NPP passenger valve rattle when closed?

jimmypop13 · 12-27-2015, 02:43 PM

I've been leaving my valves closed the past few days and am hearing a massive rattle on the passenger side on cold start and then when I accelerate from a stop. If I give it a quick rev, it also does it. I'm pretty sure it must be the NPP valve on the side not being tightly closed since I never heard it before while they were open.
Anyone else had this issue?

EDIT: got a video during a cold start

https://youtu.be/P88WUJEh_cM

jimmypop13 · 12-27-2015, 03:11 PM

Confirmed it's the valve causing the rattle. I started it cold. As soon as the valve closes on the passenger side, the rattle starts. I took a long screw driver and could feel the valve rattling. As soon as I apply pressure to the valve, the rattle stops.

ChefBorOzzy · 12-27-2015, 07:32 PM

Considering it's a new car, not sure why you'd even attempt to deal with it. I'd take it in and have them fix it.

jimmypop13 · 12-27-2015, 07:47 PM

Quote:

Originally Posted by ChefBorOzzy

Considering it's a new car, not sure why you'd even attempt to deal with it. I'd take it in and have them fix it.

I just hate to give it up for a few days. Would be nice if it was something easy like a screw loose but everything looks good. Just too much play in the bar of the butterfly valve I think.

jimmypop13 · 12-28-2015, 04:53 AM

https://youtu.be/P88WUJEh_cM

Got a cold start video so you can really hear it

jimmypop13 · 12-29-2015, 09:23 AM

Dropped it off at the dealer this morning. Will report back with updates

63falcondude · 12-29-2015, 10:03 AM

Quote:

Originally Posted by jimmypop13

https://youtu.be/P88WUJEh_cM

Got a cold start video so you can really hear it

Wow, that sounds horrible. Hope it all works out for you.

dillonSSwalker · 01-02-2016, 11:02 AM

Any update on this? Mine rattles every time at about 1500 rpm. Bothersome when I don't have my music playing.

bybcous · 01-02-2016, 11:11 AM

I can here mine opening and closing randonly while the car is turned off for about 4 minutes after a ride but it diesnt bother me

MrImSoFly · 01-02-2016, 11:18 AM

I noticed the same issue for mines earlier this week..just took it to the shop and turns out the muffler pan was not correctly installed and a loose bolt needed to be tighten. Problem is solved now

jimmypop13 · 01-06-2016, 03:30 PM

Car has been at the dealer the past two days for this and a radio issue. They have ordered a new catback to replace mine. Sounds like all my issues will be solved shortly! I know we are guinea pigs with these new cars, I'm just so glad GM has been so awesome about solving these early problems quickly. I'm very happy with my experience dealing with GM and the service department.

BlkReaper · 01-07-2016, 02:23 PM

I also have the same problem

i007spectre · 01-14-2016, 11:59 AM

Any more info on this issue? Mine does it right when it shifts, then goes away when cruising.

6spdhyperblue · 01-14-2016, 12:20 PM

Quote:

Originally Posted by jimmypop13

Car has been at the dealer the past two days for this and a radio issue. They have ordered a new catback to replace mine. Sounds like all my issues will be solved shortly! I know we are guinea pigs with these new cars, I'm just so glad GM has been so awesome about solving these early problems quickly. I'm very happy with my experience dealing with GM and the service department.

just speculation, but seems to me they want to send this back for research for possible push back on the catback supplier.

is there a spring that holds the valve open?

12-27-2015, 02:43 PM	#1
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	NPP passenger valve rattle when closed? I've been leaving my valves closed the past few days and am hearing a massive rattle on the passenger side on cold start and then when I accelerate from a stop. If I give it a quick rev, it also does it. I'm pretty sure it must be the NPP valve on the side not being tightly closed since I never heard it before while they were open. Anyone else had this issue? EDIT: got a video during a cold start https://youtu.be/P88WUJEh_cM __________________ 2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85 Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS RIP : 2002 WS6 Black, A4, 355rwhp Last edited by jimmypop13; 12-28-2015 at 04:52 AM.

