2003 Infiniti G35/Nissan 350Z VQ35 Ignition Coil and Valve Cover Replacement - Part 1
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- Опубліковано 30 січ 2018
- Update 3 Oct 18: I have replaced the valve cover gaskets with Victor Reinz part #'s 53658 and 53659 for left and right. I have paired these new, better gaskets with the cheap valve covers that I purchased from Amazon. The Amazon covers come with gaskets but the gasket included is poor quality and it began to leak after a few thousand miles. You can view the update video here: • Video
Update 22Sep18: Well I've started to see some oil leaking from the valve covers so if you are in the market for new covers you may want to hold off for a bit until I have time to take mine off again. I plan to investigate to see if it is the cover or the gaskets. I think that the gasket has caused the leak but I am not positive at this point. I hope to have them fixed by next weekend and I will report back with my findings.
This is part 1 of a 2-part series on replacing the ignition coils and valve/rocker cover on a VQ35DE engine. This engine is fitted to a number of Infiniti and Nissan vehicles as I've listed below. How do know if you need to replace your rocker cover gaskets? Easy, there will either be oil leaking around the gasket surface to the outside which will eventually find its way to your driveway or garage floor, or there will be oil pooling in one or more of your spark plug wells. In my case the oil was found in the #2 and #3 spark plug wells. Because the coil pack boots were impregnated with oil for several thousand miles I chose to replace them... all of them. It may not have been needed but they cost around a 100$ for a set of six off Amazon (link below) and I figured it was good insurance. Now I have 4 back-up coil packs in my parts bin.
Parts Needed:
Rocker Cover & Gaskets: a.co/h5LinIc
(this version has the oil filler neck that sits up high as in the G35 and possibly other vehicles with the VQ35 engine - make sure you order the correct part for your application)
Coil Packs: a.co/g9de7l7
RTV Silicone: a.co/8yh00T3
The VQ35DE is fitted to the following vehicles:
North American
2001-2004 Nissan Pathfinder- 240 hp (179 kW)
2013-2016 Nissan Pathfinder- 260 hp (194 kW) to 284 hp (212 kW)
2001-2003 Infiniti QX4- 240 hp (179 kW)
2001-2004 Infiniti I35- 255 hp (190 kW)
2002-present Nissan Altima- 240 hp (179 kW) to 270 hp (201 kW)
2002-present Nissan Maxima- 255 hp (190 kW) to 300 hp (224 kW)
2002-2006 Nissan 350Z- 287 hp (214 kW) to 300 hp (224 kW)
2002-2007 Infiniti G35 Coupe- 280 hp (209 kW) to 298 hp (222 kW)
2002-2006 Infiniti G35 Sedan- 260 hp (194 kW) to 298 hp (222 kW)
2002-2008 Infiniti FX35- 280 hp (209 kW)
2002-present Nissan Murano (Z50)- 240 hp (179 kW) to 265 hp (198 kW)
2003-2016 Nissan Quest- 235 hp (175 kW) to 260 hp (194 kW)
2004-2008 Infiniti M35- 275 hp (205 kW) to 280 hp (209 kW)
2012-2013 Infiniti JX35- 265 hp (198 kW)
2013-2016 Infiniti QX60- 265 hp (198 kW) to 295 hp (220 kW)
JDM and other markets
2000-present Nissan Elgrand 240 PS (180 kW; 240 hp)
2001-2007 Nissan Stagea 272 PS (200 kW; 268 hp) and above
2001-2009 Renault Vel Satis 241 PS (177 kW; 238 hp)
2002-2007 Nissan Skyline (V35) 272 PS (200 kW; 268 hp) and above
2003-present Nissan Teana/Cefiro (350JM-J31) 231 PS (170 kW; 228 hp)
2003-2009 Nissan Presage (231 hp)
2003-present Renault Espace 241 PS (177 kW; 238 hp)
2003-2004 Tatuus Formula V6, Formula Renault V6 Eurocup 370 hp (276 kW)
2004-2007 Nissan Fuga 350 GT 299.99 PS (220.64 kW; 295.89 hp)
2005-2006 Nismo Fairlady Z S-Tune GT 299.99 PS (220.64 kW; 295.89 hp) (VQ35DE S1 engine)
2005-2007 Dallara T05, World Series by Renault 425 PS (313 kW; 419 hp)
2006-present Renault Samsung SM7 217 PS (160 kW; 214 hp) (Neo VQ35)
2008-present Renault Laguna Coupé 241 PS (177 kW; 238 hp)
2008-2011 Dallara T08, World Series by Renault 425 PS (313 kW; 419 hp)
2010-present Renault Latitude 253 PS (186 kW; 250 hp)
2012-present Dallara T12, World Series by Renault 490 PS (360 kW; 480 hp) - Авто та транспорт
I literally just did this work on my pathfinder today gotta wait on a good day to put it back together
Bought this car as a “project” a week ago. Got my work cut out for me. Thanks for this tutorial.
