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After three weeks of head scratching and nail biting the engine saga is finally (hopefully) over. Final diagnosis: exhaust valve spring failure in the #1 cylinder causing the valve to break resulting in a cracked cylinder wall. The engine seized after coolant seeped into the cylinder, which explains the coolant in the oil pan. The entire engine was replaced under warranty.

The aftermarket CAI and/or PCM tune were not found to be at fault. Having said that, I received exceptionally good care from Mario (Service Manager) and Guy (Service Writer) at Val Ward Cadillac. While I’ve had minor issues with the Service Department in the past, they definitely came through when it counted and restored my faith in the dealership. I picked up the car yesterday and drove the 35 miles back to the house. It ran a little tight-- as would be expected from a new engine breaking in-- but it felt great to hear the rumble of the big LS6.

By the way, if you plan on replacing your stock engine, be prepared to spend about $12,000.
 

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Sandyfoot-V said:
After three weeks of head scratching and nail biting the engine saga is finally (hopefully) over. Final diagnosis: exhaust valve spring failure in the #1 cylinder causing the valve to break resulting in a cracked cylinder wall. The engine seized after coolant seeped into the cylinder, which explains the coolant in the oil pan. The entire engine was replaced under warranty.

The aftermarket CAI and/or PCM tune were not found to be at fault. Having said that, I received exceptionally good care from Mario (Service Manager) and Guy (Service Writer) at Val Ward Cadillac. While I’ve had minor issues with the Service Department in the past, they definitely came through when it counted and restored my faith in the dealership. I picked up the car yesterday and drove the 35 miles back to the house. It ran a little tight-- as would be expected from a new engine breaking in-- but it felt great to hear the rumble of the big LS6.

By the way, if you plan on replacing your stock engine, be prepared to spend about $12,000.
All's well that ends well. For curiosity, does that $12K estimate include labor?
 

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'04V, '05V, '06SRT8, '10V, '13ZL1, '12 V, '16 Z06 SC757
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I am so glad to hear this worked out for you. I was wondering and wondering but figured no posts meant you were still doing battle and didn't want to upset anything. A motor is about the only thing I haven't replaced and certainly hope not to. :lildevil:
 

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I'm glad it turned out well for you.

It seems very clear to me that the RIGHT thing happened, that being the engine replaced under warranty when it was determined that your mods did NOT cause the failure. Not only is this is the RIGHT answer, it's also the LEGAL one.

Shame on the many of you who seemingly mindlessly said Sandyfoot should bear the entire cost of the repair because she has some mods...give me a break. IT DEPENDS ON THE FACTS AND CIRCUMSTANCES OF THE SITUATION...

I still submit, however, that $12k is wholly insignificant to GM though...
 

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Glad to hear it worked out for you. I've been coming back to these pages waiting to hear the gory details. Thanks for filling us in.

Interesting "ethical" debate in the previous thread on this subject. Glad everything worked out in a legal, ethical manner. Good job.
 

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JBeechel said:
12K being wholly insignificant is why they lose a billion a quarter... lol
Hardly. I thought we already had this discussion on this board. First and foremost are their legacy costs, which has next to nothing to do with replacing CTS-V parts under warranty. Read their public filings and you'll see what I mean.
 

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I don't know why, but I just wish Slapshot would post more often.
 
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