all right today we are going to be doing a tune-up and oil change on a 2014 nissan this
will apply for a lot of models the v6 so the first thing we're going to do is unclip the air cleaner
and then we're going to remove the 10 millimeter bolts
holding down this air snorkel here so we can get the whole assembly off
all right now that we got that front snorkel removed you can see that we can remove the air
cleaner a bit easier i want to go ahead and take out that mass air flow sensor there and remove the
clamp there and right there and take out these two 10 millimeter bolts to remove that cover
all right as you can see when everything's removed you can start to see things
a little better just put all your screws back into the same spots where you pull them out
makes it easier you do not have to remove this lower air cleaner assembly part of
the box i did because it was dirty and it just shows a little more view of everything for you
there's a screw right there and it just pops right out and it collects a lot of dust so
it is good to take it out and just dump the dust out so the new filter don't get saturated
now we want to start looking at everything over here you see your front bank spark plugs right
there super easy to get to the next set of spark plugs are underneath the manifold so we gotta
start removing some things off of the manifold itself leave it connected for now we're gonna
take out these three ten millimeter bolts that are holding down these different solenoids and vacuum
ports and all that want to take those off and just lay them forward all right i've already pulled the
manifold but i'm going to go ahead and go through everything that was disconnected this is the
easiest quickest and safest way to do this without disconnecting all the components unnecessarily
so we're going to disconnect the throttle body here i'm just going to set that off to the side
right there i'm sorry for the glare from the sun and then like we talked before we had these three
um vacuum manifold things here we disconnected all three of those put the bolts back in there
also the vacuum manifold um rail right here that they go to pulled out
the vacuum fitting out of there so that we can get it out of the way everything kind of swings back
we'll take that one out so out of both the vacuum pots we're gonna take the
vacuum hoses out and then the one right here and take that bolt out now you should be able to lean
everything now you see the manifold is clear all this was on there just lean it back out of the way
same thing with this hose that goes down right there i want to go ahead and just pop that vacuum
hose out pop that one off to the side now you can see we have all the vacuum hoses still connected
we only disconnected two vacuum hoses three i'm sorry actually let's take that back four vacuum
hoses the two vacuum pots the one big one here and the one going up here to the back of the manifold
so once that's all disconnected we have everything kinda out of the way now in the back here
there's gonna be a few vacuum hoses and one of them you can get off while it's in here
and there's a bracket back there a 10 millimeter bracket and i'll show that once i get all this off
but you would disconnect those hoses and then pull the manifold off you're gonna have two nuts
on each or one nut on each end for a total of two nuts and four long bolts in the middle take those
six out and the manifold will pop up all right as you can see the manifold is off i'm gonna
get some paper towels to go ahead and line that so you don't have anything fall into your engine
all right we're gonna look at the back of the manifold you're gonna have this bracket here which
has a 12 millimeter bolt and then a 10 millimeter under it and then you have two vacuum fittings so
the larger vacuum fitting on the top here you can get off with the manifold on the other one you
can just lift out of the way and then you'll be able to get it back here that 10 millimeter bolt
is this um ac line here that's the only thing holding the manifold there so just disconnect
it and pop it off it comes right off and now you have access to your three back spark plugs
so take the three coils out the 10 millimeter bolts and drop the new plugs in
all right to change the spark plugs you're going to need a 3 8
wrench the extension and a 14 millimeter
spark plug socket these ones are the newer skinny style so first thing you want to do
is go ahead and grab your connector i like to push in first and then pull out
and that will release it if not you can get a little pick in there and pry that up
and you want to remove this 10 millimeter bolt and pull this coil out once the coil is out go
ahead and insert your spark plug socket get it firmly on there and loosen it out
all right we have the spark plug removed the one on the left is the oem original denso that
came from the factory and the one on the right is the ngk which is a excellent replacement
this car's got about 150 000 miles on it so you can see that these plugs
have never been changed and look at the electro gap there it's much larger than that one
