Engine noise help please. 2018 SS manual

N00bmaster · 05-12-2026, 08:07 AM

My car got loud for a second at high RPM yesterday (not sure if I bounced off the limiter) and now it seems there’s ticking that wasn’t there before. Any help would be appreciated. Am I imagining it?

Here’s a video with some RPM’s.
https://youtube.com/shorts/0HJawKGHP...cdluyjmrvmHsEC

bishopts · 05-12-2026, 08:12 AM

Definitely been there. Hopefully you're mechanically inclined. Otherwise it's about to get really expensive

arpad_m · 05-12-2026, 08:50 AM

Uh-oh... that isn't a good sound, unfortunately. Your engine needs professional help.

vince3 · 05-12-2026, 08:55 AM

Loud at high rpm - what exactly does this mean? I hear typical LT1 noise in your video.

Dynamical · 05-12-2026, 09:08 AM

Sounds a little more than the typical LT1 though. Could be exhaust leak, lifter, spring, loud DI or how about this.....what exactly were you doing when "car got loud for a second at high RPM" ??? Did you miss a shift? You say "not sure if I bounced off the limiter" Hmmm....Did you bend a pushrod Mr.??? Time to take the valve covers off or bring it to a mechanic. Maybe put a mechanics stethoscope on it first if you wanna poke around with it.

KingLT1 · 05-12-2026, 09:33 AM

Sounds like you have a lifter starting to go south.

DeuceCam · 05-12-2026, 11:55 AM

You'd know if you hit the limiter, because all throttle is cut off by the ecu and the rpm's drop; it's very abrupt/startling (I don't like it). You can't 'bounce off' the limiter like on some other cars, unfortunately. However, I've never over-revved from a downshift, so I don't know what would happen in that situation.

bishopts · 05-12-2026, 01:26 PM

Quote:

Originally Posted by DeuceCam

You'd know if you hit the limiter, because all throttle is cut off by the ecu and the rpm's drop; it's very abrupt/startling (I don't like it). You can't 'bounce off' the limiter like on some other cars, unfortunately. However, I've never over-revved from a downshift, so I don't know what would happen in that situation.

I ran mine to 7400 rpm when i ran 3rd gear out and wasnt paying attention to how quickly it starts accelerating after 4000. It was when in first got my car. I bent a valve on cylinder 5. But also 2 pushrods.
Buying the head was cheaper than machine work plus valves. It was like $360 with valves from GM. Took about 4 hours to replace. The hardest part was getting the header out.

bishopts · 05-12-2026, 03:17 PM

Pull the valve cover and inspect the rocker arms and pushrods. See if they have slack. Its pretty easy to do. For the most part it's a 10mm socket to do it all.

JT6Speed · 05-12-2026, 04:26 PM

Quote:

Originally Posted by bishopts

I ran mine to 7400 rpm when i ran 3rd gear out and wasnt paying attention to how quickly it starts accelerating after 4000. It was when in first got my car. I bent a valve on cylinder 5. But also 2 pushrods.
Buying the head was cheaper than machine work plus valves. It was like $360 with valves from GM. Took about 4 hours to replace. The hardest part was getting the header out.

Wow what's the rev limiter then?

N00bmaster · 05-12-2026, 04:27 PM

Just called a shop and they said I’d be looking at around $2800 if it’s lifter. ��

bishopts · 05-12-2026, 04:41 PM

Quote:

Originally Posted by JT6Speed

Wow what's the rev limiter then?

7000. It was before i had even looked into the tune. I moved it to 6600. My guess is the momentum it built was faster than its response. The freeze frame data for the miss was 7400.

KingLT1 · 05-12-2026, 05:51 PM

Quote:

Originally Posted by bishopts

I ran mine to 7400 rpm when i ran 3rd gear out and wasnt paying attention to how quickly it starts accelerating after 4000. It was when in first got my car. I bent a valve on cylinder 5. But also 2 pushrods.
Buying the head was cheaper than machine work plus valves. It was like $360 with valves from GM. Took about 4 hours to replace. The hardest part was getting the header out.

