HowTo: Change Spark Plugs (M35 - VQ35DE)

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Fri Jun 18, 2010 9:06 am

Figured I'd put this out there for anyone who was interested in changing their spark plugs on their own but wasn't feeling very comfortable. I have a 2007 M35x so, at the least, this would be the same for the 2006 M35. I haven't seen the V8 or the 08/09 car so I can't say if this process is any different. This should give you the general idea though.

*Disclaimer* - I am not liable for anything you do to your car. This is just a basic walkthrough.

I took the pics with my HTC EVO 4G from Sprint (love this phone). End of shameless plug lol.

Task: Change The Spark Plugs
Time: Took me 2 hrs because I was super careful and had to figure this motor configuration out (I'm coming from a VQ30DE - 99 Maxima)
Tools/Supplies Needed:
  • Socket wrench
  • 14mm deep socket for the spark plugs (I'm not exactly sure of this size because I forgot to make note of it - I'm pretty sure it's 14mm)
  • 10mm socket + varying length extensions for all the bolts/nuts you have to take off
  • 6 spark plugs of your choice (I used 6 NGK V-Power copper plugs). Nissan motors work best on NGK plugs.
  • Spark plug gapping tool. Napa sells them for like a dollar. The plugs should be pre-gapped to .044" but I like to double check.
  • Flat head screw driver
  • An extendable magnet (this helps greatly in getting some of the bolts out without dropping them below the motor)
Process:

1) Open the hood and remove the plastic covers to give yourself some space. The engine cover is held on by 4 10mm bolts/nuts. The other two just pop off with clips.

Image

2) Disconnect part of the air intake that goes into the throttle body and move it to the side (I wire tied it to a hole near the fender).

Image

Should look like this when you're done with the first two steps:

Image

3) Loosen the engine harness by taking off the following two 10mm bolts. This will give it some slack so you can pull the coil packs out.

Image

4) Disconnect the PCV Hose to again offer a little more space to get the coil packs out.

Image

5) Unscrew this bracket (not sure what sensor this is) to allow you to remove the middle coil pack on the passenger side of the car.

Image

6) Remove the two 10mm bolts holding this sensor/bracket on the driver side part of the engine:

Image

7) Now what you're left with is 6 coil packs and spark plugs. Each coil pack has 1 10mm bolt holding it to the block. I only have a picture of two of them, but you should be able to figure this part out. Be careful unclipping the harnesses.

Image

8) Once you remove the coil packs, you should be left with just the plug.

Image

9) I believe the spark plug is 14mm deep socket, but I forgot to note this so I'm not exactly sure. Be careful unscrewing/screwing it in and the rest is reverse of removal.
Last edited by Ilya on Sat Jul 20, 2013 8:58 am, edited 1 time in total.


User avatar
fiveliterbeater
Posts: 1501
Joined: Tue Jan 20, 2009 10:57 am
Car: 2006 EVO IX, 2000 Maxima SE,2005 Altima 3.5 SE
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby fiveliterbeater » Sat Jun 19, 2010 10:22 am

eXcellent write up bud! i vote to make this a sticky! :yesnod

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sat Jun 19, 2010 11:43 am

I have a FAQ/HowTo thread (that you've probably seen) but I have no idea why the mods haven't noticed it and made it a sticky. It's in that thread (linked to here). This way there is only one sticky needed for all howto's with links to the respective stickys.

User avatar
svard75
Posts: 1564
Joined: Mon May 11, 2009 3:26 am
Car: 06 M35x
Location: Toronto, Ontario, Canada

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby svard75 » Sat Jun 19, 2010 3:33 pm

Good job. Just to add to this. make sure you label the coil pack wires so you know which one goes into which cylinder. I made an expensive mistake and reversed two cylinders. Cost me $2000 in repairs because the misfiring was just sending unburned gas into the cat which caused it to explode and melt away :(

M

User avatar
1M2NV
Posts: 173
Joined: Mon Oct 20, 2008 3:58 pm
Car: 2006 Infiniti M35x Fully Loaded

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby 1M2NV » Sat Jun 19, 2010 4:38 pm

This is a good post. What plugs did you go with?

cruzad3r
Posts: 1314
Joined: Fri Mar 05, 2010 6:34 pm
Car: 2006 M35x fully loaded
Location: CT

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby cruzad3r » Sat Jun 19, 2010 7:09 pm

msvara wrote:Good job. Just to add to this. make sure you label the coil pack wires so you know which one goes into which cylinder. I made an expensive mistake and reversed two cylinders. Cost me $2000 in repairs because the misfiring was just sending unburned gas into the cat which caused it to explode and melt away :(

M
wow really? i've experiencing a lot of misfiring on my german audi but the cat is still in one piece. that's interesting to know about the infiniti misfiring issue.

