Hi, I'm wondering if this is normal for G37s. When you're in neutral and the clutch is completely disengaged (clutch pedal not pressed), there is noise besides what the engine omits and when you press the clutch it goes away.
Try it and report back. Turn off your radios it is very unnoticeable. Is it normal? I think it's the throw bearing noise. It's also in most honda's as I'm from honda background and I hear it also in Honda's.

 

Probably just the chatter from the flywheel. My old 05 G35 did the same thing. Throw out bearing will be much more obvious then a light chatter.

 

ya. mine does the same thing. from what i've read it's normal. i've heard it referred to as the "marble spinning in a can" sound. lol

 

Mine does the same. It's most apparent when I'm parked next to another car with the windows down.
I actually had them look at it when I took it in for some warranty issue, and the tech said it's normal. He brought me under the car on the rack to make sure he was referring to the same noise I was hearing. Nissans just have noisy clutches.

 

Normal. In mine you can hear the throwout bearing and flywheel chatter, it suuuucks.

 

That's what I was going to do too since my warranty is going to run out 2017. But they will probably say it's normal.

 

You have it backwards. The clutch is actually fully disengaged when the pedal is to the floor, otherwise you wouldn't be able to shift gears. When the pedal is not depressed, the clutch is fully engaged.

The noise you're hearing is normal, as mentioned above, throwout bearing and or trans noise. If you get a single mass flywheel, things get even louder.

 

Happens to me when I park and put it in neutral for a minute. Sounds like a bearing spinning when i take the clutch out and goes away when I put it back in. I think it's normal

 

I've had a lightweight flywheel . and its so loud. and when you drive and from 1k to 2700k rpm. it sounds like the whole exhaust it rattling. it's horrible lol

 

Yup..throwout bearing. Mine does this too...its normal after a while with any manual car

 

I am not sure how to create a link to my previous post, so look at the post titled "Dealer Replaced Manual Transmission Under Warranty". I wrote:

Dealer Replaced Manual Transmission Under Warranty
With all of the dealer problems, I wanted to share a good dealer experience. When I bought my 2008 G37s 6MT coupe on 2/1/2013 from an out of town dealer, I took it to Plaza Infiniti here in St. Louis as I had a little clutch grinding noise. They said if the grinding noise wasn't that bad, it would be better to bring my car back just before the drive-train warranty expires. They looked up my in-service date and gave me a print-out with all of my warrantee expiration dates - my drivetrain warrantee was to expire on 3/31/2014. I called a week before expiration to schedule an appointment to check out all drivetrain warrantee issues and they quoted $160, or they said if I had a fluid change, they would do this as a courtesy. If they were going to save me $160, I had them change my coolant, my differential fluid and brake fluid - probably paid $80 more than non-dealer. At first the service manager came out and told me there was nothing wrong with my car, but after another 10 minutes, he reappeared and said I needed a new transmission and it was covered under warrantee. I asked how much this would cost if I had to pay for it - just shy of $4,000. A few days later I have a new transmission and no more grinding - very pleased and would recommend this dealer.

Lessons learned:
#1: The service manager said that I got the transmission replaced because I made him specifically write on the work order that there was a grinding noise when in neutral and the clutch pedal out, no grinding when the clutch pedal was depressed. The mechanic had to specifically diagnose this problem. My work order listed checking out any drivetrain warrantee issues before checking out the grinding so I assume that is why the service manager came to me twice.
#2: In case the transmission would not be replaced, I had video recorded the noise with the clutch pedal in and out in the dealers parking lot just before servicing. If my transmission failed say... within a year, I would have taken my work order (stating my transmission problem) and my video back to the dealer for further discussions.

 

Can you upload this video to youtube (if you haven't already)? I'm curious if your grinding was something more severe than what we are experiencing.

 

very nice, post video of noise please. Maybe some of us can try our luck.

 

i had a very similar issue as well and also had my tranny replaced under warranty.

 

pretty normal.