Can break a valve and drill the engine cylinder 2JZ GE being in power without accelerating in park?

Tiny
ALBERTO GOMEZ GARCIA DE LEON
  • MEMBER
  • 2001 LEXUS IS 300
  • 76,000 MILES
My car had a fault in the coils and the mechanic told me that at the end of change that when doing the tests having the engine running without speeding it broke a valve and the cylinder is drilled.
why did this happen?

Thanks for your attentions.
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Saturday, February 11th, 2012 AT 9:33 PM

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Tiny
HMAC300
  • EXPERT
Sometimes stuff happens and does this. It may have had a piece come out while doing testing.
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Saturday, February 11th, 2012 AT 9:36 PM

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