Hey guys, bought my 2011 G37 S Sedan back in January, and ever since about 7,500 miles (has 12k now), my car sounds like a diesel engine after I drive it for a bit.

Basically, when I turn on my car and let it idle to normal temps, it's fine. Drive it to work, before getting out my car, it sounds so loud, until I depress my clutch, and it goes away.

Furthermore, when I shut off my car, unless I have my clutch depressed, it makes the most horrific clunking noise ever. I've shown this to the service techs at the dealership, and they agreed it COULD BE the TOB or pilot bearing, but upon inspection, they say the car is fine.

Of course, the service manager says differently explaining that because of the dual-mass flywheel, rattling is normal. Yet, the dual-mass flywheel was MADE to REDUCE friction and rattling....so now im confused as to what it might be.

Any help whatsoever would be appreciated. And yes, I checked around the forums a bit but I couldn't find too much help...perhaps I missed a link.

Thanks in advance!

 

ive only had experience with wheel bearing issues:
if you notice, when reaching between 40-60mph, a pulsating constant hum that increases with speed then you have bad bearings (you can also check for play with the wheels).
thats all i can help you with, not sure if my info is relevant but hope it helps.

 

Normal noise. I had this concern as well.

 

I kind of grew into the noise and whatnot but I just found it very strange that it started to happen about half a year into having the car, and not earlier.

 

Sounds like a can of marbles?

 

They all do this. It's not the flywheel, my OEM one has been swapped out for a lightweight billet steel flywheel and the throw out bearing was replaced along with the clutch. It still makes the noise as loud as ever.

 

Can of marbles, or as I put it rattling chains, was in fact my brake shields. Had that fixed, but they also cut my rotors =[. Lucky for me, they warped within 2k miles, so I got new brakes.

 

The can of marbles like noise I had in my camaro too. Put the clutch to the floor, noise goes away. Let clutch out, noise comes back. Was there since I got the car too. No clutch issues 80K miles later either.