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05-24-2025, 10:25 PM
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#1 |
 
Drives: 2021 Camaro LT1 m6 Join Date: May 2025
Location: Florida
Posts: 2
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Exhaust rattle
Hello everyone, I’m having some issues with my exhaust, it’s currently causing some rattle. Best way I can explain how it sounds like is like a thin sheet of metal hitting something. I’m going to be getting under the car tomorrow to see if I find the issue, I’m thinking it’s a heat shield maybe, not sure. Just wondering if anyone has experienced something alike? Thank you
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05-24-2025, 11:03 PM
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#2 |
            
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 13,476
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Hi LT1andro, does your car have the NPP exhaust (that comes with quad tips)? If yes, the rattle is likely to be caused by the exhaust valves, which is a known issue and has various remedies.
You will find TSBs on the valve rattle (early epoxy fix, lube fix, valve controller leg cutoff fix) and several threads here in the forums, let us know if you can't locate them though.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle Terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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05-25-2025, 10:13 AM
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#3 |
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Drives: 2021 Camaro LT1 m6 Join Date: May 2025
Location: Florida
Posts: 2
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Hey thanks for reaching out, but no i don’t have the npp exhaust. My current setup is 1 7/8 in long tube headers, leading to an x pipe to no muffler. You can only hear the rattle on idle, my guess is because of the cam the car shakes, something down there is loose and making that noise. it’s coming straight from under the cabin. I’ll be getting under a checking it out in a bit, hopefully nothing serious. Praying it’s just a screw loose or something to do with a heat shield. Thanks again
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05-25-2025, 03:00 PM
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#4 |
 Drives: 16’ Camaro 1SS Join Date: Jul 2020
Location: Mesa, Az
Posts: 37
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May not be the same case for you but my exhaust rattle came from this guy right here. ended just removing the bracket entirely.
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05-27-2025, 12:32 PM
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#5 | |
 Drives: 2019 Camaro 1SS1LE Join Date: Jan 2024
Location: Utah
Posts: 370
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Quote:
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2019 1SS1LE M6 Shadow Gray Metallic
ProCharger D1X Race Kit - 4.25" Pulley || GPI Pistons/Rods - ACL Bearings - ARP Hardware || LME Timing Chain Guide || Katech C5R Timing Chain || Katech OE Spec Billet Oil Pump || OE Ported Heads || CHE Trunnion Upgrade || BTR 220 Cam - BTR .660" Dual Springs - GM Racing "Caddy" Lifters - BTR 3/8" Pushrods (7.825") || ATI Balancer || LT4 Injectors || LT4 HPFP || JMS BAP || DSX Flex Fuel || LT2 Intake Manifold || LTH (Catless) || Stainless Works Redline Series NPP || 91 + 8oz Boostane 7/26/2024 Tuning in progress |
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