Does your LS3....
Instructor
Joined: Mar 2018
Posts: 162
Likes: 26
From: Green Bay WI
Hmm, mine sounds somewhat like that, and at first it sounded like piston slap, but as the revs increased it does seem like it might be a mechanical issue like a lifter or valve spring, maybe? I'd pop the valve cover and look around.
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Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
I think mostly what I’m hearing is coming from the passenger side. I’ve pulled that valve cover before and everything looked fine but I think I’ll do it again because I believe it has got louder. The cylinder 2 and 8 lifters are louder than the rest so maybe there’s an issue there.
Drifting
Joined: Jul 2011
Posts: 1,821
Likes: 442
From: Boca Raton Florida
5-6 years ago i developed a noisy lifter. I ended up putting cdl engine cleaner an flush in the engine, driving it for 100 miles and doing a oil change after. That cleaned up the gunk stuck in the lifter and my noise went away immediately. It was a cheap fix.
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Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
I have Pennzoil platinum in her right now but was thinking of going with Amsoil sig series anyway
Race Director
Joined: Jul 2005
Posts: 12,030
Likes: 3,566
From: Central MO
Never heard of that particular cleaner, but yeah I was thinking about dumping some Rislone or Seafoam into the crankcase and maybe even some fuel system cleaner into the gas tank.
I have Pennzoil platinum in her right now but was thinking of going with Amsoil sig series anyway
I have Pennzoil platinum in her right now but was thinking of going with Amsoil sig series anyway
Last edited by BadAV; Nov 13, 2020 at 06:34 AM.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
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Burning Brakes
Joined: Jul 2002
Posts: 1,127
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From: Nova Scotia
I would say mine sounded similar to your driver side. Kind of sounds like there's something more going on on the passenger side. I didn't use a stethoscope, but to the naked ear mine sounded even across the engine. Hard to know for sure in a video, but yours sounds like one cylinder is worse
Racer
Joined: Sep 2019
Posts: 488
Likes: 206
From: Indy `O=o-
2020 C6 of the Year Finalist - Unmodified
I’m just lurking in this thread for now just to follow the prevalence of this issue and possible causes.
I have a ‘12 GS w 35k and mine does not make any noises besides the normal exhaust rumble.
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Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
I would say mine sounded similar to your driver side. Kind of sounds like there's something more going on on the passenger side. I didn't use a stethoscope, but to the naked ear mine sounded even across the engine. Hard to know for sure in a video, but yours sounds like one cylinder is worse
I bought some Rislone oil treatment tonight and gonna try it and see if it clears anything up. My passenger side has been noisiest since I bought it (which was only back in June)
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
So that distinct tick on the passenger side, what do you guys think that sounds like? Lifter? Tapping valve? I was hoping it would be simple like a loose plug but all were tight and the manifold bolts are also tight.
Last edited by bwill03z; Nov 15, 2020 at 10:35 PM.
Cruising
Joined: Oct 2020
Posts: 13
Likes: 0
I bought a 12' base and have a really noisy cold engine that follows RPM (only quiets down once I get to full operating temps), and sewing machine kind of tick that follows RPM's once it's warmed up.
Have tried good oil and seafoam in the fuel tank... Have not yet checked on manifold bolts or injectors, or had a stethoscope passover.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
Any updates on this?
I bought a 12' base and have a really noisy cold engine that follows RPM (only quiets down once I get to full operating temps), and sewing machine kind of tick that follows RPM's once it's warmed up.
Have tried good oil and seafoam in the fuel tank... Have not yet checked on manifold bolts or injectors, or had a stethoscope passover.
I bought a 12' base and have a really noisy cold engine that follows RPM (only quiets down once I get to full operating temps), and sewing machine kind of tick that follows RPM's once it's warmed up.
Have tried good oil and seafoam in the fuel tank... Have not yet checked on manifold bolts or injectors, or had a stethoscope passover.
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
I have a 2011 GS LS3 that has a 'Heartbeat' supercharger on it ... The heads and cam are stock.
No ticking sound when I had the stock 1.7 ratio rocker arms in the engine, and no ticking sound now that I have installed a set of Comp Cams 1.8 ratio roller rocker arms.
