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Blown engine??? Post up

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Old 07-12-2015, 12:06 PM
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0NORCAL-SS
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Default Blown engine??? Post up

If your engine has blown please post it. I for one had mine blow but seems like we have a few others. I'm just getting a count because seems like some on this forum are making it sound like way more than there really is. To date I've been told by the team that took my car back 13 engines out of like 8k plus z06s made


so heres the list
1) NORCALSS
2) lawdogg149
3)walhan_qtr
4) zrace2
5) car tested in magazine

Last edited by NORCAL-SS; 07-15-2015 at 02:11 PM.
Old 07-12-2015, 09:29 PM
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lawdogg149
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Originally Posted by NORCALSS
If your engine has blown please post it. I for one had mine blow but seems like we have a few others. I'm just getting a count because seems like some on this forum are making it sound like way more than there really is. To date I've been told by the team that took my car back 13 engines out of like 8k plus z06s made
I was #1. The 13 sounds about right. I wasn't really #1 because when dealer called into GM tac they said i was lucky the car before mine only had 4 miles on it. Im still believing it has something to do with the crap for AC delco oil the factory fills with. Then my dealer forced me to use the crap and 1 week later motor let go. Two weeks later the memo comes out to change to mobil 1 at 500 miles.
Old 07-12-2015, 10:38 PM
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lawdogg149
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My additional question.

Have we seen a hand built Zo7 engine blow yet? All i remember so far have been the mass produced engines in the zo6
Old 07-12-2015, 10:56 PM
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schaibaa
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I've seen a few Z07s.
Old 07-12-2015, 11:18 PM
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Arctic Blastoff
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Originally Posted by NORCALSS
If your engine has blown please post it. I for one had mine blow but seems like we have a few others. I'm just getting a count because seems like some on this forum are making it sound like way more than there really is. To date I've been told by the team that took my car back 13 engines out of like 8k plus z06s made
Ive only seen 5
Old 07-13-2015, 01:01 AM
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0NORCAL-SS
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My car was a z07

so heres the list
1) NORCALSS
2) lawdogg149
Old 07-13-2015, 01:08 AM
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Bill Dearborn
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There is little difference between the production methods for the hand built engines and the production ones other than where they are built and a few assembly details. In most cases they use identical tooling. If the so called production assemblies make any increased use of automation that would tend to make them a little less likely to have build issues. Robots don't make mistakes like humans do.

Bill
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Old 07-13-2015, 08:42 AM
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Originally Posted by Bill Dearborn
There is little difference between the production methods for the hand built engines and the production ones other than where they are built and a few assembly details. In most cases they use identical tooling. If the so called production assemblies make any increased use of automation that would tend to make them a little less likely to have build issues. Robots don't make mistakes like humans do.

Bill
Old 07-13-2015, 08:56 AM
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Mr. Gizmo
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Originally Posted by Fastmikefree
I agree to. I would prefer the engine build by robots.
Old 07-13-2015, 08:58 AM
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jklein7
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Default Reason for Blown engines?

Was there any explanation as to what happened? Lawdogg said oil issue? Have to question that not using Mobil 1 can blow an engine! Really. Did you guys race the car before 1500 miles or do any tinkering with the engines?
Old 07-13-2015, 09:13 AM
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punky
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Originally Posted by Bill Dearborn
There is little difference between the production methods for the hand built engines and the production ones other than where they are built and a few assembly details. In most cases they use identical tooling. If the so called production assemblies make any increased use of automation that would tend to make them a little less likely to have build issues. Robots don't make mistakes like humans do.