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sat Jun 19, 2010 10:05 pm

msvara wrote:Good job. Just to add to this. make sure you label the coil pack wires so you know which one goes into which cylinder. I made an expensive mistake and reversed two cylinders. Cost me $2000 in repairs because the misfiring was just sending unburned gas into the cat which caused it to explode and melt away :(

M
Very good point. I typically look at the plug because they usually are 'bent' a certain way (from the wires being one way for a long long time). I came across that issue with the pack nearest to the firewall on the driver side. I wasn't sure which plug went in, but after looking at the plugs and seeing how they were 'leaning' towards a certain pack, it worked out okay.
1M2NV wrote:This is a good post. What plugs did you go with?
I went with the V-Power ones that go for $4.99. I believe they are the copper ones. Last about 30k, I might try platinum next time.

User avatar
svard75
Posts: 1564
Joined: Mon May 11, 2009 3:26 am
Car: 06 M35x
Location: Toronto, Ontario, Canada

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby svard75 » Sun Jun 20, 2010 6:03 am

I thought I could get away with that too, however for some reason two of my wires were supposed to be xcrossed. I forgot this part and when I re-connected it began deiseling like crazy, however that wasn't the worst part. I had no idea why this was happening so I began driving it like this hoping it was an adjustment thing and it would eventually go away. Around 10kms away I began smelling coolant and decided to stop and get towed the rest of the way to the dearlership.

If I ever decide to do this again I'm going to label each connector before I take them off.

Cheers,
M

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sun Jun 20, 2010 8:39 am

Lesson learned I suppose. Sorry to hear about your troubles.

EcstaSPT
Posts: 97
Joined: Wed Jun 03, 2009 9:38 am
Location: Houston

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby EcstaSPT » Fri Jul 30, 2010 10:48 am

Don't forget a dab of anti-seize on the new plug threads.

User avatar
wingFeather
Posts: 1818
Joined: Thu Jul 21, 2005 10:08 am
Car: Current: 05 G35 Coupe. Previous: M35, M35 Sport, cube, J30, s13 sr20det, s13 rb20det, s14 zenki

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby wingFeather » Fri Jul 30, 2010 11:24 am

EcstaSPT wrote:Don't forget a dab of anti-seize on the new plug threads.
That & the correct torque on the wrench when installing. Seems like common sense, but you'd be amazed at how many cars I've worked on where the plug was just hand tight (or so tight it bonded).

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Fri Jul 30, 2010 11:44 am

I do it hand tight + another couple of small turns to be safe. Never had issues and I've been doing my own work since I was 16 (I'm 23).

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Mon Sep 27, 2010 6:17 am

infiniti_lineup wrote:Again, IlyaKol, your posts aren't going unnoticed! Please continue showing your support for NICOclub and posting helpful tutorials, such as this one.

As usual, your original post has been converted into an article which can be found by clicking here.

Thanks for everything! :)
Glad I could help! :)

solo413
Posts: 24
Joined: Sat Feb 05, 2011 8:30 am
Car: 07 m35x
00 maxima

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby solo413 » Sat Feb 05, 2011 8:37 am

thanks for this awesome post! i will b changing the plugs this week!

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sat Feb 05, 2011 10:14 am

No problem. Glad I could help.

User avatar
nolmt50
Posts: 120
Joined: Mon Dec 20, 2010 12:36 am
Car: 2006 m35

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby nolmt50 » Wed Apr 27, 2011 8:06 pm

Anybody have any tricks to get the spark plugs out? After I loosen them up I can get em out.

User avatar
antzrus
Posts: 1819
Joined: Tue Feb 19, 2008 10:20 am
Car: '06 M35x Premium/Obsidian/Bourbon/
Rosewood/XM/Tint/
ClearBra/SteelSkidPlate/Genuine CoCo Mats/Pirelli Cinturato P7+/Nav Hack/M-1
Location: Wenatchee, Washington USA

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby antzrus » Wed Apr 27, 2011 8:16 pm

Image

User avatar
loystock
Moderator
Posts: 2143
Joined: Sun Sep 21, 2003 9:12 pm
Car: 10 Pilot, 97&03 Q45s, 97 I30 and 06 M35 Sports (04 G35 & 99 I30-RIP)
Location: San Jose, CA

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby loystock » Wed Apr 27, 2011 8:31 pm

This is great. This will come handy when I do the plug replacement in July.

User avatar
nolmt50
Posts: 120
Joined: Mon Dec 20, 2010 12:36 am
Car: 2006 m35

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby nolmt50 » Wed Apr 27, 2011 9:06 pm

antzrus wrote:Image
Good Idea!! Blow up my car and use the insurance money on a down payment for an M56!!

Dammit_Dan
Posts: 9
Joined: Fri Jun 04, 2010 6:05 am
Car: 07 M35

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Dammit_Dan » Wed Jul 13, 2011 9:22 pm

nolmt50 wrote:Anybody have any tricks to get the spark plugs out? After I loosen them up I can get em out.
Use the spark plug wire to pull out the plug once it's completely loose.

EniGmA1987
Posts: 2016
Joined: Tue Apr 28, 2009 5:13 am
Car: '06 M35 Sport

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby EniGmA1987 » Sat Jun 08, 2013 12:08 pm

wingFeather wrote:
EcstaSPT wrote:Don't forget a dab of anti-seize on the new plug threads.
That & the correct torque on the wrench when installing. Seems like common sense, but you'd be amazed at how many cars I've worked on where the plug was just hand tight (or so tight it bonded).


