Does your LS3....
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
Does your LS3....
I know LS3 motors tend to be noisy, as most LS motors are, but does your stock LS3 have the “sewing machine” light tick around 1500-2500 rpm’s? I know the Z06’s are notorious for it....and I know a lot of cam and header cars have it but I was surprised to hear it on my bone stock 2011. I really can only hear it with the windows up and radio off and it’s pretty noticeable.
I thought at first I had a loose rocker but everything checks out under the valve cover.
Just curious.
I thought at first I had a loose rocker but everything checks out under the valve cover.
Just curious.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
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From: Prosper TX/Austin TX
2020 C6 of the Year Winner - Modified
My previous ‘12 GS had it & it became more pronounced after I added longtubes. It was so loud that driving into my neighborhood that’s the sound you heard bouncing back off fences over the longtubes and Corsa Xtreme. I thought I had an exhaust leak it was so loud, but nope.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
My previous ‘12 GS had it & it became more pronounced after I added longtubes. It was so loud that driving into my neighborhood that’s the sound you heard bouncing back off fences over the longtubes and Corsa Xtreme. I thought I had an exhaust leak it was so loud, but nope.
i know LS motors are noisy and really it’s just the sound of power but damn if it ain’t annoying sometimes and can make ya paranoid.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
Since buying the car back in July I do think it has become slightly louder. Under the hood I don’t hear anything going on at idle that I would consider abnormal but the passenger side is a little bit noisier than the driver side. I popped the hood and had someone do a few revs and it sounds okay to me outside of the car but when driving at lower rpm’s with the windows up I hear a very audible ticking. Might just be LS sewing machine noise but I thought it was kinda loud to be stock
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From: Central MO
No ticking at all. The whole valvetrain is noisy on cold start but quiets down as soon as the oil starts to warm up a little. My 07 did exactly the same thing (and to a lesser extent, my 03), so I just chalk that up to GM's chosen components for the Corvette engine. The 5.3 in my 02 Avalanche never had the cold start valve train noise, although it started getting a little piston slap at 95k miles (75k miles of which was cammed and pullied down Magnacharged).
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
No ticking at all. The whole valvetrain is noisy on cold start but quiets down as soon as the oil starts to warm up a little. My 07 did exactly the same thing (and to a lesser extent, my 03), so I just chalk that up to GM's chosen components for the Corvette engine. The 5.3 in my 02 Avalanche never had the cold start valve train noise, although it started getting a little piston slap at 95k miles (75k miles of which was cammed and pullied down Magnacharged).
I had an 03 Z06 that ticked like hell too and drove me crazy.
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From: Central MO
What is your current car? I’ve heard a lot of cammed cars and cars with long tubes sound like mine, but I don’t know any that sound like mine that are bone stock. I’ thinking it’s noisy lifters but there’s a slight chance it’s exhaust related. I wish I could say mine had no ticking :/
I had an 03 Z06 that ticked like hell too and drove me crazy.
I had an 03 Z06 that ticked like hell too and drove me crazy.
Pro
Joined: Mar 2000
Posts: 669
Likes: 80
From: NE USA
Start with a mechanics stethoscope, pin point the source. What I discovered was the fuel injectors are very loud! Through the stethoscope the lifters and valves do have that LS sewing machine sound. However the LS3 injectors are on a different level.
I still find it irritating, but the car continues to deliver. I suspect GM knew this as they put insulation on the back sides of the fuel rail covers to temper the sound. Get a scope a probe around, see if you can zero in on the source.
I still find it irritating, but the car continues to deliver. I suspect GM knew this as they put insulation on the back sides of the fuel rail covers to temper the sound. Get a scope a probe around, see if you can zero in on the source.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
Start with a mechanics stethoscope, pin point the source. What I discovered was the fuel injectors are very loud! Through the stethoscope the lifters and valves do have that LS sewing machine sound. However the LS3 injectors are on a different level.
I still find it irritating, but the car continues to deliver. I suspect GM knew this as they put insulation on the back sides of the fuel rail covers to temper the sound. Get a scope a probe around, see if you can zero in on the source.
I still find it irritating, but the car continues to deliver. I suspect GM knew this as they put insulation on the back sides of the fuel rail covers to temper the sound. Get a scope a probe around, see if you can zero in on the source.
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
Thread Starter
Melting Slicks
Joined: Nov 2011
Posts: 3,164
Likes: 258
From: Virginia
I have the worst freaking luck with getting LS cars with noisy motors!