jasec

Hi all,

I have a stock 2013 g37x.
When the car accelerate hard(full throttle), when engine RPM is over 6000 rev/min right before shifting(especially for 2nd and 3rd gears), I can hear high pitched and frequency noise. Unfortunately, I am not able to locate the noise. I have been using premium car and taking good care of my car. Please help diagnose or let me know if you have similar issue. Thank you!

Please visit below link for video.
https://www.youtube.com/watch?v=F6vW...ature=youtu.be

dwb993

Can't see the video, as it is marked Private.

I noticed a similar noise after I installed my R2C intakes. It seems to have gotten better than it was. I also had to install the rubber molding stuff between the cowl plastics and the windshield, which took out a whole lot more noise I was having.

Because the noise only happens at high RPMs under load, it is much more difficult to diagnose.

Ricio1991

Same here I have the same noise! I'm in for answers! I want to get it diagnosed soon

jasec

Thanks for your reply!
Sorry, I just turned the video privacy to open
Is this the noise you are hearing?

Ricio1991

Look up faint metallic noise on the search button, one member in 2013 said something to do with the wheel well not being properly secured

dwb993

That sounds a lot like what I have.

Ricio1991, now that you mention that, the noise got better after I did my headlight work, so your theory makes sense!

Ricio1991

I'm definitely going to have to get mine checked and make sure I get all the plugs for my wheel well! I'm glad I seen this post because know i may have a solution to my issue hopefully

jasec

You did your headlight work and reduce the noise?
What exactly did you do? Could you elaborate? thanks.

dwb993

^I pulled the covers off of the wheel well to get to the lights. It gave me more room to solder and better access overall. Details are in my Build thread in my sig.

I did not put 2+2 together until he mentioned the liners in the wheel well.

jasec

Thank you!

Dealer got my wheel liner(you mean the one covering up the break disk? correct?) fastened and the high pitched noise is still there. This high pitch noise only happens when engine is at high RPM right before shifting, regardless of what road surface condition is.

dwb993

No...I'm talking about the plastic fender liner in wheel well.

jasec

Ok. I guess the noise I observe is coming from different source than yours. But yeah, glad you found some potential root cause...

Mattlorentzoe

iTrader: (4)

I had same noise with k and n intake. Swapped that for longtube intake. Never heard that noise again.

slartibartfast

iTrader: (7)

The hamsters are complaining about the workload.

jasec

This is what the Infiniti dealership told me:

" I talked to the technician and he said this is the same issue that we looked at with the Infiniti rep. And he said that is normal operation and nothing to do to fix this. I thought you were talking about a different noise. This noise will happen when at that high of RPMs because the engine isn’t designed to maintain that fast of revolutions."

And they have another 2013 G37 that does the same thing.

I guess this noise is normal.