SO what is the torque supposed to be then? I will be doing my spark plugs in a week or two and dont want to screw it up. First time I will be doing the spark plugs myself. The dealership wants and outrageous amount of money to do them.

User avatar
CPJ LB
Posts: 1026
Joined: Sat Aug 28, 2010 4:06 pm
Car: 12 G37X Sedan- stealthy modded
14 Altima 2.5
08 Tahoe
06 M35 S (gone)
14 Versa 4dr (gone)
Location: CA 2 CT

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby CPJ LB » Sat Jun 08, 2013 9:44 pm

^you'll be good using anywhere 15-22 ft/lb...

When I changed mine out, it took me approx 1.5 hours

Just make sure you have all the tools prior to starting.. I gapped the spark plugs the night before.

I know there's some videos on YouTube as DIY for spark plug change on the VQ35's

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sun Jun 09, 2013 9:12 am

Every 'mechanic' should have a magnet of some sort in their tool kit. When I loosen the plugs, I take a magnet inside there and it grabs the plug and I pull it out. Same thing for 'dropping' them in there.

mikesd1980
Posts: 57
Joined: Sat Aug 31, 2013 11:00 am
Car: 2007m35x
Location: NE PA

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby mikesd1980 » Fri Oct 04, 2013 7:28 pm

CPJ LB wrote:^you'll be good using anywhere 15-22 ft/lb...

When I changed mine out, it took me approx 1.5 hours

Just make sure you have all the tools prior to starting.. I gapped the spark plugs the night before.

I know there's some videos on YouTube as DIY for spark plug change on the VQ35's
what did you gap them too? I am doing spark plugs soon and want to make sure things go smooth

User avatar
pedsemdoc
Posts: 1013
Joined: Mon Jun 07, 2010 1:45 pm
Car: 2013 M37 Sport - SOLD, Premium/Tech/Sport Journey
Carbon fiber engine cover
GT Spec front tower strut bar
R2C Intakes
Oil catch cans
Custom Start button LEDs
Location: Southlake, Texas

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby pedsemdoc » Sat Oct 05, 2013 3:50 pm

For the Vq35DE, service manual states gap should be 1.1 mm or 0.043 inches

gmoney35s
Posts: 122
Joined: Sun Jan 20, 2013 10:41 am
Car: 2007 M35S

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby gmoney35s » Sun Nov 24, 2013 8:31 am

This is great thanks for the info changing my plugs in a couple of weeks along with various other maintenance items thanks again

calidoso
Posts: 135
Joined: Tue Aug 20, 2013 6:03 pm
Car: 2009 Infiniti M35x: 100% LED

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby calidoso » Sun Dec 01, 2013 1:02 pm

Anyone got the process for a 2009 M35x?

steve_c
Posts: 256
Joined: Fri Jun 25, 2010 7:29 am
Car: 06 M35x
Location: Northeast USA

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby steve_c » Sat Oct 31, 2015 3:32 pm

Good stuff IlyaKol,
I ordered 6 coils & spark plugs from Rock Auto. They had best prices I could find for Hitachi coils, which are supposedly the OEM coils for this application. I have a code PO304, #4 cyl. misfire. I did not drive it too long after the light came on, but I am concerned about the CAT. As SVARD75 pointed out, raw fuel & cats do not get along!
I pulled 2 coils following your guidleines. (#2 coil & PO304 code suspect #4 coil). I put an ohm meter across multiple points of the coils, & did get a reading between the 2 of them that did not match. Maybe I will get lucky with a bad coil! I did not order coil boots, not sure if new coils come with them or not! I will probably change out the 3 plugs & coils on the problem side & re-check for codes before moving on to the other side of the engine. Total for parts & shipping came to $348.00.

User avatar
Ilya
Moderator
Posts: 8729
Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
Location: Albany, NY
Contact:

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby Ilya » Sat Oct 31, 2015 4:40 pm

The other way you could see is just moving the OEM coilpacks around and see if the misfire follows it before installing the new ones (therefor making them non-returnable in many cases). If the misfire follows the coilpack, then you know it's a bad coil and can proceed installing a new one. If it doesn't, then you have some other issue.

kmiles
Posts: 251
Joined: Sun Mar 27, 2011 2:59 pm
Car: 2015 Q70 3.7 AWD - Hermosa Blue
Sold - 2007 M35x

Re: HowTo: Change Spark Plugs (M35 - VQ35DE)

Postby kmiles » Sat Jan 23, 2016 10:59 pm

Ilya - thanks for creating this! I changed my plugs out today and followed your instructions - the car runs great. One plug was near failure, so I'm glad I did it.

I found the perfect tool for this job - GearWrench 80546 5/8-Inch x 6-Inch Swivel Spark Plug Socket- it has a built in magnet and makes changing the plugs so much easier. I bought it with the plugs from Amazon:
- http://www.amazon.com/gp/product/B0014Z ... ge_o08_s00


Return to “Infiniti M35 and M45 Forum”