NPP squeaking noise

bseiter98 · 03-02-2016, 03:52 PM

Just started up my SS and noticed a fairly loud squeaking noise when going from the Tour mode to the Sport mode. It only lasts for a second or so. Anyone else have this problem? The temperature is about 30°F currently, I do not recall hearing this when it was warmer out. Thanks!

jimmypop13 · 03-02-2016, 04:16 PM

I had a very loud chirp when switching from v8 to v4 mode on my first NPP. My new one doesn't do it. I'd take it to the dealer if it bothers you enough. They may replace it

bseiter98 · 03-02-2016, 04:18 PM

Thanks Jimmypop13, I will do just that when I bring it in for my first oil change.

Netslave · 03-02-2016, 04:39 PM

Anything like this?

http://www.camaro6.com/forums/showth...exhaust+rattle

bseiter98 · 03-02-2016, 04:52 PM

Quote:

Originally Posted by Netslave

Anything like this?

http://www.camaro6.com/forums/showth...exhaust+rattle

Nope, just a quick chirp...

Zultain7 · 03-02-2016, 05:17 PM

Quote:

Originally Posted by bseiter98

Just started up my SS and noticed a fairly loud squeaking noise when going from the Tour mode to the Sport mode. It only lasts for a second or so. Anyone else have this problem? The temperature is about 30°F currently, I do not recall hearing this when it was warmer out. Thanks!

Mine did the same thing, just a little chirp noise. Its the set of valves closing in the exhaust. I spoke with my dealer and they said they have never heard of it before and most likely something with the valve is loose or build up has caused the clearances to be too tight.

jimmypop13 · 03-02-2016, 06:48 PM

Quote:

Originally Posted by Netslave

Anything like this?

http://www.camaro6.com/forums/showth...exhaust+rattle

That's my car. They replaced that system with the revised green dot system. Still doing the same though. Someone is coming to look at it on Friday so we will see what happens! The chirp sounds like a bird. It happened on mine with the upstream valves during the v4-v8 transition. The new system did fix this

bseiter98 · 03-15-2016, 05:31 PM

Appointment with Dealer on Monday, will let all know what comes of it!

bseiter98 · 03-21-2016, 05:14 PM

Had the appointment with Dealer... Their instructions were to grease it so they did. Got home, backed in by garage and put the car in tour mode. Squeak is now louder than before. Frustrating!

raptor5244 · 03-21-2016, 09:36 PM

Sounds like the squeeky NPP has been going on for a while since the system was introduced in the corvette.

http://www.corvetteforum.com/forums/...es-in-npp.html
http://www.corvetteforum.com/forums/...on-of-fix.html
http://www.corvetteforum.com/forums/...le-squeak.html

The NPP in my GEN5 is different than the stingray and new Camaro. Only manual trans had the option for NPP since they don't have AFM. Furthermore the valves are vacuum based not electric like they are on the stingray and gen 6 Camaro.

bseiter98 · 03-29-2016, 04:23 PM

Update - Returned the car to the Dealer today and they reviewed the issue with GM Engineers. I guess they measured the loudness (SPL) of the squeak and it was decided the best course of action was to replace the exhaust system. I do not have the details yet as to what they ordered as I doubt it was the entire exhaust just the sections with the NPP valve. Anyway, just wanted to provide an update.

Bitchin' Camaro · 03-29-2016, 07:51 PM

Quote:

Originally Posted by bseiter98

Just started up my SS and noticed a fairly loud squeaking noise when going from the Tour mode to the Sport mode. It only lasts for a second or so. Anyone else have this problem? The temperature is about 30°F currently, I do not recall hearing this when it was warmer out. Thanks!

Just adding this for others with a similar issue, since it sounds like the dealer has evaluated yours and come to a service action.

