tied to a metal clip, which is attached to the air intake pipe. Use a small flat blade screwdriver to pry up on the metal clip and detach it from the air intake pipe.
发表于 2023-9-29 18:21:08
