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LT6 engine failures/problems

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Old Apr 28, 2023 | 10:12 AM
  #181  
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Originally Posted by AzDave47
With the C8Z in the garage, I start it up buckle up, wait the ~30 seconds for the exhaust to quiet and then open the garage door and drive off..
You start the car with the garage door closed?! What if you get an important phone call/text and forgot to open the garage door, very considerate to the neighbor but be very careful as all you need is that one time!

I actually do the same thing, with the garage door closed I stand near the exhaust and remote start it to hear the exhaust, then open the garage door in the garage or in the car. But I am thinking about changing that cause what if I tripped and knock myself out in the garage, got an important phone call etc and forgot, chances of those especially knocking myself out is very small but all I need is that one time and the result is for sure deadly.

(Maybe I will open the garage door 1/3 way up or soemthing, gotta hear that exhaust from the outside!!!!)
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Old Apr 28, 2023 | 10:38 AM
  #182  
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Originally Posted by RapidC84B
Video on FB group showing a prominent ticking that isn’t injector.

https://www.facebook.com/groups/9810...ibextid=ykz3hl


It's definitely not normal, but it is not completely continuous. Might be something very minor (like a loose butterfly valve), or more sinister. We don't know how it changes with temperature or higher rpms. It's a task for the Chevrolet service technician to find out.
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Old Apr 28, 2023 | 03:54 PM
  #183  
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Originally Posted by okaythen
You start the car with the garage door closed?! What if you get an important phone call/text and forgot to open the garage door, very considerate to the neighbor but be very careful as all you need is that one time!

I actually do the same thing, with the garage door closed I stand near the exhaust and remote start it to hear the exhaust, then open the garage door in the garage or in the car. But I am thinking about changing that cause what if I tripped and knock myself out in the garage, got an important phone call etc and forgot, chances of those especially knocking myself out is very small but all I need is that one time and the result is for sure deadly.

(Maybe I will open the garage door 1/3 way up or soemthing, gotta hear that exhaust from the outside!!!!)
I usually open the garage door, call a tow truck, haul the car to a remote location, start it with witnesses, then drive it slowly and methodically to starbucks.
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Old Apr 28, 2023 | 08:38 PM
  #184  
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Originally Posted by GM Bureaucrat
Starbucks is lame, go to an independent coffee shop and support a local business.


https://www.corvetteforum.com/forums...nvertible.html
https://www.corvetteforum.com/forums...post1596290236
https://www.corvetteforum.com/forums...er-sports.html
https://www.corvetteforum.com/forums...it-my-bad.html
https://www.corvetteforum.com/forums...sion-tank.html
https://www.corvetteforum.com/forums...ale-trade.html
https://www.corvetteforum.com/forums...p-2-tires.html
https://www.corvetteforum.com/forums...ft-on-z06.html

Unfortunately for me, that's only 1/3 of the threads where I have made the starbucks joke reference. It's obvious I need some new material.
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Old May 7, 2023 | 11:06 AM
  #185  
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Many of us who have owned cars with a FPC expected to see some failures. The draw of this engine is the very cool sound. Problem is, to get that sound you have to "beat" on the engine by revving it high. Of course that habit may expose any imperfections in the build quality of the engine.

It's a big catch 22 albeit a very fun one.
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Old May 7, 2023 | 11:17 PM
  #186  
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Originally Posted by Wyldfyer
Many of us who have owned cars with a FPC expected to see some failures. The draw of this engine is the very cool sound. Problem is, to get that sound you have to "beat" on the engine by revving it high. Of course that habit may expose any imperfections in the build quality of the engine.

It's a big catch 22 albeit a very fun one.
So true..

Last edited by CDNZR; May 7, 2023 at 11:27 PM.
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Old May 12, 2023 | 11:01 PM
  #187  
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Hope it’s nothing serious…
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Old Jun 17, 2023 | 11:15 PM
  #188  
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No more problems? Hmmmm seems like there are like ticking noise????
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Old Jun 26, 2023 | 08:43 PM
  #189  
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Your zo6 does not have the new LT6, this thread is specific to the new 2023 z06
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Old Jun 26, 2023 | 08:54 PM
  #190  
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Originally Posted by olief345
I had my C8 Z06 for 10 years and 20,000 miles and didn't have a SINGLE engine problem!!!
The C8Z first model year is 2023, Chevy started working on it about 2015, so I guess you went into the future and brought it back to 2013 with you. That post was not a great way to introduce yourself to the C8 Z06 forum.

