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jmackisback · 02-20-2020, 10:18 AM

Hi folks. I have a 2019 ZL1 that has what I can only describe as metal on metal grinding noise that I can hear on moderate acceleration. It's not incredibly loud by any stretch, but it's noticable. Here's the kicker... with the stock air box on the sound is not producible. With the aftermarket intake on, it is clear as day. This has me worried that it is an engine issue as opposed to a NPP valve or wheel bearing issue (just brainstorming).

Any thoughts?

02-20-2020, 10:18 AM	#1
jmackisback Drives: 2019 Camaro ZL1 Join Date: May 2017 Location: Vancouver Posts: 154	Alarming noise... input? Hi folks. I have a 2019 ZL1 that has what I can only describe as metal on metal grinding noise that I can hear on moderate acceleration. It's not incredibly loud by any stretch, but it's noticable. Here's the kicker... with the stock air box on the sound is not producible. With the aftermarket intake on, it is clear as day. This has me worried that it is an engine issue as opposed to a NPP valve or wheel bearing issue (just brainstorming). Any thoughts? __________________ 1987 Camaro V6 1988 Camaro IROC Z 1993 Camaro Z28 1999 Camaro SS 2017 Camaro SS