Good luck with your project.
Im getting ready to do this on my FX35. Thanks. Video coming soon.
My pleasure.
Just what I needed to see.
Happy to help.
Please subscribe to get a notification when part 2 (Installation) goes live. I'm currently in the editing process and I'll have it up in a few days. Also there will be a related video that will cover cleaning the intake plenum and installing a PCV breather oil catch can. Stay tuned for that in the days to come.
I bought the valve cover gaskets for my Infiniti g35 for $24
JR, this video is great. How are the covers holding on? No leaks? Also, are the spark plugs seals rubber or hard plastic like the OEM?
They are doing well. I do have a small leak from the front left of the driver's side but I do not attribute it to the cover. I don't think I properly applied the RTV in the corner. Plug seals are much softer than the OEM they replaced.
Nice video, but how did you get the passenger side cover off with the wiring harness in the way?
I'm in the middle of doing this fix on my '06 G35 coupe (due to oil leaks on #4 & #5 plug tubes) and there's nowhere near enough slack/space for me to get the cover off even though I've disconnected all of the harness brackets. Any help would be greatly appreciated.
If I remember correctly I was able to move the harness out of the way enough to get the cover off. I believe the '06 engine has a different intake manifold so the wiring harness routing may be different and you may have to remove it or partly remove it.
Gotcha - Thanks @@JRsGarage
I am just curious why not remove the plenum first before the coil packs to give you more room?
I did the coil packs first to show the viewers that if you want to you can do that job without having to take off the plenum. But if you know you are going to also replace the valve covers, then removing the plenum first is definitely easier.
Great video! How do you remove the very back attachment wiring that attaches to the valve gasket driver side?
All of the electrical connections are pretty much the same. Press down on a tab as you pull apart.
I’ll try bent nose plier this time. Thank you!
Do you mind linking the site to where you got those printouts?
I hesitate to link directly to the manual due to copyright infringement but if you type "infiniti g35 service manual" into google, the 3rd link that shows up for me is from "cardiagn.com" and that will take you to the pdf documents.
JR's Garage thanks so much!
hi happy new year the video very details, I like that. I replace my spark plugs on my g5 2005 sedan. I notice oil on the spark plugs on the passenger side. I want to do what you doing right now. do you have a manual, and can you list all the tools used on the video.yes i will be doing myself
I can't remember using any special tools for the job just a normal socket set, screw drivers and pliers.
Nice Vid
Thanks.
Engine cover for the infinity mfx 35,was changed due to oiling engine, after putting new one ,and oil still coming out from the plugs,, and the new obtain there is no spring on seal , what is the problem , please enlightened me
I'm not sure what spring on the seal you are referring to. The spark plug holes should have rubber seals built into the new valve cover. Either it was installed incorrectly, it is defective or the surface was not cleaned properly prior to installing the new unit.
I removed the 10 bolts and my valve cover is stuck. It seems everything is disconnected. Why is it stuck. Help
It could be that there was too much RTV used to seal it last time it was off or from the factory. Also the gaskets around the spark plug Wells may be tight. Lift straight up.
Hwo do I know if I need to replace the entire valve cover or just the gasket? I had oil inside the spark plug wells on like 3 or 4 out of 6 wells
If you have oil leaking into any of the spark plug wells you need to change the entire valve cover on that side. The gaskets for the spark plug wells are built into the cover. If you have oil only leaking on the exterior of the engine than you can get away with just changing out the edge gasket.
What do you think the job at a mechanic would cost? In case I am not willing to spend a day or probably even 2 on the job myself?
I'm not sure but I would assume they would charge 4-5hrs for the job at $50-70 per hour for labor could cost you from $200 - $350. then you have to add the parts cost from the dealer which is much more than you can find on Amazon. But that's just a guess.