In 2 more weeks, I am installing an aftermarket cam in the engine ... I have no idea if that will make the valve train noisy (certainly hope not).
Attachment 48331317
No ticking sound when I had the stock 1.7 ratio rocker arms in the engine, and no ticking sound now that I have installed a set of Comp Cams 1.8 ratio roller rocker arms.
In 2 more weeks, I am installing an aftermarket cam in the engine ... I have no idea if that will make the valve train noisy (certainly hope not).
Attachment 48331317
Safety Car
Joined: Aug 2017
Posts: 4,921
Likes: 2,334
From: Etobicoke (Toronto) Ontario
I don’t know if I mentioned it previously in the thread or not but I had my lifters replaced with GM LS7 lifters as well as CHE rocker trunnions awhile back and That did quieten down the motor overall to some degree but it did not resolve the ticking completely. The passenger side sounds nice and smooth at idle now but the driver side still has an isolated tick once warmed up. It’s pretty quiet on a coldstart other than a small amount of piston slap but once the oil gets hot the driver side up near cylinder one has a distinct ticking noise that follows RPMs and I can hear it in the cab with the windows up and radio off. As much as I would like to chalk this up to normal LS3 noises I found metal shavings in my oil when I removed my valve covers. Also I cut open my oil filter and they were metal shavings in there as well. So obviously something is going on that is abnormal. It sucks because these motors are inherently noisy and they all take to some degree and make the sewing machine noise so it makes it really difficult to diagnose any abnormal valvetrain noises.
Last edited by FatsWaller; Oct 22, 2021 at 04:11 PM.
Cruising
Joined: Oct 2020
Posts: 13
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I don’t know if I mentioned it previously in the thread or not but I had my lifters replaced with GM LS7 lifters as well as CHE rocker trunnions awhile back and That did quieten down the motor overall to some degree but it did not resolve the ticking completely. The passenger side sounds nice and smooth at idle now but the driver side still has an isolated tick once warmed up. It’s pretty quiet on a coldstart other than a small amount of piston slap but once the oil gets hot the driver side up near cylinder one has a distinct ticking noise that follows RPMs and I can hear it in the cab with the windows up and radio off. As much as I would like to chalk this up to normal LS3 noises I found metal shavings in my oil when I removed my valve covers. Also I cut open my oil filter and they were metal shavings in there as well. So obviously something is going on that is abnormal. It sucks because these motors are inherently noisy and they all take to some degree and make the sewing machine noise so it makes it really difficult to diagnose any abnormal valvetrain noises.
Yeah, I've had my oil changed a few times and no metal shavings at all..... I think it's all healthy, but the cold engine is specifically very noisy.. The ticking I just kinda noticed the other day.
If anyone wants to hear what the engine sounds like: IMGur Video
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
You did mention you were thinking about it, but not that it was done..
Yeah, I've had my oil changed a few times and no metal shavings at all..... I think it's all healthy, but the cold engine is specifically very noisy.. The ticking I just kinda noticed the other day.
If anyone wants to hear what the engine sounds like: IMGur Video
Yeah, I've had my oil changed a few times and no metal shavings at all..... I think it's all healthy, but the cold engine is specifically very noisy.. The ticking I just kinda noticed the other day.
If anyone wants to hear what the engine sounds like: IMGur Video
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,174
Likes: 259
From: Virginia
Have read several threads where the lifter turned and the ticking noise was caused by the cam lobe getting ground down. Metal filings were a symptom. Here is an example https://www.corvetteforum.com/forums...r-failure.html Unfortunately there are others. IIRC this cost @cgladish an engine.
Cruising
Joined: Oct 2020
Posts: 13
Likes: 0
My motor sounds exactly like this when cold and goes away when warmed up. That is piston slap and nothing to worry about, very common on LS motors. That’s not really a ticking noise but more of like a hollow knocking sound, but yea every LS car I’ve owned did that until the motor warmed up.
I do also have a tick, but have not been able to record it or investigate.. just kinda noticed it recently.
Appreciate the response 🙂