What went wrong

tx915zl · 04-11-2020, 03:21 PM

I own a manual 2017 ZL1. I took in into the stealership because of a noisy supercharger. Dealership said it did a new upper pulley, so they replaced it u under warranty. Not that I have the car back, it seems that the supercharger whine is a lot quieter than before and the car does not to pull as hard as it did before, through any of the gears. What gives? Anyone have any idea why this would have happened? Is there anything else that might be wrong with it. Only mods are k&n CAI n ported throttle body. Thanks in advance

Gunkk · 04-11-2020, 03:37 PM

Air in the SC coolant loop will cause the pump to cavitate and shut down boost. No codes will be thrown.

Bleed the SC loop.

https://www.camaro6.com/forums/showthread.php?t=523702

https://www.camaro6.com/forums/showp...8&postcount=12

Pantherzl1 · 04-11-2020, 05:21 PM

These idiots probably didn’t bleed the super charger after. Make sure you bleed it

Nev3rL8 · 04-11-2020, 07:56 PM

so the SC needs bleeding every time the pulley is replaced?

Gunkk · 04-11-2020, 08:43 PM

Quote:

Originally Posted by Nev3rL8

so the SC needs bleeding every time the pulley is replaced?

Pretty sure you cannot change the pulley block bearing with the SC on the car.

tx915zl · 04-12-2020, 01:39 AM

I’ll be taking back to the dealership and ask them to bleed the lines, thanks for the responses.

Nev3rL8 · 04-12-2020, 10:12 AM

Quote:

Originally Posted by Gunkk

Pretty sure you cannot change the pulley block bearing with the SC on the car.

Good to know, thanks.

zx9rmal · 04-14-2020, 09:34 AM

I do not track my car. How would I know if I need to do this procedure? The car definitely has a drop off in power in hot weather. Thanks.

tx915zl · 04-17-2020, 04:23 PM

Had the service performed and no change. It still doesn’t feel the way it should, what gives? Any other ideas, what could be causing the issue?

FoundNemo · 04-17-2020, 04:34 PM

Check the bypass valve set screw, post a pic up and I'll have a look for you. What is your boost gauge peaking at on a WOT hwy pull?

As noted, take it back and make them bleed the supercharger coolant pathways. Or get the edelbrock reservoir and do it yourself.

PROMETHEUS · 04-17-2020, 04:59 PM

Get the ADM performance LT4 SC reservoir and you wouldn't have to worry about air in the lines. It takes less than a hour to install and it is well worth the money, plus it gives you a little more coolant.

Stefano · 04-17-2020, 09:25 PM

Quote:

Originally Posted by PROMETHEUS

Get the ADM performance LT4 SC reservoir and you wouldn't have to worry about air in the lines. It takes less than a hour to install and it is well worth the money, plus it gives you a little more coolant.

Good advise.

Juiced1 · 04-18-2020, 09:37 AM

A reservoir goes a long way. If you don't have one its very easy for an air bubble to shut down your pump. No pump means sky rocketing intake temps and no power. I can't stress enough how many dealers skip the bleeding process. Nearly half of the cars don't have any fluid in their blowers when we take them apart.

OP did you buy the car new? I've never heard of a noisy pulley? If anything goes bad on the supercharger it would be bearings or isolator. Or maybe a tensioner/idler pulley could have gone bad which wouldn't require them to remove the blower.

Alain · 04-18-2020, 12:41 PM

Subscribed

04-11-2020, 03:21 PM	#1
tx915zl Drives: 2017 Camaro zl1 Join Date: Jul 2018 Location: El Paso, Tx Posts: 19	What went wrong I own a manual 2017 ZL1. I took in into the stealership because of a noisy supercharger. Dealership said it did a new upper pulley, so they replaced it u under warranty. Not that I have the car back, it seems that the supercharger whine is a lot quieter than before and the car does not to pull as hard as it did before, through any of the gears. What gives? Anyone have any idea why this would have happened? Is there anything else that might be wrong with it. Only mods are k&n CAI n ported throttle body. Thanks in advance

04-14-2020, 09:34 AM	#8
zx9rmal Drives: '20 ZL1 M6 Join Date: Apr 2017 Location: FT. Lauderdale, FL Posts: 717	I do not track my car. How would I know if I need to do this procedure? The car definitely has a drop off in power in hot weather. Thanks. __________________ Mal Ft. Lauderdale, FL '20 Camaro ZL1 M6 '22 Kawasaki ZX-14R

04-18-2020, 12:41 PM	#14
Alain Drives: 2016 Challenger Hellcat, 2018 ZL1LE Join Date: Dec 2009 Location: Northern NJ Posts: 3,003	Subscribed __________________ 2016 Challenger Hellcat /B5 blue/Sepia interior/Brass Monkey Wheels/ 2018 ZL1 1LE/Red hot 2019 Shellby GT 350R/ Oxford white/ Matte Black Stripes/ Carbon Fiber Dash/ Electronics Package #413

04-11-2020, 03:37 PM	#2
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 4,978 View My Garage	Air in the SC coolant loop will cause the pump to cavitate and shut down boost. No codes will be thrown. Bleed the SC loop. https://www.camaro6.com/forums/showthread.php?t=523702 https://www.camaro6.com/forums/showp...8&postcount=12

04-11-2020, 05:21 PM	#3
Pantherzl1 Drives: 2019 Camaro zl1 Join Date: Jul 2019 Location: Detroit Posts: 54	These idiots probably didn’t bleed the super charger after. Make sure you bleed it

04-11-2020, 07:56 PM	#4
Nev3rL8 Drives: GTO Join Date: Mar 2020 Location: IL Posts: 10	so the SC needs bleeding every time the pulley is replaced?

04-12-2020, 01:39 AM	#6
tx915zl Drives: 2017 Camaro zl1 Join Date: Jul 2018 Location: El Paso, Tx Posts: 19	I’ll be taking back to the dealership and ask them to bleed the lines, thanks for the responses.

04-17-2020, 04:23 PM	#9
tx915zl Drives: 2017 Camaro zl1 Join Date: Jul 2018 Location: El Paso, Tx Posts: 19	Had the service performed and no change. It still doesn’t feel the way it should, what gives? Any other ideas, what could be causing the issue?

04-17-2020, 04:34 PM	#10
FoundNemo Drives: 2019 ZL1 Join Date: Oct 2019 Location: GA Posts: 573	Check the bypass valve set screw, post a pic up and I'll have a look for you. What is your boost gauge peaking at on a WOT hwy pull? As noted, take it back and make them bleed the supercharger coolant pathways. Or get the edelbrock reservoir and do it yourself.

04-17-2020, 04:59 PM	#11
PROMETHEUS Drives: 2019 ZL-1, Shadow Gray, Sold Join Date: Jan 2019 Location: Fredericksburg, VA Posts: 1,390	Get the ADM performance LT4 SC reservoir and you wouldn't have to worry about air in the lines. It takes less than a hour to install and it is well worth the money, plus it gives you a little more coolant.

04-18-2020, 09:37 AM	#13
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	A reservoir goes a long way. If you don't have one its very easy for an air bubble to shut down your pump. No pump means sky rocketing intake temps and no power. I can't stress enough how many dealers skip the bleeding process. Nearly half of the cars don't have any fluid in their blowers when we take them apart. OP did you buy the car new? I've never heard of a noisy pulley? If anything goes bad on the supercharger it would be bearings or isolator. Or maybe a tensioner/idler pulley could have gone bad which wouldn't require them to remove the blower.

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