12-27-2015, 03:11 PM	#2
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	Confirmed it's the valve causing the rattle. I started it cold. As soon as the valve closes on the passenger side, the rattle starts. I took a long screw driver and could feel the valve rattling. As soon as I apply pressure to the valve, the rattle stops. __________________ 2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85 Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS RIP : 2002 WS6 Black, A4, 355rwhp

12-28-2015, 04:53 AM	#5
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	https://youtu.be/P88WUJEh_cM Got a cold start video so you can really hear it __________________ 2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85 Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS RIP : 2002 WS6 Black, A4, 355rwhp

12-29-2015, 09:23 AM	#6
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	Dropped it off at the dealer this morning. Will report back with updates __________________ 2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85 Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS RIP : 2002 WS6 Black, A4, 355rwhp

01-02-2016, 11:11 AM	#9
bybcous Drives: 2016 Hyper Blue 1SS Join Date: Jul 2015 Location: hampton roads Posts: 2,763	I can here mine opening and closing randonly while the car is turned off for about 4 minutes after a ride but it diesnt bother me __________________ 1ss/Auto-Hyper Blue acs carbon flash spoiler, bmr springs, gm clear tails. Texas speed cam, 223/227 .635/.635 116 LSA, Kooks Long Tube Headers with green cats, MSD Atomic Air Force Intake, CAI Cold Air Intake, QTP cutouts. 503 hp Best so far 11.5 at 123 with a 1.83 60ft. BMR lower and upper trailing arms and upper control arms,E85 DELIVERED 12/29/15 http://youtube.com/bybcous " no talking only racing on my youtube"

12-27-2015, 07:32 PM	#3
ChefBorOzzy Drives: 2016 F150 Join Date: May 2014 Location: Iowa Posts: 2,196	Considering it's a new car, not sure why you'd even attempt to deal with it. I'd take it in and have them fix it.

01-02-2016, 11:02 AM	#8
dillonSSwalker Drives: 2016 Chevy Camaro 1SS... NPP, A8. Join Date: Oct 2015 Location: Oklahoma City Posts: 129	Any update on this? Mine rattles every time at about 1500 rpm. Bothersome when I don't have my music playing.

01-02-2016, 11:18 AM	#10
MrImSoFly Drives: 2017 Hyper Blue 2SS Join Date: Jul 2015 Location: Chicago Posts: 317	I noticed the same issue for mines earlier this week..just took it to the shop and turns out the muffler pan was not correctly installed and a loose bolt needed to be tighten. Problem is solved now

01-06-2016, 03:30 PM	#11
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	Car has been at the dealer the past two days for this and a radio issue. They have ordered a new catback to replace mine. Sounds like all my issues will be solved shortly! I know we are guinea pigs with these new cars, I'm just so glad GM has been so awesome about solving these early problems quickly. I'm very happy with my experience dealing with GM and the service department. __________________ 2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85 Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS RIP : 2002 WS6 Black, A4, 355rwhp

01-07-2016, 02:23 PM	#12
BlkReaper Drives: 2016 2ss Join Date: Aug 2015 Location: Phoeinx, AZ Posts: 139	I also have the same problem

01-14-2016, 11:59 AM	#13
i007spectre Drives: 2016 2SS, 2008 HHR ECTO-2H Join Date: Aug 2009 Location: Springfield, Mo Posts: 1,927 View My Garage	Any more info on this issue? Mine does it right when it shifts, then goes away when cruising. __________________ 2016 Camaro 2SS. Hyper Blue, Ceramic White, Auto, MRC, and NPP. 1100 - 9/25 2000 - 9/28 3000 - 9/30 3100 - 10/27 3300 - 10/28 3400 - 10/29 TPW 11/09 3800 - 11/10 4300 - 11/24 4B00 - 11/25 4200 - 12/5 5000 - 12/7 6000 - 12/11

User Name		Remember Me?
Password