[jeb532]

Never seen this in 40 years of building engines...is this a subie "feature". Exhaust valve tips look normal.

http://s561.photobucket.com/albums/ss57/5322009/?action=view¤t=intake1.jpg

 

[upflying]

Looks like galling from the rocker arm/cam follower due to lack of maintenance or lack of oil. Why did you have to tear into the engine?

 

[4wheeldog]

All the intakes, or just one? It looks like something got caught in there. If it is all of them, looks like a lubrication failure. Why the oil would fail has many possible answers. I have seen that exactly once before, in a motorcycle engine, one valve only.

 

[FOX-]