Whirring Sound on '17 ZL1

nicktechla · 12-05-2017, 03:51 PM

Recently my ZL1 started making a whirring sound at low speeds. It changes with rpm. I was thinking maybe an idler pulley. Anything else I should ask the dealer to check before I make them a call?

Soleil · 12-05-2017, 03:56 PM

Can you try to describe it more precisely. Is it only at low speed (gear) or also at stand with low rpm? Front or back? Left or right? Warm and or cold?

nicktechla · 12-05-2017, 03:57 PM

Quote:

Originally Posted by Soleil

Can you try to describe it more precisely. Is it only at low speed (gear) or also at stand with low rpm? Front or back? Left or right? Warm and or cold?

I'll try to get a video of it bit. It's not super loud, so hopefully it comes through on the camera. It sounds like its coming from the front. I can hear it at speed on the freeway if its quiet. It happens warm and cold. Also it sounds a bit noisy with the hood popped.

Tara Martin · 12-06-2017, 12:33 PM

My ZL-1 did the same thing starting at about 10k miles. I took it to the dealer and they advised me that there's a GM engineering study going on about the issue. They also told me that it's safe to drive, but I swear it's getting louder. It sounds like a beer keg full of cicadas humming/buzzing. You can't hear it at idle, but as soon as you increase engine speed, it's there. You hear it loudly if you're next to a curb or wall with your window down.

I wouldn't have worried much about it if it had always done it, but as it started about 10k, I was worried that something was going to break.

Go to your dealer and get it documented so they'll contact you back when/if there's a warranty fix.

Tara

nicktechla · 12-06-2017, 12:40 PM

Quote:

Originally Posted by Tara Martin

My ZL-1 did the same thing starting at about 10k miles. I took it to the dealer and they advised me that there's a GM engineering study going on about the issue. They also told me that it's safe to drive, but I swear it's getting louder. It sounds like a beer keg full of cicadas humming/buzzing. You can't hear it at idle, but as soon as you increase engine speed, it's there. You hear it loudly if you're next to a curb or wall with your window down.

I wouldn't have worried much about it if it had always done it, but as it started about 10k, I was worried that something was going to break.

Go to your dealer and get it documented so they'll contact you back when/if there's a warranty fix.

Tara

thanks. that sounds pretty similar.

camaro5 · 12-06-2017, 10:21 PM

Service Bulletin: #PIP5485: Supercharger Whine ...

Brand: Model: Model Year: VIN: Engine: Transmission: from. to. from. to. Cadillac. CTS-V. 2017. All. All. 6.2L LT4. All. Chevrolet. Camaro. 2017. All. All. 6.2L LT4. All. Chevrolet. Corvette. 2017. All. All. 6.2L LT4. All. Involved Region or Country. North America. Additional RPO/s: LT4

Mar 16, 2017 - Involved Region or Country. North America. Additional RPO/s: LT4.

Condition. Customer may comment on a whine noise from the engine bay.

Cause. Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

If supercharger whine can be heard, Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

Condition will dissipate after 1200 - 1400 miles.

http://www.corvetteactioncenter.com/...2017-1334.html

j

nicktechla · 12-06-2017, 10:40 PM

Quote:

Originally Posted by camaro5

Service Bulletin: #PIP5485: Supercharger Whine ...

Brand: Model: Model Year: VIN: Engine: Transmission: from. to. from. to. Cadillac. CTS-V. 2017. All. All. 6.2L LT4. All. Chevrolet. Camaro. 2017. All. All. 6.2L LT4. All. Chevrolet. Corvette. 2017. All. All. 6.2L LT4. All. Involved Region or Country. North America. Additional RPO/s: LT4

Mar 16, 2017 - Involved Region or Country. North America. Additional RPO/s: LT4.

Condition. Customer may comment on a whine noise from the engine bay.

