The clutch on my 2008 G37S is slipping and I'm looking into replacing the whole kit but not sure where to start as far as parts required for the whole job. Only looking to replace the original clutch with OEM parts

 

Well if you want oem parts it will cost you a fortune. The parts you will need to replace are flywheel, clutch, concentric slave cylinder, master cylinder, and pilot bushing. You can get a very solid kit from zspeed for alot cheaper with everything.

Like this one: https://zspeed.com/product/zspeed-st...elete-package/

I have the stage 2 version and it is quite amazing!

 

Additionally to Nick's comment you can also resurface the flywheel as well and dont forget the transmission/clutch fuild. That covers everything

 

well as a certified Nissan/Infiniti service advisor I can tell you Nissan parent to Infiniti is very thorough when it comes to clutch replacement I usually sell the complete unit ( new flywheel , disc and pressure plate while your their they will also recommend replacing the slave cylinder and flushing the clutch master cylinder to prevent and heat related problems down the road . If you or they see anything that looks worn or at the end of its usable life then their is no time like the present . Also something to consider but not required — exchange the fluid in your trans unit . I use a redline synthetic in mine and once warmed up it really helps with that profound Nissan / Infiniti clunkiness while shifting quickly between gears

 

Can you resurface it? I had mine done back in February and it's a dual mass flywheel so I didn't think you can.


I know you wanted OEM parts but I would recommend replacing the slave cylinder with an aftermarket one that won't fail on you. I replaced mine with the JIT Heavy Duty CSC because the OEM failed on my car at around 45k miles which is kind of ridiculous. Slightly more expensive but the peace of mind was worth it for me. I replaced the master cylinder with the one from the 370z so it wouldn't have the annoying damper on it for next time it might need replaced.

 

The OEM flywheel CAN NOT be resurfaced as it is a dual mass flywheel.

 

Invest and get the CMAK from ZSpeed to replace the factory CSC, trust me. I've yet to see these fail and have seen other upgraded replacement options fail.

 

I can tell you it depends on how far you wanna go in this job, because you can replace the clutch and you car will be derivable again, but there are several other "preventative maintenance" tasks you should consider while replacing this clutch.

Absolutely Required (Bare minimum to complete this job)

1. Brand New OEM Infiniti flywheel (You CANNOT resurface a dual mass flywheel, which the G37 has. The flywheel WILL fail if you do this.) Part Number is 12310-EY00A
2. Pressure Plate (w/ Clutch Disc) Assembly. Part Number is 30205-JK40C
3. Concentric Slave Cylinder. Part number is 306A1-JK40E
4. Pilot Bearing. Part Number is 32202-B950A

Have plenty of blue loctite
Have a transmission Jack
6+ Ton jack stands (preferably 12 ton)
Impact wrench and Torque Wrench.
Paint Markers (For recollection of certain parts/steps)

You drop the transmission, remove the pressure plate, the pilot bearing, the flywheel and the old concentric slave cylinder from the transmission. Reinstall everything in reverse order with new parts. Bleed the system and that's pretty much it.

I just ordered all my parts to do this job and will be doing it this sometime this month when I have the time, but as far as that, I'll be doing more than just replacing the aforementioned above.

5. Replacing the transmission cover seal within the bell housing behind the concentric slave cylinder (Seals eventually fail, and you don't wan't to replace this clutch only 8 months later and find a transmission oil leak) It's quick and easy.
6. Replace the Rear Main Seal, even if there is no leak present, again for the same reason. The rear main seal surrounds the crankshaft, simply remove the old one and a place a new seal around it.
7. Replace the Clutch Master Cylinder. The transmission doesn't need to be taken off to do this, but you should replace it if you're going to be putting a brand new strong (or stronger) pressure plate on. New pressure plate + used/worn master cylinder = potential failure.
8. Replace Crankshaft Position Sensor, if not already done. our cars are over 10 years old with the same sensors from factory, with the transmission removed, replacing this sensor is 1,000,000x easier.
9. Replace Air-to-fuel ratio sensors, If not already done. With the transmission removed, this is also very quick and easy as opposed to doing this from the engine bay which is very difficult.
10. Replace Flywheel and Pressure Plate bolts with new ones, not really necessary just optional.
11. Replace starter. Only if you're having issues with the current one (like I am)
12.Have an aftermarket shift **** ready or purchase a new OEM shift **** from Infiniti as there is a very high chance you'll severely damage the current one in your car when you have to remove it.

5 through 12 aren't required, just something to think about and consider, but for the bare minimum, just the first 4 steps will fix your slipping clutch.

Easier said than done, but good luck.

 

How's that JIT Heavy Duty CSC working for you? I was thinking about buying the Zspeed one, but the hardware looks complicated to install.

 

Why are you replacing it all with OEM parts again? That's ungodly expensive. There are better aftermarket parts out there that can easily last 100-150k miles as well for 1/8th the price.