NPP "Rattle" - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Saved by Grace · 03-05-2015, 04:03 PM

Hey guys, thought I would just share a little bit since I have lurked and learned so much on this forum.

Short story is recently bought a used 2014 1LE with 16,000 miles. I noticed recently that at low RPM I can hear a metallic rattle from the exhaust system. Very noticeable at a restaurant drive through because the sound would bounce off the wall.

Disclaimer - I'm no mechanic!

At first I thought it was maybe the butterfly valve. Like it was loose and rattling or something.

So I took it to the dealership for an oil change and told them what I was hearing. After checking it out that told me it was the baffle. I asked if they were going to do, if anything.

Answer? Entirely new exhaust system!

Should be here in about a week. Just thought I would share in case anybody else hears something similar.

-SBG

mbowen89 · 03-05-2015, 04:10 PM

Wow, warranty fix then? Crazy

CamaroDreams76 · 03-05-2015, 04:37 PM

I didn't notice a rattle until I installed high flow cats. Doesn't really bother me. That's awesome you got it replaced under warranty though

cornerspeed92 · 03-05-2015, 04:45 PM

I never had a rattle, but after the High flow cat's were installed i noticed what looked like horse hair at the back of the exhaust. Apparently it is part of the sound dampening coming out.

vinman · 03-05-2015, 04:50 PM

Quote:

Originally Posted by cornerspeed92

I never had a rattle, but after the High flow cat's were installed i noticed what looked like horse hair at the back of the exhaust. Apparently it is part of the sound dampening coming out.

That's a good thing right

snarky · 03-05-2015, 05:03 PM

yep, I have that. heard it since new mostly at idle and intermittent. thought it sounded like a loose heat shield and had them do a check at my first service. dealer told me they couldn't identify the source but did hear it. they said a tech would need to look at it as these were just " oil change guys " nothing was loose and they mentioned it was probably in the muffler / exhaust. since nothing is going to fall off I just quit worrying about it. rattles more when cold. not much when warmed up. does sound just like a baby rattle if the came in metal....

nmartin1216 · 03-05-2015, 08:02 PM

had this, turned out it was a loose clip on the drivers side exhaust, roughly around the position directly under the drivers seat. Just a metal little clip that came loose and would kinddddd of rattle. Wouldnt really make the noise unless i was at a stop then as soon as i would start going it would make the noise. The tech fixed it by taking it off and "stretching it" then putting it back in place. hope that helps.

backeddy · 03-05-2015, 10:04 PM

Quote:

That's a good thing right

Not in CA!!!!!

cottrellj2 · 03-05-2015, 11:00 PM

I thought most people did the fuse pull to disable the flapper. That would be one way to confirm, but if you are getting a new NPP, even better. The only thing I ever heard was what I thought was the flapper, pulled the fuse, and good to go. Unless you actually want the quiet mode.... lol.

Camaro Dude · 03-06-2015, 12:36 AM

Light lil rattle is a common issue on the NPP, I had mine fixed under warranty. I honestly thought it was something inside the exhaust piping, but it turned out to be a clamp that needed tightening/readjusting.

snarky · 03-06-2015, 06:19 AM

Quote:

Originally Posted by nmartin1216

had this, turned out it was a loose clip on the drivers side exhaust, roughly around the position directly under the drivers seat. Just a metal little clip that came loose and would kinddddd of rattle. Wouldnt really make the noise unless i was at a stop then as soon as i would start going it would make the noise. The tech fixed it by taking it off and "stretching it" then putting it back in place. hope that helps.

Thanks much for this info. Did the fuse pull and had no effect on rattle. Rattle is not rpm dependent. Clamp rub makes a lot of sense. I will mention it to the service manager in a kind and non-instructive manner the next time I go to the dentist. Er...dealership.

JantzenOKC · 03-06-2015, 08:44 AM

Quote:

Originally Posted by nmartin1216

had this, turned out it was a loose clip on the drivers side exhaust, roughly around the position directly under the drivers seat. Just a metal little clip that came loose and would kinddddd of rattle. Wouldnt really make the noise unless i was at a stop then as soon as i would start going it would make the noise. The tech fixed it by taking it off and "stretching it" then putting it back in place. hope that helps.

There's actually a TSB on that problem. It says to just bend the little retainer clip peice away from the pipe so it can't touch and rattle. Funny because that defeats the purpose of the clip even being on there.

Saved by Grace · 03-06-2015, 05:23 PM

For the record fuse pull did nothing to reduce the rattle.

Good to hear about the clip, but would a dealership really order me an entirely new exhaust system just for that? I would like to think it was a bigger issue.

Warranty repair, not complaining!