Cause. Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

If supercharger whine can be heard, Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

Condition will dissipate after 1200 - 1400 miles.

http://www.corvetteactioncenter.com/...2017-1334.html

j

thanks

Tara Martin · 12-08-2017, 01:33 PM

Quote:

Originally Posted by camaro5

Service Bulletin: #PIP5485: Supercharger Whine ...

Brand: Model: Model Year: VIN: Engine: Transmission: from. to. from. to. Cadillac. CTS-V. 2017. All. All. 6.2L LT4. All. Chevrolet. Camaro. 2017. All. All. 6.2L LT4. All. Chevrolet. Corvette. 2017. All. All. 6.2L LT4. All. Involved Region or Country. North America. Additional RPO/s: LT4

Mar 16, 2017 - Involved Region or Country. North America. Additional RPO/s: LT4.

Condition. Customer may comment on a whine noise from the engine bay.

Cause. Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

If supercharger whine can be heard, Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit.

Condition will dissipate after 1200 - 1400 miles.

http://www.corvetteactioncenter.com/...2017-1334.html

j

Thanks for this! "dissipate after 1200-1400 miles?" Mine started about 10k and is now 12k, so I'll see on that one. I'll wait till after the first of the year and nag my service manager about it again if it's still noisy.

Tara

nicktechla · 12-08-2017, 01:40 PM

Quote:

Originally Posted by Tara Martin

Thanks for this! "dissipate after 1200-1400 miles?" Mine started about 10k and is now 12k, so I'll see on that one. I'll wait till after the first of the year and nag my service manager about it again if it's still noisy.

Tara

yeah i think mine started at 6-7k, still going at 9500.

camaro5 · 12-09-2017, 12:16 AM

Quote:

Originally Posted by Tara Martin

Thanks for this! "dissipate after 1200-1400 miles?" Mine started about 10k and is now 12k, so I'll see on that one. I'll wait till after the first of the year and nag my service manager about it again if it's still noisy.

Tara

Quote:

Originally Posted by nicktechla

yeah i think mine started at 6-7k, still going at 9500.

May be wishful thinking on GM's part.

You might be able to use the fact that it has not dissipated in 1200 - 1400mi as a way to get them to replace the SC.

nicktechla · 12-09-2017, 01:57 PM

this might fix it also

https://whipplesuperchargers.com/ind...product_id=454

Tara Martin · 12-13-2017, 02:46 PM

Quote:

Originally Posted by nicktechla

this might fix it also

https://whipplesuperchargers.com/ind...product_id=454

Lol! Not for me yet! I need my warranty for at least a while!

Tara

nicktechla · 01-12-2018, 09:09 PM

Update, they said its a bad idler pulley. Getting it replaced on Tuesday. I'll update again if it sounds better

nicktechla · 01-17-2018, 10:20 PM

All fixed after the idler pulley

12-05-2017, 03:51 PM	#1
nicktechla Drives: 2012 Porsche 911 Turbo S Join Date: Jan 2017 Location: Los Angeles, CA Posts: 1,776	Whirring Sound on '17 ZL1 Recently my ZL1 started making a whirring sound at low speeds. It changes with rpm. I was thinking maybe an idler pulley. Anything else I should ask the dealer to check before I make them a call? __________________ IG: 2fast2nick -- Current -- 2012 Porsche Turbo S - PDK - Basalt Black Metallic -- Past -- 2017 Camaro ZL1 Coupe - Red Hot - A10, PDR - HRE P101 2015 Mustang GT PP - Whipple Supercharger

12-05-2017, 03:56 PM	#2
Soleil Drives: Camaro 50th anniversary edition Join Date: May 2017 Location: Europe Posts: 2,203 View My Garage	Can you try to describe it more precisely. Is it only at low speed (gear) or also at stand with low rpm? Front or back? Left or right? Warm and or cold? __________________ Soleil _____________________________________________ A car is fast enough, if you fear to unlock it in the morning." (Walter Roehrl)