so this should quite improve the performance of the car go ahead and put the socket back i mean
the spark plug back into the spark plug socket and hand thread it down
okay once you have hand tightened the spark plug all the way down until it seats put the ratchet
on the extension and turn until it stops and go about a quarter to three eighths turn more
the procedure is the same for all the spark plugs front and rear go ahead and change all those now
all right once you have the six spark plugs and six coil packs back in and secure the next thing
you're going to want to change is the pcv valve which is back here and that's that lower hose that
was on the intake manifold it's a 23 millimeter uh you generally they're really easy to take off
yeah see comes right off so unscrew that and put a new pcv valve in right we got the new pcv
valve in now what we're going to do is we're going to clean up the
intake manifold mating area here get all the oil off of it and everything and now would be
a good time to check your gaskets normally they do not need to be changed but if yours are not in
good condition go ahead and change them and then we're going to set the manifold back on its spot
okay we sat the manifold down i just finger tighten the two end nuts just to hold it in
place and you want to look around make sure you have no wiring harnesses or vacuum hoses pinched
underneath it forgot to mention now would be a great time to go ahead and clean the
throttle body out and we're going to go ahead and start putting the various components back
on and first thing you want to do is go ahead and tighten down the manifold and do it in a
crisscross pattern it's always good even torque all the way across and tighten it down to specs
all right once you have the manifold tightened back down we're gonna start working on these
back two connections the vacuum hoses there the one from the pcv valve that we replaced
up to the back and one of the vacuum lines i think coming off the brake booster there
and then we also want to work on that bracket right in there
and put that 10 millimeter bolt back in there let's get all that back together okay we've got
the two hoses hooked back up down there and that back bracket with the 10 millimeter bolt in there
now we're gonna work on putting this vacuum manifold assembly back on and these wire i mean
this metal rail that crossover and everything else okay we put back the three vacuum solenoids
one two three the two bolts for the vacuum manifold rail here the metal one
reconnected back the vacuum line there put this vacuum line back in its holder
bolted this metal section back to the top of the manifold and now all we're going
to do is connect the four vacuum hoses that we disconnected the two dash pots on each side here
one two three and then the fourth one was this one but when you put in this
vacuum modulator or valve whatever they call it back on you plug that in with it so let's
get all these vacuum hoses hooked back up once everything's hooked back up you want
to go ahead and reattach your throttle body to the intake manifold with the four allen heads
all right once the throttle body is bolted back in you wanna go ahead and take the intake snorkel and
put it back on it has this little piece that goes around the back of the engine this side
does not connect to anything it's just the air silencer and there is a little hole where this
pops right into like a grommet so just get it on there and feel around the back and pop this little
silencer in there and then tighten down the one clamp that goes through the throttle body
all right we got the intake snorkel back in
part of the pcv system plugged back in it just slides in and clamps down we put the lower uh
air cleaner housing back in one bolt it just pops down new air filter and on the top half of the
air cleaner you're going to see the mass airflow sensor in there i like to go ahead and use mass
air flow sensor cleaner do not use brake clean uh they make a special cleaner for this i like to
go ahead and clean it out along with the throttle body because during the tune up this will all help
improve the performance and gas mileage so we'll spray that out and get everything hooked back in
all right we got everything hooked back up you do not need to hook up the
front snorkel here yet or place the engine cover back on because we want to start it and make sure
there's no weird noises or check engine lights just double check your work make sure everything
is back where it's supposed to be and nothing's loose go ahead and start the vehicle and make
sure you don't hear any abnormal noises or check engine light all right the vehicle started right
up as you can see it just has the oil maintenance reminder on so we will change the oil on this
come around to the
front and everything sounds quiet and smooth there's no weird noises
just let the car fully warm up and make sure you don't have a light and that's all it is to do a
tune-up on these v6 nissans and infinities i hope this helps thanks for watching please subscribe