2015 Race Red Z/28 9700631 Gets a New Heart

[SIM GhostrdrZ]

Ok so this might be a stupid question or show my ignorance about the ls7. But if the block cracked then that should be coolant leaking. The only way oil would leak out of a cracked block is if a cylinder sleeve cracked allowing oil out of the cracked block as well. Before I purchased my Z, it had a #8 cylinder wall cracked and the reports said it was of course producing blue smoke but they never had notes on a crack in the block. I was worried about not having a numbers matching block but I don’t know if folks care about that as much as they do with the old school stuff.

[The_Raging_Bull]

Originally Posted by SIM GhostrdrZ

Ok so this might be a stupid question or show my ignorance about the ls7. But if the block cracked then that should be coolant leaking. The only way oil would leak out of a cracked block is if a cylinder sleeve cracked allowing oil out of the cracked block as well. Before I purchased my Z, it had a #8 cylinder wall cracked and the reports said it was of course producing blue smoke but they never had notes on a crack in the block. I was worried about not having a numbers matching block but I don’t know if folks care about that as much as they do with the old school stuff.

To your point, the pre-replacement warranty inspection (including some teardown) showed some oil-water mix.

As far as numbers matching, with many modifying their cars and others like me..bone stock ...so If someone wants my car it comes with a new $19000 LS7...again replaced by GM under warranty. What can I say?

BTW the neighbor (a mechanic at Graff Chevy in Grand Prairie TX) behind us in the 60's that lost his 67 tri-power L88 engine under warranty..it didn't affect the resale over the years..of course only 20 were built in 67.

[SIM GhostrdrZ]

Originally Posted by The_Raging_Bull

To your point, the pre-replacement warranty inspection (including some teardown) showed some oil-water mix.

As far as numbers matching, with many modifying their cars and others like me..bone stock ...so If someone wants my car it comes with a new $19000 LS7...again replaced by GM under warranty. What can I say?
BTW the neighbor (a mechanic at Graff Chevy in Grand Prairie TX) behind us in the 60's that lost his 67 tri-power L88 engine under warranty..it didn't affect the resale over the years..of course only 20 were built in 67.

Thanks for the info on both fronts.
That’s how I felt when I purchased my Z with the GM Warranty replaced LS7. It’s a factory race car and when things break, replace them and go on.
Good luck selling and thanks for sharing your story