It must have been tuned then because the rev limiter on these cars stock is 6600rpm.

bishopts · 05-12-2026, 06:04 PM

Quote:

Originally Posted by KingLT1

It must have been tuned then because the rev limiter on these cars stock is 6600rpm.

Yea it was setup for e85 when i got it

05-12-2026, 08:07 AM	#1
N00bmaster Drives: 2018 Chevy Camaro 2SS Join Date: Dec 2024 Location: Massachusetts Posts: 14	Engine noise help please. 2018 SS manual My car got loud for a second at high RPM yesterday (not sure if I bounced off the limiter) and now it seems there’s ticking that wasn’t there before. Any help would be appreciated. Am I imagining it? Here’s a video with some RPM’s. https://youtube.com/shorts/0HJawKGHP...cdluyjmrvmHsEC

05-12-2026, 08:50 AM	#3
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 13,476 View My Garage	Uh-oh... that isn't a good sound, unfortunately. Your engine needs professional help. __________________ 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

05-12-2026, 08:55 AM	#4
vince3 Drives: 2022 Vivid Orange LT1-M6 Join Date: Dec 2015 Location: Houston TX Posts: 466	Loud at high rpm - what exactly does this mean? I hear typical LT1 noise in your video. __________________ 2022 Vivid Orange M6 LT1 - 2" ARH headers with cats and offroad setup (full system,), 3" ARH Pure Thunder mufflers, ported MSD intake, Soler 95mm tb, Rotofab CAI, E85 flex fuel, tuned by Jason@snackbartuning, Forgestar D5 18x8 fronts with 245/40/18 and Forgestar D5 17x10 rears with 275/40/17 summer tires. Old car 2016 M6 SS - MSD intake, Rotofab, 2" ARH headers with cats, E85 with EFI Tuning. Best ET: 11.7@122mph

05-12-2026, 09:08 AM	#5
Dynamical Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015 Location: new england Posts: 651	Sounds a little more than the typical LT1 though. Could be exhaust leak, lifter, spring, loud DI or how about this.....what exactly were you doing when "car got loud for a second at high RPM" ??? Did you miss a shift? You say "not sure if I bounced off the limiter" Hmmm....Did you bend a pushrod Mr.??? Time to take the valve covers off or bring it to a mechanic. Maybe put a mechanics stethoscope on it first if you wanna poke around with it. __________________ *2022 Camaro LT1 A10 - Drag Pack/Corsa double X pipe/AWE track axleback -11.849@118.67MPH/1.798 60'*

05-12-2026, 09:33 AM	#6
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,665	Sounds like you have a lifter starting to go south. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

05-12-2026, 08:12 AM	#2
bishopts Drives: 2017 2ss 6mt Join Date: Mar 2024 Location: dallas Posts: 1,610	Definitely been there. Hopefully you're mechanically inclined. Otherwise it's about to get really expensive

05-12-2026, 11:55 AM	#7
DeuceCam Drives: LT1 Join Date: Apr 2024 Location: AZ Posts: 332	You'd know if you hit the limiter, because all throttle is cut off by the ecu and the rpm's drop; it's very abrupt/startling (I don't like it). You can't 'bounce off' the limiter like on some other cars, unfortunately. However, I've never over-revved from a downshift, so I don't know what would happen in that situation.

05-12-2026, 03:17 PM	#9
bishopts Drives: 2017 2ss 6mt Join Date: Mar 2024 Location: dallas Posts: 1,610	Pull the valve cover and inspect the rocker arms and pushrods. See if they have slack. Its pretty easy to do. For the most part it's a 10mm socket to do it all.

05-12-2026, 04:27 PM	#11
N00bmaster Drives: 2018 Chevy Camaro 2SS Join Date: Dec 2024 Location: Massachusetts Posts: 14	Just called a shop and they said I’d be looking at around $2800 if it’s lifter. ��

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