Damage caused by broken pieces of the plug that went into the valve and damaged it
 

1. On #@ 3 combustion chamber 2 combustion exhaust valves are damaged.

2. These valves are not burn

3. There are pieces broken off

4. The rest of the still look good

5. The #3 spark plug electrode and neck are broken off

Conclusion: Th e damage was caused by the the broken pieces of the plug that went into the valve.

Has any body reported such a scenario whereby this damage is a human or mechanical error.
The car is still under warranty can I hold anybody accountable for this damage

What type of car is this? Mini Cooper?

Do you have any pics?

Thanks, :beer:

If its under warranty and you followed the proper maintenance schedule i think you should be covered.

I see it all the time on turbocharged hyundais also evo x seem to do the same thing. Likely cause by detonation. Poor fuel quality, carbon build up,