This applies to a squeak when changing modes, not the issues some have with a rattling valve that is constant or at least appears in a certain rev range. There is a TSB to cover the squeak when changing modes. It was originally for Corvettes but amended to cover the 2016 Camaro thru Dec 15th builds.

bseiter98 · 03-30-2016, 03:15 PM

Quote:

Originally Posted by Bitchin' Camaro

Just adding this for others with a similar issue, since it sounds like the dealer has evaluated yours and come to a service action.

This applies to a squeak when changing modes, not the issues some have with a rattling valve that is constant or at least appears in a certain rev range. There is a TSB to cover the squeak when changing modes. It was originally for Corvettes but amended to cover the 2016 Camaro thru Dec 15th builds.

Thanks, I had heard about a TSB but never actually saw it until you posted it.

ReFLeX135 · 05-24-2016, 08:49 PM

Quote:

Originally Posted by bseiter98

Thanks, I had heard about a TSB but never actually saw it until you posted it.

Just curious, how did this turn out for you? Currently mine chirps from v8 to v4, squeaks while driving at random times, and rattles in all modes. They might be replacing my exhaust but I'm not sure yet. They don't believe me about the squeak or the AFM chirp and called it a "click" form the transmission gears changing =/ I removed f51 and the squeak stopped but not the rest ofc.

03-02-2016, 03:52 PM	#1
bseiter98 Drives: 2016 Camaro 2SS Join Date: Feb 2016 Location: Ohio Posts: 125	NPP squeaking noise Just started up my SS and noticed a fairly loud squeaking noise when going from the Tour mode to the Sport mode. It only lasts for a second or so. Anyone else have this problem? The temperature is about 30°F currently, I do not recall hearing this when it was warmer out. Thanks!

03-02-2016, 04:16 PM	#2
jimmypop13 Drives: 2016 camaro ss Join Date: Oct 2010 Location: Spring, TX Posts: 1,127	I had a very loud chirp when switching from v8 to v4 mode on my first NPP. My new one doesn't do it. I'd take it to the dealer if it bothers you enough. They may replace 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

03-02-2016, 04:18 PM	#3
bseiter98 Drives: 2016 Camaro 2SS Join Date: Feb 2016 Location: Ohio Posts: 125	Thanks Jimmypop13, I will do just that when I bring it in for my first oil change.

03-15-2016, 05:31 PM	#8
bseiter98 Drives: 2016 Camaro 2SS Join Date: Feb 2016 Location: Ohio Posts: 125	Appointment with Dealer on Monday, will let all know what comes of it!

03-21-2016, 05:14 PM	#9
bseiter98 Drives: 2016 Camaro 2SS Join Date: Feb 2016 Location: Ohio Posts: 125	Had the appointment with Dealer... Their instructions were to grease it so they did. Got home, backed in by garage and put the car in tour mode. Squeak is now louder than before. Frustrating!

03-21-2016, 09:36 PM	#10
raptor5244 Drives: 2022 CT4-V Blackwing Join Date: Sep 2013 Location: Florida Posts: 2,723	Sounds like the squeeky NPP has been going on for a while since the system was introduced in the corvette. http://www.corvetteforum.com/forums/...es-in-npp.html http://www.corvetteforum.com/forums/...on-of-fix.html http://www.corvetteforum.com/forums/...le-squeak.html The NPP in my GEN5 is different than the stingray and new Camaro. Only manual trans had the option for NPP since they don't have AFM. Furthermore the valves are vacuum based not electric like they are on the stingray and gen 6 Camaro.

03-29-2016, 04:23 PM	#11
bseiter98 Drives: 2016 Camaro 2SS Join Date: Feb 2016 Location: Ohio Posts: 125	Update - Returned the car to the Dealer today and they reviewed the issue with GM Engineers. I guess they measured the loudness (SPL) of the squeak and it was decided the best course of action was to replace the exhaust system. I do not have the details yet as to what they ordered as I doubt it was the entire exhaust just the sections with the NPP valve. Anyway, just wanted to provide an update.

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