Quote:
Originally Posted by trademaster
I am on my third. Dropped valve the first time and spun bearing the second. These things happen when you track hard, but at this point my confidence in the ls7 isn't stellar. GM replaced the first because it happened on the highway, but I didn't try the second time because it was on track and that's not their responsibility. Blown motors on z06s are more common than most realize. It is still a cheaper option than any alternatives, but I wouldn't bet the farm on an ls7 being bullet proof on the track. It's a great engine for a lot of purposes, but my personal experience with durability hasn't been the best and I know others with similar, though less repetitive, experiences.
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I have seen a few go bad myself, dropped valve on one. I forget what killed the other one....they are definately not bullet proof.