That would implicate the undertray since you have to remove and replace it to do an oil change. I'd think a loose undertray would react more to speed rather than rpm though.:confused:

Can you look at the video and see if this is still similar to your previous issue?

This is exactly why I've done 100% of my own maintenance from the day I got the car with 39k on the odometer; I don't trust dealerships to treat my car like I'd treat my car. So far I've done oil/filter changes, a new set of spark plugs, cabin filter ('09 didn't come with one), new battery, transmission fluid, differential fluid, and mounted/balanced a new set of 285/35/19 Potenza Pole Positions for the rear (a buddy has the equipment). I'll replace brake pads and fluid once I decide what I want... I've got about 58k on it now, 2 years this January.

The only thing I didn't do myself was the alignment (rears were at -2.2 camber for some reason:icon14:).

Exactly. When you ask a dealer to do fluid changes, brakes, etc, you're going to have their most inexperienced tech do those jobs. You keep your good techs for the more complicated stuff. The oil change monkey is the lowest rung on the ladder. DIY or GOOD local independent shop. Unless it's under warranty, F the dealer.

Buying tools is cheaper than paying labor.

Correct. But the undertray was tight beforehand. The sound was coming above the undertray.

Same exact sound. It's definitely in relation with RPM and not speed. It hasn't hurt my car at all that I've seen. So don't worry to much about it. It is an annoying sound though. If mine comes back when I pull mine out of storage in the spring, i'll start tearing stuff apart.

Yeah I just checked the undertray and it seems nice and tight. Nothing looks loose. And when I rev up to the limit, 5K, no noise.
Since you said it went away on its own, ima stop stressing out with the dealer and just let it be for now.
I guess the only sure way to know what it is, is for something to actually/fully break.

Yea. Don't worry to much about it. About 3-4 months after I drove the car is when it went away. I did a few hard launches and shift changes during those times.

Actually, you should take the undertray off and have a look before you assume everything is ok. Just because it doesn't happen when the vehicle is stationary and revving doesn't mean there isn't something contacting when the car is moving and at high rpm.

Yeah this would sketch me out hard. ^ deff make sure nothing is making contacts or loose, jack it up if you can and check everything.

Mech could have left something in the engine bay???

:iagree:

i don't trust dealerships...

the way i look at it is look at the shop. look what's sitting in the shop. if cars are more expensive than yours sitting in the shop then there is a good chance they will treat your car well.

if it's your standard nissan/toyota dealership i can guarantee they don't see sports cars all that often and the techs will be more inclined to go for a 'loop'.

oh and they'll make up bs excuses as to why you need to pay them more of your hard earned cash.

there was a guy posting earlier this year saying how he heard the techs revving his engine in the shop. i'd be pissed off if they rev'd my engine significantly for no damn reason.

hope you can figure out wtf is causing it. i agree with chuck... either do it yourself or ask another mechanic at a non-dealership look at your car.

From my experience Nissan service monkeys aren't worth a ****. They can't diagnose ****. All they can do is follow the red bouncing ball on their computer screen. I hate when I go to the 'specialist' for repair help and I know more than all the mofos there.

Looks like you were right... After just about a week of my "normal" driving, it seems that the noise has just gone away.
I feel like there might be something loose behind the dash or something. Oh well. No noise anymore.