08-23-2022, 11:42 AM | #1 |
Drives: Camaro Join Date: Apr 2021
Location: Miami
Posts: 105
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ZL1 exhaust leak? Metallic sound at cold start
Does anyone has a similar issue? Metallic “tsss-tss-tsss” sound, coming from the front of the car, so not the exhaust flaps rattle. It is most pronounced at cold start, but also can be heard after car is warmed up, for example at lower rpm’s when rolling from stand still. My car did not have this sound from factory, and it appeared at around 3K miles and a few track days I had. Any input would be appreciated before I go to the dealer and they say “it’s normal”. Car is fully stock.
https://youtube.com/shorts/OT4NLEKHWBg?feature=share |
08-23-2022, 11:45 AM | #2 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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Yep. Both my 21 and my 18 did that. Goes away after a few minutes as it warms up.
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08-23-2022, 11:49 AM | #3 |
Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: Gapplebees
Posts: 3,092
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The valvetrain and injectors are a little noisy in these cars, the valvetrain noise gets quieter though as the engine warms up some.
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08-23-2022, 11:50 AM | #4 |
Drives: Camaro Join Date: Apr 2021
Location: Miami
Posts: 105
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It does go away but not entirely. My car is a manual and when I apply clutch to start moving at lower revs - it still can be heard after car is warmed up. Are you sure it’s the engine and not the exhaust? Any idea how to eliminate this sound?
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08-23-2022, 12:12 PM | #5 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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08-23-2022, 12:27 PM | #6 |
Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: Gapplebees
Posts: 3,092
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Is the exhaust stock? If so, its not an exhaust leak.
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08-23-2022, 12:42 PM | #7 |
Drives: Camaro Join Date: Apr 2021
Location: Miami
Posts: 105
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All stock. And this sound was not present when car was new, appeared at like 3K miles…
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08-23-2022, 12:49 PM | #8 |
Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: Gapplebees
Posts: 3,092
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08-23-2022, 01:45 PM | #9 |
Drives: Chevrolet Camaro ZL1 1LE Join Date: Oct 2021
Location: NY
Posts: 702
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My F-150 does that. Took me forever to figure out what it was. I ended up taking the truck in for routine service and the chief mechanic said that I had a warped manifold.
When it heats up and the metal expands it goes away. When cold, you can hear the valves loud and clear. He said it wasn't urgent for me to fix it but just for my awareness that this is what it was. I wonder if you have something similar going on. |
08-23-2022, 07:00 PM | #10 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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My ZL1 does it too and some other strange noises until it warms up.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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08-23-2022, 09:04 PM | #11 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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08-24-2022, 04:54 AM | #12 |
Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 4,978
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08-24-2022, 06:34 AM | #13 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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Well Thank you very much!
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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08-24-2022, 09:12 AM | #14 | |
Drives: Camaro Join Date: Apr 2021
Location: Miami
Posts: 105
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Quote:
If it’s normal, then car would have this sound straight from factory, however it did not. So what you’re saying is BS. I bought my car new and know exactly how it was. If it’s common for this sound to appear later or after tracking the car - that is another issue and good to know! |
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