Warped Exhaust Valve

[Yoyocafe]

Anyone know what would cause the exhaust valve on a 3.0L warp like this?

 

[Explorin94]

That would be a burnt valve.

 

[srteach]

Anyone know what would cause the exhaust valve on a 3.0L warp like this?

HEAT. The commentor above is correct, it is called a burnt valve.

As to a more specific cause, running rich, bad plugs, over-revving the engine for extended period, basically fuel burning up as it exits the cylinder past the exhaust valve (think blowtorch on the valve).

 

[Rockstar04]

A plugged cat, or a faulty EGR valve can also cause burned valves.