Mechanics

CAN BREAK A VALVE AND DRILL THE ENGINE CYLINDER 2JZ GE BEING IN POWER WITHOUT ACCELERATING IN PARK?

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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Sometimes stuff happens and does this. It may have had a piece come out while doing testing.

Hmac300
Feb 11, 2012.


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