I called my local mechanic shop and they quoted me ish 1.000 euros incl part and labor. That is 300 euros per Valve cover with the gasket of course each, so 600 for parts and another 350-400 for labor. I am not replacing such a valuable and important part with some aftermarket copy, so for me it is worth paying 350 euros for someone else to do it than standing there for 1-2 days getting extremely frustrated and might break something
E-Bay valve covers $60 bucks, They work fine.
Hi great video mate i wonder if you can help me please i am looking for valve covers ang gaskets for a nissan skyline 2001 engine model VQ30DD I HAVE TRIED LOOKING FOR THE PARTS BUT NOT HAVING ANY LUCK. THE CAR IS IN THE UK AND IT WAS IMPORTED FROM JAPAN 6 YEARS AGO. THANKS BRIAN
You can find the gaskets and covers here: nissan.epc-data.com/skyline/hv35/6820-vq30dd/engine/111/ Looks like they may be quite expensive. You may want to go to the local Nissan dealer and see if they can get them for a better price. Also, there may be other Nissan engines that use the same valve covers that were sold in the UK, such as the VG30DE or VQ30DE. You can also try: www.nipponautospares.com/
rhdjapan has a option where if you have the part number, they will order parts from a dealer in japan and export it to you
Bro how did you take off the hose that connects the two valve covers located in the front ?
I cant take it off!!!!!
Use some pliers to grab the rubber right where it overlaps the tube going into the valve cover. Don't squeeze too hard or you'll break it. Now twist the pliers so that you break the seal that's been formed by the rubber hose. After the seal is broken you should be able to pry it off with a flat head screwdriver.
sliding a pick up the hose should also break the seal
Hose was old i got a new one anyway
On one side it broke loose pretty good but the one other side it broke
No big deal
How did those cheap coil packs work out I priced them at auto sites they r like 60$ each I have seen them on Amazon for 100$ for all of them but I am weary of to good of a deal
No issue with them so far.
The cheap coil packs are probibly a damn near replica internally and externally probibly made exactly the same some companys will cut corners though with the production with lesser or less pure components
Why did you replace the whole cover ? Why not just the gasket ? I forsure have a leak in my cylinder 6 so need new gaskets forsure.
The spark plug well gaskets are built into the cover.
How many miles does that engine have on it?
+Wayne Avison Just about 115k. I know, very low for a '03.
Hello. Can someone please confirm if the VQ25DE uses the same size rocker valve covers? Thank you.
I doubt it. Put your year make and model into rockauto.com and it should show you the compatible valve covers.
@JRsGarage Thank you very much.
Is this the same motor as in a 2003 nissan pathfinder ?? VQ35de?
Yes, this is the VQ35DE, but the valve covers may be different due to the oil filler neck.
What intake and tb is that?
TB is stock. The intake tube is similar to this: www.ebay.com/itm/Black-Air-Intake-Hose-Pipe-Kit-Filter-for-Nissan-350Z-3-5L-V6-2003-2006/402561021147?fits=Model%3A350Z&hash=item5dba81b4db:g:4OgAAOSw89BfaFiY
but mine didn't come with the filter and other bits, just the tube. I connected it between the MAF and TB to remove the oddly shaped stock one. Added a bit of intake noise but I like it. I covered it with thermal tape and there is a K&N filter in the stock air box.
Ty for this video do u own this car?
Yes, mine since new.
I trust that your knowledge is viable, so there’s a G35 Coupe for sale locally for 3250. The only thing wrong with the car is that it needs a new valve cover gasket and a new AC compressor. The owner already has a new compressor and just hasn’t installed it. Given all of these factors, I need a reliable car that will make a 512 miles trip about 4 times a year (#College Lyfe). Is this a good investment?
Edit: the car has 137k miles
I'd say that's a pretty good price and fairly low to normal mileage depending on the year (03-05). My 03 has about 15k less miles and I would trust it to drive cross country and back. Any service records available? Take it to a garage and spend ~50 bucks to get a pre-purchase inspection. If the owner won't let you do that he's probably hiding something.
Hmm, 500 bucks for valve covers or 950 for a Japanese low mileage replacement. Nissan boy I tell you I love to hate working on them.....
That's why I went with the cheap covers and quality gaskets. Low price and working out great.
No. valve covers are cheap. Gaskets are even cheaper. Got mine for 20. Btw G35 aren't 900 bucks. That's the price of wheels and tires or a used engine.