GM To Fix 2023 Corvette Z06 LT6 Engine Ticking Noise
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General Motors unveiled the new 2023 Corvette Z06 in October of 2021, ushering in the next level of performance for the eighth-generation C8 Corvette lineup. The main party piece in the 2023 Corvette Z06 is the new naturally aspirated 5.5L V8 LT6 gasoline engine, however, some customers complain that their LT6 makes a loud ticking noise. Now, GM is issuing a fix for this issue.
According to General Motors, the issue can manifest as a ticking, tapping, or snapping noise from the engine on some units of the 2023 Corvette Z06. It’s unknown at this time how many units may be affected.
GM notes that the LT6 incorporates a mechanical valvetrain design and does not use traditional hydraulic lifters. As such, some mechanical ticking noise from the valvetrain is normal. However, the noise could become excessive and not periodic, which may be the result of misaligned camshaft caps.
The ticking noise may be heard when the engine is idling, and could become more noticeable with the rear engine hatch open and the vehicle in Tour mode. In addition, the noise may become more audible as the engine warms up to its normal operating temperature. A GM technician will use a PicoScope to verify the noise concern, both before and after the realignment procedure is performed.
For reference, the 2023 Corvette Z06’s naturally aspirated 5.5L V8 LT6 is rated at a maximum of 670 horsepower and 460 pound-feet of torque, with redline set at 8,600 rpm. Standout features include dual overhead cams and a flat-plane crankshaft, with an all-aluminum block, forged aluminum pistons, forged titanium connecting rods, an active split intake manifold, twin 87 mm throttle bodies, and a racing-inspired dry-sump oiling system.
Under the body panels, the 2023 Corvette Z06 rides on the GM Y2 platform, with production taking place exclusively at the GM Bowling Green plant.
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$147,000 for a bad engine build. Good grief GM.
OMG JWL.. At least they are fixing it and not letting it go like the old GM used to my LS1 in my old Camaro always had slight tick.and ummm 300,000 thousand dollar Lamborghini s and porches have major issues…. It’s a machine something is bound to go wrong…. Unfortunately the world is not Disney perfect. Oh I forgot one thing it’s a performance engine and right off the bat those are known for breaking.
GMQuality at its finest at build center! Ya Ya Ya
…..My C7 Chinalet Korbette is a marvel of inbreeding salted with an ever falling level of quality….the fact that a manufacturer blames its own customers for its failures is the tell heard “around the World!”…GM with rice is the true low point of auto manufacturing.. 2017 GS korbette
Sold out to China… committed to greed, corp. treason
Chinese Motors Corporation
I bought a new 2023 C8 stingray convertible with 3 miles on the clock I love the car but the ticking noise is not acceptable I have on the car 1000 miles at the moment, I paid close to $140000 for this car and I don’t think it is a normal noise! I would like to get a new car or get my money back. I live in LA area can someone recommend me a good lawyer for this problem?
Ford quality to MS Watchdog when the the turbo on your F150 decides to die for no reason… Please don’t get me started on all the trolls and haters… I have owned seven GM vehicles from sedans to SUVs and not one left me stranded on the side of the road expect my 96 Blazer which was 20 years old and needed a spider injector.we currently own a 2019 Buick enclave and a 2020 Chevy Equinox lt with the 2.0T…. IMO honest opinion GM has come a long way in quality they are right with Junkdai I mean Hyundai or even OMG TOYOTA! Now as I said before I don’t care if this engine is built out of gold, brass, and diamonds… And hand built it’s bound to have problems it a PERFORMANCE ENGINE… COME ON CHILDREN SAY PERFORMANCE ENGINE! They all have problems.
“LT6 incorporates a mechanical valve train design and does not use traditional hydraulic lifters”
It’s for maximum horsepower, hydraulics you lose a little power.
Solid lifters making a ticking noise? Who would have thought? OH, YEA, just us old guy who grew up when many cars had solid lifters are remember adjusting them in our backyards. The solution for the regular drivers was Hydraulic lifters.
GeorgeS actually it’s the high RPM that drove them to solids. Hydraulic lifters let the valves float at high RPM, when building a racing engine, we always replaced the Hy with solids.
I agree, for racing high performance you want solids but many do not know that solid lifters need an occasional adjustments. As stated by ED Jenks, I spent many hours in the drive way and learned from my dad when all six cylinders were solid lifter. Many valve cover gaskets were sold because of it.
A game my friends and I would play during hot summers days to be out of the sun. Sit in the porch and as a car drove down the street, and by the tappit noise of Ford’s, Chevrolet’s and Chrysler’s were distinctive we would challenge each other by naming the car before it went by. In the fifty’s and early sixty’s, about 90% were six cylinders. Late sixties V8’s became the main stream
GM’s biggest problem is they are building a “Track Car” that 95% will never see a track, and only 1% will be driven hard. So, things that work on the track can be a nuisance top street drivers.
I’m glad I purchased my C8 70th Anniversary last year. I now have 2,900 miles and I only heard the ticking sound once, when I was at about 700 miles after I jumped on it to hop on the freeway (I smoked the guy on the line to get onto the freeway).
After I turned it off to run into the Post Office, I have never heard it again.
robert,, get ready you will hear it again.. it will return like tinea, you cant get rid of it
you want to hear valve train noise? crank up a 1970 lt1 corvette or 1970 z28 baby that’s music to the ears
I bought a 2023 z51 c 8 3 weeks ago I have 500 miles on it! The lifter making a ticking noise it is not acceptable at all! I left the car to the dealer today I’ll give them a chance to fix it but till happen again I will no choice to sue then I wall want my money back. It was my dream car but can’t drive it with a motor sound of 1995 Toyota Corolla.