Bill
Excellent point! There are many on this and other forums who have some gross misconceptions regarding the "hand built" engine thing. Lets not forget that the high tech digitally slaved precision assembly machine wasn't sucking on a crack pipe or had a fight with its wife before work. Human error and variability are everywhere. Automation eliminates this weak link in the chain.
Old 07-13-2015, 09:52 AM
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mjpcowboy
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The Z07 motor uses just as much automation the difference is not as many people involved in the assembly one person responsible through the process of the build
Old 07-13-2015, 10:21 AM
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docf
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Originally Posted by Mr. Gizmo
I agree to. I would prefer the engine build by robots.
The question regarding who built the blown engines has not been answered. Of the supposed 13, so far I see 2 on this post, both built by an individual. The most recent blown which was driven by the press also appear to have been a Z07 thus again built by an individual. I too would opt for an automated build, not only for engines, but paint etc.
Old 07-13-2015, 11:15 AM
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Anyone else on this forum have a blown engine? Or links to the names. I think was a few
Old 07-13-2015, 01:14 PM
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Originally Posted by docf
I too would opt for an automated build, not only for engines, but paint etc.
Isn't the paint (with all the issues) automated now?

If I get another Vette I will have to do the plant tour btw

OP, bump and sorry to get off topic.....
Old 07-13-2015, 01:23 PM
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LATrafficJam
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You know the new 2016 Cadillac CTS-V uses the same engine as the Z06? Slightly detuned, but same engine. Theirs aren't the hand built ones, and they only run automatics.

You might want to check their forums and see if they know of any engine issues there, too, since you want to capture the universe of blown engines of the same type.

Just a thought.
Old 07-13-2015, 01:29 PM
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Well if it is 10 engines of 10,000 pretty low. .001 percent! Sounds like no worry unless of course you have unlucky and landed in the .001 and some of those 10 we don't
know but a few could have abused the car too much too early.

We know cars with 37 miles on the odo have been to the strip with all out passes at 37 miles. That one didn't fail yet.

These cars have coatings on the bearing's that needs a proper breakin for best results. The 500 mile break in oil is fine. Is not a issue.

There is no issue that I see so far. I do think the 1lt has oilling issues
the lt4 is better in my book

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Old 07-13-2015, 01:32 PM
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gonabite
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Originally Posted by LATrafficJam
You know the new 2016 Cadillac CTS-V uses the same engine as the Z06? Slightly detuned, but same engine. Theirs aren't the hand built ones, and they only run automatics.

You might want to check their forums and see if they know of any engine issues there, too, since you want to capture the universe of blown engines of the same type.

Just a thought.
GM has not even built one CTS V for the consumer yet. Builds start Next Monday. Also the engines aren't "detuned" they have more restrictive exhaust manifolds thus the loss of 10 HP.

I have one on order and the ZO6 forum is the only thing keeping me informed on the LT4s!! Cant wait.

OP, unfortunately I don't think you will get all or even close to all the documented blown LT4s. As Im sure your aware not all Z06 owners are on this forum. And forget about asking GM they wont give you that answer.

I really think it just came down to quality control and metal filings they were not cleaned out properly after the machining of the crank shaft oil galleys and so on. At least I hope.

If its the human error of the "hand built" engines I still find that hard to believe as all the tools they use for torquing things are pre set air tools.
Old 07-13-2015, 01:38 PM
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Originally Posted by gonabite
GM has not even built one CTS V for the consumer yet. Builds start Next Monday. Also the engines aren't "detuned" they have more restrictive exhaust manifolds thus the loss of 10 HP.

I have one on order and the ZO6 forum is the only thing keeping me informed on the LT4s!! Cant wait.

OP, unfortunately I don't think you will get all or even close to all the documented blown LT4s. As Im sure your aware not all Z06 owners are on this forum. And forget about asking GM they wont give you that answer.

I really think it just came down to quality control and metal filings they were not cleaned out properly after the machining of the crank shaft oil galleys and so on. At least I hope.

If its the human error of the "hand built" engines I still find that hard to believe as all the tools they use for torquing things are pre set air tools.
In the past the caddy received a engine similar but not exactly the same. Be a real change if they are the same.
Old 07-13-2015, 02:49 PM
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sushisean
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The heads blew on my Z07 2 weeks ago at Laguna Seca. Hopefully have the car back from the dealer this week unless some other issue comes up.


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