LT6 engine failures/problems
Intermediate
Joined: Jul 2023
Posts: 26
Likes: 16
From: Arizona
I got added to the list today. around 700 miles. I get a lovely check engine light and the onstar notification about a critical 'engine and transmission' alert. luckily I was right next door to the chevy dealership. I noticed my exhaust sound was audibly quieter. it sounded similar to being in quiet mode with the baffles open. so I imagine I have not great news in my future. I find out more next week. I guess I'll be driving the trackhawk and trx a lot more.
Drifting
Joined: Mar 2020
Posts: 1,718
Likes: 150
From: Central Florida
Anyone else feel this sticky thread should be turned into a "C8 Z06 Problems" thread like the sticky in the C8 General forum, instead of one just for the LT6 which is seldomly used due to an extremely low failure rate so far? That was we can consolidate the various DCT discussions and other common threads that clutter the first page of this forum and have repetitive posts/info.
Drifting
Joined: Mar 2020
Posts: 1,718
Likes: 150
From: Central Florida
I got added to the list today. around 700 miles. I get a lovely check engine light and the onstar notification about a critical 'engine and transmission' alert. luckily I was right next door to the chevy dealership. I noticed my exhaust sound was audibly quieter. it sounded similar to being in quiet mode with the baffles open. so I imagine I have not great news in my future. I find out more next week. I guess I'll be driving the trackhawk and trx a lot more.
No tranny issues here; just a loud ticking coming from the left cam/follower bank. Scheduled for a Picoscan next Wednesday. (900+ miles).
Advanced
Joined: May 2023
Posts: 79
Likes: 49
pretty lame.Added video, but the tick is more pronounced in person as compared to the iphone microphone.
Last edited by Teslarosa; Jan 6, 2024 at 04:02 PM.
Burning Brakes
Joined: Oct 2013
Posts: 912
Likes: 897
From: Torch Lake Michigan
Im guessing it didn't fix it. Just picked up brand new 2024 Z06 built on 12/4/2023 - First 300 miles sounded great without any tickets - but I got a ticking noise started just around 300 miles on engine after 2nd day of ownership. Video attached - ticking sound is pretty damn annoying and its sounds like someone tapping over and over on your ear drums pretty lame.
Added video, but the tick is more pronounced in person as compared to the iphone microphone.
pretty lame.Added video, but the tick is more pronounced in person as compared to the iphone microphone.
Drifting
Joined: Feb 2023
Posts: 1,357
Likes: 1,120
Im guessing it didn't fix it. Just picked up brand new 2024 Z06 built on 12/4/2023 - First 300 miles sounded great without any tickets - but I got a ticking noise started just around 300 miles on engine after 2nd day of ownership. Video attached - ticking sound is pretty damn annoying and its sounds like someone tapping over and over on your ear drums pretty lame.
Added video, but the tick is more pronounced in person as compared to the iphone microphone.
pretty lame.Added video, but the tick is more pronounced in person as compared to the iphone microphone.
Thread Starter
Safety Car
Joined: Jun 2008
Posts: 3,806
Likes: 5,869
Cannot quite tell from your recording, but this does not sound like the valvetrain ticking the TSB is supposed to address. Characteristic of the problem engines is irregular tapping noise from one or both engine banks. Regular or rhythmic ticking is not typically symptomatic of a problem engine.
Drifting
Joined: Mar 2020
Posts: 1,718
Likes: 150
From: Central Florida
Don't confuse the pronounced cam follower ticking noise with injection noise. I had the picoscan done, a left bank cam follower was the issue and GM paid to have the TSB done. When completed, it improved somewhat, but it's still there.
If there's any doubt about the source of the ticking "noise" the picoscan will provide your answer.
If there's any doubt about the source of the ticking "noise" the picoscan will provide your answer.
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Advanced
Joined: May 2023
Posts: 79
Likes: 49
Don't confuse the pronounced cam follower ticking noise with injection noise. I had the picoscan done, a left bank cam follower was the issue and GM paid to have the TSB done. When completed, it improved somewhat, but it's still there.
If there's any doubt about the source of the ticking "noise" the picoscan will provide your answer.
If there's any doubt about the source of the ticking "noise" the picoscan will provide your answer.
Notably, this light tapping noise didn't occur until about 300 miles. Will get to the dealer in upcoming weeks or month (winter here in New York) to inspect. Best case scenario is that i'm just paranoid
Le Mans Master
Joined: Jul 2013
Posts: 5,191
Likes: 3,388
From: Morrill Nebraska
Drifting
Joined: Mar 2020
Posts: 1,718
Likes: 150
From: Central Florida
Thank you! I just read through the whole TSB for the LT6 engine tick fix which may or may not require to remove the entire engine and powertrain to adjust the camshaft per the TSB. Hopefully picoscan shows nothing wrong, but searching around it seems the noise is just a nuisance and many have it last year also. I found the TSB video they recommend which shows what the 'tick' or 'tapping' : https://www.youtube.com/watch?v=Mcf2drXRqw0
Notably, this light tapping noise didn't occur until about 300 miles. Will get to the dealer in upcoming weeks or month (winter here in New York) to inspect. Best case scenario is that i'm just paranoid
Notably, this light tapping noise didn't occur until about 300 miles. Will get to the dealer in upcoming weeks or month (winter here in New York) to inspect. Best case scenario is that i'm just paranoid
Here's a tip from my experience with a local dealer (mine was a 11/23 museum delivery)) who hasn't worked on LT6's and with the more knowledgable LT6 owners: They're learning on your car. Let your service writer know up front you want to see the before to confirm AND the after Picoscans as well as a picture of the teardown. It is part of the service bulliten. Just say'n...
