So today I was driving and I accidentally drove over a small curb parking thing, and when I drove away my car started making this sound that it wasn't making before .. The way I can describe it is , it sounds like when you put cards on the tire of a bicycle.. Like shuffling cards.. It's weird. And it does it when I drive away. Gets louder. My gf stood outside the car and tried to hear it when I drove by her but she said she can barely hear it.. I can hear it a lot when I drive next the someone like the sound ricochets ...

I read on a forum somewhere that it might be the water pump going bad.
Or it can be that I have a nail or screw in my tire. Which I do have big nail on my front driver side one but my tire hasn't gotten flat. And it's been there since before the noise started today.

Idk what else it might be, maybe someone here has had the same issue?

Can any of you 350z brothers help me out and give me some opinions?

 

You knocked a plastic shield loose, look under your car

 

Yeah it looks like this part that holds the radiator still is all flimsy now..

 

Hey bro, update, yeah I have some plastic stuff loose. But I turned on my car and I revd it up, the noise is coming from my Y pipe area. There's this tube that has a mesh type of material and it looks all ripped up. I think it's called "flex pipe" do you think maybe that's letting air out through a leak or something and it's causing the noise? I can hear it from there. Sounds like "bRROOM" ..

 

Maybe your engine is loss? Lol.. It's probably just plastic that's vibrating. Just get around hitting it palm and see if youcan locate it.

 

The flex joint on your Y pipe is there to allow for some movement of the exhaust system. You've damaged it going over the obstruction and you now have an exhaust leak that's only going to get worse. Take it to a reputable exhaust shop to get an estimate on cutting it out and getting the flex joint replaced.

BTW- what may have seemed like a small accident most likely resulted in significant damage to the underside of your Z. The Z is a true sportscar, not an SUV with high ground clearance. Get ready to repair not only the exhaust, but most likely parts in front of the radiator support as well.