Perhaps you had a C6Z?
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Old Jun 26, 2023 | 10:05 PM
  #191  
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Originally Posted by olief345
I had my C8 Z06 for 10 years and 20,000 miles and didn't have a SINGLE engine problem!!!
You must park it close to your DeLorean
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Old Jun 30, 2023 | 12:52 PM
  #192  
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Anyone see that GM released a TSB addressing the ticking noise? I glossed over it but didn’t drill into details. I did see that in certain instances the drivetrain has to be dropped to do the fix. 😳 Unfortunately mine has a loud tick. 😒
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Old Jun 30, 2023 | 01:05 PM
  #193  
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Originally Posted by Number 9
Anyone see that GM released a TSB addressing the ticking noise? I glossed over it but didn’t drill into details. I did see that in certain instances the drivetrain has to be dropped to do the fix. 😳 Unfortunately mine has a loud tick. 😒
Anyone have a link to the TSB?
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Old Jun 30, 2023 | 01:49 PM
  #194  
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I couldn’t link it but you can find it on the other forum.
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Old Jun 30, 2023 | 02:58 PM
  #195  
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Coupe they can fix it engine in, HTC they think they have to drop the engine to get the cam cover off.
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Old Jun 30, 2023 | 03:34 PM
  #196  
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Originally Posted by RapidC84B
Coupe they can fix it engine in, HTC they think they have to drop the engine to get the cam cover off.
I read the TSB differently. Looks like for both the coupe and HTC the engine and drivetrain must be removed to service the passenger side. Looks like you can't get the passenger side cam cover off with the engine installed. I wonder how loosening the cam bearing bolts and re-torqueing them guarantees that that realigns the caps. How is that different than what they did at the factory? If it is a torqueing issue, there could potentially be concern that the caps will "loosen" with time and miles. I guess time will tell.
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Old Jun 30, 2023 | 03:47 PM
  #197  
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Originally Posted by mfain
I read the TSB differently. Looks like for both the coupe and HTC the engine and drivetrain must be removed to service the passenger side. Looks like you can't get the passenger side cam cover off with the engine installed. I wonder how loosening the cam bearing bolts and re-torqueing them guarantees that that realigns the caps. How is that different than what they did at the factory? If it is a torqueing issue, there could potentially be concern that the caps will "loosen" with time and miles. I guess time will tell.
that’s false… a couple of people have had the fix engine in.
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Old Jun 30, 2023 | 03:51 PM
  #198  
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Originally Posted by RapidC84B
that’s false… a couple of people have had the fix engine in.
I read it the same way as mfain. Maybe those people had the noise originating from the driver’s side. Which is kinda of puzzling. First step is to identify which side the noise is coming from. What if it’s both sides? 🤷‍♂️
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Old Jun 30, 2023 | 03:53 PM
  #199  
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Originally Posted by RapidC84B
that’s false… a couple of people have had the fix engine in.
Here is a quote from the TSB. As far as I can tell, the TSB doesn't specify coupe or HTC.

"Once it is determined which bank the noise is coming from, it will be necessary to follow the service
procedure below to adjust the camshaft cap torque.
Important: If the noise is heard from the left bank, the camshaft cap adjustment procedure can be
done with powertrain in vehicle. If the noise is heard coming from the right bank, it will
be necessary to drop the engine and transmission assembly to gain access and remove
the camshaft cover for the adjustment procedure".

This from the other Corvette forum:
"The TSB also provides a list of parts that may be needed, as well as the service time needed to make the repairs. For the Left Bank, that time is 6.6 hours for Convertibles and 9.9 hours for Coupes. If it’s the Right Bank, service can take 16.6 hours for the convertible and 17.3 hours of the Coupe."

As an aside, I just did the subjective procedure that determines which side the ticking comes from (warm the engine and listen to both sides - no tools used). I am pleased to report that my engine sounds like a well-oiled sewing machine from start to operating temperature.

Last edited by mfain; Jun 30, 2023 at 04:13 PM.
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Old Jun 30, 2023 | 08:25 PM
  #200  
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A FB acquaintance is taking his HTC back to engineering in MI and they’re trying to see if they can do it engine in. Issue is getting the room to get the cam cover off.
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