Last edited by GatorsJMC; Jan 10, 2024 at 07:36 AM.
Advanced
Joined: May 2023
Posts: 79
Likes: 49
My "ticking" was very notable after a cold start in weather mode in general from the cockpit, but could CLEARLY be heard by listening closely by each of the rear fender wells. It didn't get much better after warm up. No doubt it was coming from the left bank, which the picoscan graphed out. Just wished the TSB fix was better than a 50-60% reduction in noise intensity,- but it's noticeably better and I'll take it!
Here's a tip from my experience with a local dealer (mine was a 11/23 museum delivery)) who hasn't worked on LT6's and with the more knowledgable LT6 owners: They're learning on your car. Let your service writer know up front you want to see the before to confirm AND the after Picoscans as well as a picture of the teardown. Just say'n...
Here's a tip from my experience with a local dealer (mine was a 11/23 museum delivery)) who hasn't worked on LT6's and with the more knowledgable LT6 owners: They're learning on your car. Let your service writer know up front you want to see the before to confirm AND the after Picoscans as well as a picture of the teardown. Just say'n...
Instructor
Joined: Dec 2016
Posts: 208
Likes: 148
From: North Georgia Mountains- Florida Winters
I'm following a 2023 Z06 1LZ on Bring a Trailer and some guy who claims to work at a Chevy dealer in the body shop and wrote that he has seen 5 Z06s come thru the dealer with holes blown in the engines supposedly from over revving when cold. I would think if one dealer actually had that come through their service dept it would be all over the internet. I wanted to PM him but there is no way to contact someone who makes a comment, and I did want to call him out in the comment section. So far no one else has called him out either.
Drifting
Joined: Feb 2023
Posts: 1,357
Likes: 1,120
I'm following a 2023 Z06 1LZ on Bring a Trailer and some guy who claims to work at a Chevy dealer in the body shop and wrote that he has seen 5 Z06s come thru the dealer with holes blown in the engines supposedly from over revving when cold. I would think if one dealer actually had that come through their service dept it would be all over the internet. I wanted to PM him but there is no way to contact someone who makes a comment, and I did want to call him out in the comment section. So far no one else has called him out either.
Thread Starter
Safety Car
Joined: Jun 2008
Posts: 3,806
Likes: 5,869
I'm following a 2023 Z06 1LZ on Bring a Trailer and some guy who claims to work at a Chevy dealer in the body shop and wrote that he has seen 5 Z06s come thru the dealer with holes blown in the engines supposedly from over revving when cold. I would think if one dealer actually had that come through their service dept it would be all over the internet. I wanted to PM him but there is no way to contact someone who makes a comment, and I did want to call him out in the comment section. So far no one else has called him out either.
Melting Slicks
Joined: Aug 2000
Posts: 3,429
Likes: 972
From: Overland Park KS
I'm following a 2023 Z06 1LZ on Bring a Trailer and some guy who claims to work at a Chevy dealer in the body shop and wrote that he has seen 5 Z06s come thru the dealer with holes blown in the engines supposedly from over revving when cold. I would think if one dealer actually had that come through their service dept it would be all over the internet. I wanted to PM him but there is no way to contact someone who makes a comment, and I did want to call him out in the comment section. So far no one else has called him out either.
Melting Slicks
Joined: Jun 2013
Posts: 2,598
Likes: 1,593
I called this individual out in the mildest, and most polite fashion possible, and so did another poster...
It's one thing to BS a little bit on web forums, but when somebody is trying to sell a $100K car, it is incumbent upon any poster to be very clear on their facts... you are playing with somebody's money
It's one thing to BS a little bit on web forums, but when somebody is trying to sell a $100K car, it is incumbent upon any poster to be very clear on their facts... you are playing with somebody's money
Instructor
Joined: Dec 2016
Posts: 208
Likes: 148
From: North Georgia Mountains- Florida Winters
I called this individual out in the mildest, and most polite fashion possible, and so did another poster...
It's one thing to BS a little bit on web forums, but when somebody is trying to sell a $100K car, it is incumbent upon any poster to be very clear on their facts... you are playing with somebody's money
It's one thing to BS a little bit on web forums, but when somebody is trying to sell a $100K car, it is incumbent upon any poster to be very clear on their facts... you are playing with somebody's money
Burning Brakes
Joined: Aug 2019
Posts: 1,189
Likes: 1,002
From: Toronto, Canada
I saw "Carguy101"s comments on BAT and if you look at his history he's a serial commentator on loads of auctions on BAT. I highly doubt he's even seen 1 failure as seeing 5 would represent a high percentage for any given dealer let alone production numbers. I sense BS...
