Hi, everyone.

I have a 04 G35 Coupe. As of today, I've noticed a weird rattle/gurgling sound coming from my car. ONLY happens when I have my car in park. I roll my driver side window down, accelerate and I hear the noise. I've attached a video. The sound is best hearable during the second, third and fourth accelerations. I'm revving the car nothing past 2,500, but of course the higher I rev, the louder/longer the noise is. Just to add, I'm almost 100% sure it doesn't have anything to do with the heat shields because I took them all off.

More information about my car that may help:

Any help will be appreciated. Thanks in advance!

Link to video: http://sendvid.com/49gbsbzh

 

sound to me either a timing chain or rattling cats. You have to listen closer to determine which one is it. Hard to tell in the video.

 

Could be a piece of the honeycomb in one of your cats that has broken loose and is rattling around in there.

 

Thank you, I'm guessing it's the cats. What would you suggest to do you to resolve the issue?

Yeah, I think that's the issue, too. Is it normal for the rattling to only occur when my car is in park though? When I'm driving, I don't hear the rattle.

 

Just thought I'd drop another video. I put my phone under my car to really catch the sound.

http://sendvid.com/7eipmnuh

 

they only way to resolve cats issue is to get new cats. OEM or aftermarket Hi flow cats. Those are usually cheaper than OEM, or get test pipes, but then your car stinks and raspy as hell.

 

Don't listen to this^^Joker lolololol.

Only kidding of course but to me the smell factor of test pipes is an overblown criticism which has been debated over and over on here. Bottom line is it just boils down to what do YOU like. The reality is of you go the tesp pipe route, by all means get the Motordyne ART pipes. Beautiful craftsmanship, guaranteed HP/TQ gains, you're supporting a great guy/forum vendor and best of all glorious sound. People b!tch they're expensive but they're worth every penny and more to me. I sure miss mine!