This concern with burnt valves is quite common on the 3.0l 12v Vulcan engine. Lets just say I have seen more often on this engine than any other engine we see in the dealership. I recently had one in that has this issue and I go over how to test them with simple tools so you know just where the leak is. I am currently doing head gaskets on this vehicle with those videos to come, in the mean time check it out it may be your problem if you have a misfire problem you just cannot seem to find......

 

Good video, Thanks