SBG

Wollmank · 03-06-2015, 06:58 PM

Had same problem. Dealership even replaced entire exhaust. Still rattled. It was the heat shield. Warranty.

03-05-2015, 04:03 PM	#1
Saved by Grace Drives: 2014 2SS RS 1LE Join Date: Jan 2015 Location: FL Posts: 23	NPP "Rattle" Hey guys, thought I would just share a little bit since I have lurked and learned so much on this forum. Short story is recently bought a used 2014 1LE with 16,000 miles. I noticed recently that at low RPM I can hear a metallic rattle from the exhaust system. Very noticeable at a restaurant drive through because the sound would bounce off the wall. Disclaimer - I'm no mechanic! At first I thought it was maybe the butterfly valve. Like it was loose and rattling or something. So I took it to the dealership for an oil change and told them what I was hearing. After checking it out that told me it was the baffle. I asked if they were going to do, if anything. Answer? Entirely new exhaust system! Should be here in about a week. Just thought I would share in case anybody else hears something similar. -SBG

03-05-2015, 04:37 PM	#3
CamaroDreams76 Tri-County Camaro SWFL Drives: 2013 IOM 2SS/RS/1LE Join Date: Apr 2013 Location: South West FL Posts: 3,106 View My Garage	I didn't notice a rattle until I installed high flow cats. Doesn't really bother me. That's awesome you got it replaced under warranty though __________________ Just bolt ons........ https://www.camaro5.com/forums/showthread.php?t=343023

03-05-2015, 04:45 PM	#4
cornerspeed92 Drives: 2013 1SS 1LE Join Date: Jul 2012 Location: Colorado Posts: 4,188 View My Garage	I never had a rattle, but after the High flow cat's were installed i noticed what looked like horse hair at the back of the exhaust. Apparently it is part of the sound dampening coming out. __________________

03-05-2015, 05:03 PM	#6
snarky ultracrepidarianism Drives: '14 1SS/RS/1LE/NPP '18 Accord Sport Join Date: Mar 2014 Location: where folks drive like shit Posts: 1,297	yep, I have that. heard it since new mostly at idle and intermittent. thought it sounded like a loose heat shield and had them do a check at my first service. dealer told me they couldn't identify the source but did hear it. they said a tech would need to look at it as these were just " oil change guys " nothing was loose and they mentioned it was probably in the muffler / exhaust. since nothing is going to fall off I just quit worrying about it. rattles more when cold. not much when warmed up. does sound just like a baby rattle if the came in metal.... __________________

03-05-2015, 11:00 PM	#9
cottrellj2 Blue Ray SCPO Drives: 2013 Camaro 2SS/RS Join Date: Mar 2013 Location: San Diego, CA Posts: 61 View My Garage	I thought most people did the fuse pull to disable the flapper. That would be one way to confirm, but if you are getting a new NPP, even better. The only thing I ever heard was what I thought was the flapper, pulled the fuse, and good to go. Unless you actually want the quiet mode.... lol. __________________

03-05-2015, 04:10 PM	#2
mbowen89 Drives: 2015 CRT 2SS/RS 1LE Join Date: Feb 2014 Location: IN Posts: 638	Wow, warranty fix then? Crazy

03-05-2015, 08:02 PM	#7
nmartin1216 Drives: 14 white Camaro 1LE 2SS/RS Join Date: Oct 2013 Location: Tampa, Florida Posts: 341	had this, turned out it was a loose clip on the drivers side exhaust, roughly around the position directly under the drivers seat. Just a metal little clip that came loose and would kinddddd of rattle. Wouldnt really make the noise unless i was at a stop then as soon as i would start going it would make the noise. The tech fixed it by taking it off and "stretching it" then putting it back in place. hope that helps.

03-06-2015, 12:36 AM	#10
Camaro Dude Drives: ‘13 1LE Join Date: Jul 2013 Location: Earth Posts: 3,904	Light lil rattle is a common issue on the NPP, I had mine fixed under warranty. I honestly thought it was something inside the exhaust piping, but it turned out to be a clamp that needed tightening/readjusting.

03-06-2015, 05:23 PM	#13
Saved by Grace Drives: 2014 2SS RS 1LE Join Date: Jan 2015 Location: FL Posts: 23	For the record fuse pull did nothing to reduce the rattle. Good to hear about the clip, but would a dealership really order me an entirely new exhaust system just for that? I would like to think it was a bigger issue. Warranty repair, not complaining! SBG

03-06-2015, 06:58 PM	#14
Wollmank Drives: 2014 Camaro 2SS/RS 1LE AGM Join Date: Jul 2012 Location: West Palm Beach Posts: 228 View My Garage	Had same problem. Dealership even replaced entire exhaust. Still rattled. It was the heat shield. Warranty.