12-06-2017, 12:33 PM	#4
Tara Martin Loves Camaros Drives: Red '79 Z28, '21 Red Hot M6 ZL-1! Join Date: Sep 2012 Location: Corpus Christi, TX Posts: 1,622 View My Garage	My ZL-1 did the same thing starting at about 10k miles. I took it to the dealer and they advised me that there's a GM engineering study going on about the issue. They also told me that it's safe to drive, but I swear it's getting louder. It sounds like a beer keg full of cicadas humming/buzzing. You can't hear it at idle, but as soon as you increase engine speed, it's there. You hear it loudly if you're next to a curb or wall with your window down. I wouldn't have worried much about it if it had always done it, but as it started about 10k, I was worried that something was going to break. Go to your dealer and get it documented so they'll contact you back when/if there's a warranty fix. Tara __________________ Old and new, sharing space!

12-06-2017, 10:21 PM	#6
camaro5 Drives: X-15 Velocipede Join Date: Mar 2008 Location: SW Florida Posts: 4,637	Service Bulletin: #PIP5485: Supercharger Whine ... Brand: Model: Model Year: VIN: Engine: Transmission: from. to. from. to. Cadillac. CTS-V. 2017. All. All. 6.2L LT4. All. Chevrolet. Camaro. 2017. All. All. 6.2L LT4. All. Chevrolet. Corvette. 2017. All. All. 6.2L LT4. All. Involved Region or Country. North America. Additional RPO/s: LT4 Mar 16, 2017 - Involved Region or Country. North America. Additional RPO/s: LT4. Condition. Customer may comment on a whine noise from the engine bay. Cause. Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit. If supercharger whine can be heard, Engineering is aware of this concern and have determined it will not impact durability and operation of the supercharger unit. Condition will dissipate after 1200 - 1400 miles. http://www.corvetteactioncenter.com/...2017-1334.html j __________________ Go from the presence of a foolish man, when thou perceivest not in him the lips of knowledge General Motors ASEP, A.S. Automotive Technology, Telecommunications Specialist, CISCO Network Engineer STANDARD DISCLAIMER camaro5 is furnishing this information "as is". camaro5 does not provide any warranty of the information whatsoever, whether express, implied, or statutory, including, but not limited to, any warranty of merchantability or fitness for a particular purpose or any warranty that the contents of the information will be error-free.

12-09-2017, 01:57 PM	#11
nicktechla Drives: 2012 Porsche 911 Turbo S Join Date: Jan 2017 Location: Los Angeles, CA Posts: 1,776	this might fix it also https://whipplesuperchargers.com/ind...product_id=454 __________________ IG: 2fast2nick -- Current -- 2012 Porsche Turbo S - PDK - Basalt Black Metallic -- Past -- 2017 Camaro ZL1 Coupe - Red Hot - A10, PDR - HRE P101 2015 Mustang GT PP - Whipple Supercharger

01-12-2018, 09:09 PM	#13
nicktechla Drives: 2012 Porsche 911 Turbo S Join Date: Jan 2017 Location: Los Angeles, CA Posts: 1,776	Update, they said its a bad idler pulley. Getting it replaced on Tuesday. I'll update again if it sounds better __________________ IG: 2fast2nick -- Current -- 2012 Porsche Turbo S - PDK - Basalt Black Metallic -- Past -- 2017 Camaro ZL1 Coupe - Red Hot - A10, PDR - HRE P101 2015 Mustang GT PP - Whipple Supercharger

01-17-2018, 10:20 PM	#14
nicktechla Drives: 2012 Porsche 911 Turbo S Join Date: Jan 2017 Location: Los Angeles, CA Posts: 1,776	All fixed after the idler pulley __________________ IG: 2fast2nick -- Current -- 2012 Porsche Turbo S - PDK - Basalt Black Metallic -- Past -- 2017 Camaro ZL1 Coupe - Red Hot - A10, PDR - HRE P101 2015 Mustang GT PP - Whipple Supercharger

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