New Exhaust "DING"
 

3 weeks ago I had the Nismo R-Tune exhaust installed, and I know that metal expands when hot; however, there is a loud "ding" that happens about every 15-20 seconds after the exhaust is hot. The ding can only be heard while at idle or when stopped, not while driving.

I'm just wondering if other aftermarket CBE units do the same thing, and also if the noise eventually goes away or just fades to a not-as-noticeable level after the system is more seasoned.

I've had the exhaust inspected by the shop that did the install and everything is copacetic, but it's a tad annoying when your car sounds like a ticking bomb in the parking lot of Lowe's.

Can't say that mine makes any noises other than once the car is shut off and the metal starts to cool back down.

Yeah, I don't get the normal little cooling off ticks... just the loud ding for several minutes.

Is it making the same ding when cooling down? If so, I'd start snugging up flange bolts, clamps, etc.

It is making the same sound on cool down. All bolts/hardware/gaskets are good--thank you for the suggestion.

I listened to it for several minutes when I got home today and it sounds like something in one of the muffler cans. I called the shop that installed it and they're going to look at it Monday morning. I'll report back with the findings.

Figured I'd post an update even though there's not much to report. The shop spent 3 hours trying to locate the "ding" and isolated it to the intermediate pipe. They reinforced every single weld on the damn pipe and also on the axle-backs. Nothing changed.

My next stop to is contact Z1 and see what they say about a return/refund/exhange.

New Exhaust "DING"
 

Personally what I would do now is the opposite. I’d slightly loosen up all the flange bolts and see if that helps. Drive it around a while and if the sound is no longer there, then I’d snug everything up while the exhaust is still hot.


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I'll give that a shot--at this point, it can't hurt. Thanks!

I think we're all glancing over the fact you got the R-tune exhaust. You like other than this? :ugh2:

Still have stock cats? Ive seen oem cats make that sound because of the expanding and contracting within the fiberglass lined heat shields.

Yes, other than this issue, I am very happy with the exhaust. The note is aggressive under throttle but peaceful in the cabin. You can probably get the same results with the Invidia Gemini for a few hundred less though. I sincerely doubt Nissan actually built this exhaust, rather they sourced it out and had them stamp "Nismo" and "Z34" everywhere.

The only thing to note visually is that the tips are small and came nowhere close to filling up the Nismo ('15+) cutouts.

No. I have AAM resonated HFCs and I had them installed for about 2 months prior to installing the R-Tune system without any issues.

***update***
 

The "ding" turned out to be a blown weld inside one of the resonators. The shop still had my stock midpipe so they just cut and pasted the old into the new and the annoyance, along with everyone's frustration, is gone.

Thanks for all the feedback and suggestions, you guys rock.

Glad you figured it out, no idea how you found it.

Pretty lame a Nismo part has quality issues.

We just kept listening and finally isolated the issue. There are only so many components that can fail and the one that had the most pieces/parts is the most likely culprit. It was a giant PITA getting there though.

You'd think Nissan would be all over QA with something getting their top-of-the-line branding, but crap happens and there's always a solution.

Any possibility of a video of this exhaust? I'm really interested in something a bit more than stock but not obnoxious like motordyne or berk. So far I was considering

Leaving it stock
OEM Nismo
Nismo S tune
Tanabe Racing Medallion
Nismo R tune

If R tune has a bit more sound than S or OEM Nismo but still doesn't drone on the highway I'd go for it.

Look into the Borla as well. It's a more aggressive OEM sound.

Would also like to see a video of the R tune.

I've had the Berk HFC and CBE and it is far from obnoxious. Almost can't hear it unless you go WOT. No drone, and the fit and finish was awesome.

You can hear it in a video that I took at the track last month...

https://www.youtube.com/watch?v=Wnk5ktFHUsU&t=407s

The R-Tune is definitely high-flowing and sounds nothing like the stock exhaust. It is aggressive under throttle, yet there is absolutely no cabin drone. Aside from the resonator issue, which was most likely an anomaly, I am very happy with the system overall. The muffler cans tuck up nicely under the rear bumper and aren't subject to scraping.

Oh... I should mention this: the tips that come with the R-Tune exhaust are small diameter--they will NOT fill up the cut-outs on a 2015+ Nismo. I had my AAM titanium short tail tips put on instead of the stock tips.


EDIT: I'll work on getting video and pics this weekend for you all.

Sorry for drudging up a year old thread, but did you just get the one faulty resonator replaced or both for even flow? I'm experiencing the exact same issues with a newly installed r-tune cbe.

I just installed the R Tune as well over the weekend. I noticed a sort of "ding" noise a couple times on the first drive on the highway, I assume the exhaust wasn't fully heated up yet. Since that first time I don't recall noticing the noise while driving. Do we think this could possibly be part of break-in?

I will hear creak or ding noises after I've turned the car off and it's cooling down, but as we know metal contracts and expands with heat, it being a multi-piece system it's bound to make noise.

Where did you guys buy your R Tunes from? I got mine from CZP and they said they hadn't heard of this issue happening, but I did forward them this thread to look into it just in case. I am certainly keeping my ear out in case the noise starts to happen more frequently on the road.

Mine was purchased from Dynosty. After a few weeks I'm use to the noise but it'll still get pretty damn annoying near a wall. I'll post an update if it ever goes away (hoping a few WOT runs might blow something out).

Just to follow up, the noise on mine has actually gotten more persistent. I've contacted CZP about it and sent them a video. They agree it isn't normal and have sent a report to Nismo. I'm going to try to return mine, I've already placed an order for a Fast Intentions CBE with 18" resonators.

It was just one resonator as far as we could isolate; however, I had them both cut out and just replaced with the stock ones. I'm sorry that you're experiencing this, as it's very frustrating. It seems to be a QC issue on the manufacturing end.

I thought it was from the expanding/contracting of the heated exhaust as well, but it wasn't (well, not in the sense of normal operation--obviously it was expanding/contracting within a faulty resonator). It was a very loud and noticeable "DING" that happened about every 45 seconds and lasted for several minutes after I shut the car off. It was definitely coming from one of the resonators. We spent a long time listening and isolating. After the resonator change, I've not had any more issues and I LOVE this exhaust.

I bought my exhaust from Z1.

Following up for anyone else experiencing this issue. After a year with them installed and over 15k miles the noise isn't so bad. Only ever hear it when it's hot out, and the Z is ran for a while. It definitely calmed down and 90% of the time my windows are down and I'm in a lane next to a wall so I would hear the echo pretty well. So there is hope without replacing the resonators.