Anyone ever heard this sound? '19 1SS Auto NPP Exhaust

Andrewvandee · 03-31-2021, 11:26 AM

Hey everyone, first post on the forums. Anyone ever heard this sound coming from seemingly the exhaust on gen 6 camaro's?

Specs:
2019 Camaro 1SS 10 Speed, NPP Exhaust

Here is the video in my Google Drive with the noise. It happens randomly, when driving at any speed, braking, or as shown, even parked and idling.

https://drive.google.com/file/d/1_6b...ew?usp=sharing

She's with the dealer now, still very much in warranty (hopefully dealer says the same). I will report back with what they find!

mrgoodbytes · 03-31-2021, 12:00 PM

That sounds horrible! But it does sound like it is coming from the NPP exhaust actuators. Probably a simple and quick fix.

Andrewvandee · 03-31-2021, 12:11 PM

Quote:

Originally Posted by mrgoodbytes

That sounds horrible! But it does sound like it is coming from the NPP exhaust actuators. Probably a simple and quick fix.

Exactly. Started randomly as well, no track time, no sudden hard braking, etc, etc.. We shall see!

ember1205 · 03-31-2021, 12:36 PM

Sounds like something is loose or broken. Definitely -not- what you want to hear!

SSDan · 03-31-2021, 12:52 PM

That may be the worst sound I've ever heard coming from underneath a car. Was that with the engine running?

Good luck. I would think the service rep could find that.

Andrewvandee · 03-31-2021, 01:01 PM

Quote:

Originally Posted by SSDan

That may be the worst sound I've ever heard coming from underneath a car. Was that with the engine running?

Good luck. I would think the service rep could find that.

Yes, engine running in Stealth exhaust mode. Noise definitely was more likely to happen in stealth mode, so my theory is the added pressure of the valves being closed is causing something to rattle internally. Again, no issues at all with power or any other system on the car. No lights on the dash, no codes, etc..

nancygrl · 03-31-2021, 01:59 PM

No Bueno. Should be no problem taking care of it under warranty.

Scargoes · 03-31-2021, 02:56 PM

Maybe a baffle in the muffler or maybe the valve actuator has stripped gears.

Whatever it is, it should be covered under warranty.

Turkish01 · 03-31-2021, 03:47 PM

That is the exact same noise I was talking about in the other npp rattle thread. It happened to me about 5k miles ago. Dealer replaced one of the actuators but it just came back again. Really frustrating.

ember1205 · 03-31-2021, 03:56 PM

I have a couple of working actuators that I'd be willing to sell if anyone needs them....

Andrewvandee · 03-31-2021, 06:21 PM

Dealer confirmed it was actuators. On BO so I picked up the car, and am waiting their callback once they receive the actuators and new seals. All under warranty

grampa_ss · 03-31-2021, 06:33 PM

put in in sport/track mode and pull fuse 51 (well, it's #51 for my 2016 anyways). That'll prevent them from trying to close.

Andrewvandee · 03-31-2021, 07:03 PM

Quote:

Originally Posted by grampa_ss

put in in sport/track mode and pull fuse 51 (well, it's #51 for my 2016 anyways). That'll prevent them from trying to close.

Thanks! I was going to do this for the time being, and I'll confirm that the fuse is the same on the '19 before I start pulling.. LOL

Turkish01 · 04-18-2021, 01:59 PM

Quote:

Originally Posted by grampa_ss

put in in sport/track mode and pull fuse 51 (well, it's #51 for my 2016 anyways). That'll prevent them from trying to close.

Pulling the fuse won’t fix that issue. I tried and it still makes the noise. The actuators have to be replaced

03-31-2021, 11:26 AM	#1
Andrewvandee Drives: 2019 Chevrolet Camaro 1SS Join Date: Mar 2021 Location: Florida Posts: 5	Anyone ever heard this sound? '19 1SS Auto NPP Exhaust Hey everyone, first post on the forums. Anyone ever heard this sound coming from seemingly the exhaust on gen 6 camaro's? Specs: 2019 Camaro 1SS 10 Speed, NPP Exhaust Here is the video in my Google Drive with the noise. It happens randomly, when driving at any speed, braking, or as shown, even parked and idling. https://drive.google.com/file/d/1_6b...ew?usp=sharing She's with the dealer now, still very much in warranty (hopefully dealer says the same). I will report back with what they find!

03-31-2021, 02:56 PM	#8
Scargoes Drives: 2018 Hyper Blue 2SS 1LE Join Date: Aug 2018 Location: Dessert Posts: 486	Maybe a baffle in the muffler or maybe the valve actuator has stripped gears. Whatever it is, it should be covered under warranty. __________________ 2018 Hyper Blue Metallic 2SS 1LE with Nav, PDR, and track alignment 1:34.20 Willow Springs Big Track

03-31-2021, 06:33 PM	#12
grampa_ss Drives: 2016 Camaro 2SS Join Date: Apr 2017 Location: Stansbury Park, Utah Posts: 1,092	put in in sport/track mode and pull fuse 51 (well, it's #51 for my 2016 anyways). That'll prevent them from trying to close. __________________ 2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000 New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.

03-31-2021, 12:00 PM	#2
mrgoodbytes Drives: '18 2SS/EU (+Recaros) M6 Red Hot Join Date: Nov 2018 Location: Sweden Posts: 260	That sounds horrible! But it does sound like it is coming from the NPP exhaust actuators. Probably a simple and quick fix.

03-31-2021, 12:36 PM	#4
ember1205 Hot Camaro Drives: '20 2SS Convertible 6MT Join Date: May 2020 Location: CT Posts: 3,534	Sounds like something is loose or broken. Definitely -not- what you want to hear!

03-31-2021, 12:52 PM	#5
SSDan Drives: 2016 1SS 6MT NPP Join Date: Feb 2010 Location: Lake Murray, SC Posts: 2,245 View My Garage	That may be the worst sound I've ever heard coming from underneath a car. Was that with the engine running? Good luck. I would think the service rep could find that. __________________ 2016 Camaro 1SS Hyper Blue 6MT NPP 2010 Camaro 2SS Cam/Headers/CAI/3.91 gears 476 rwhp/440 rwtq (sold)

03-31-2021, 01:59 PM	#7
nancygrl 雪の玉 Drives: '22 Z71 RST Silverado Join Date: Feb 2011 Location: South Posts: 3,415	No Bueno. Should be no problem taking care of it under warranty.

03-31-2021, 03:47 PM	#9
Turkish01 Drives: Camaro Join Date: Feb 2017 Location: Florida Posts: 97	That is the exact same noise I was talking about in the other npp rattle thread. It happened to me about 5k miles ago. Dealer replaced one of the actuators but it just came back again. Really frustrating.

03-31-2021, 03:56 PM	#10
ember1205 Hot Camaro Drives: '20 2SS Convertible 6MT Join Date: May 2020 Location: CT Posts: 3,534	I have a couple of working actuators that I'd be willing to sell if anyone needs them....

03-31-2021, 06:21 PM	#11
Andrewvandee Drives: 2019 Chevrolet Camaro 1SS Join Date: Mar 2021 Location: Florida Posts: 5	Dealer confirmed it was actuators. On BO so I picked up the car, and am waiting their callback once they receive the actuators and new seals. All under warranty

User Name		Remember Me?
Password