Yellow stuff on Valves?
 

Just getting ready to do a mini me, and on some of the valves on the head I bought, there is no carbon, just a ruff yellow substance. What is this? How did it get there? Is it anything to worry about?

RE: Yellow stuff on Valves?
 

crusty yellow stuff built up on valves can never really be a good sign, i just dont know what that sign is

RE: Yellow stuff on Valves?
 

Thanks for the comment.....but that doesn't help me much!

RE: Yellow stuff on Valves?
 

Anyone out there that can help???

RE: Yellow stuff on Valves?
 

picture? you shure its not just carbon build up? under certaint conditions carbon can become yellowish usually on the exhuast valves

RE: Yellow stuff on Valves?
 

Its just baked on carbon.

RE: Yellow stuff on Valves?
 

Might be carbon.....It is only on the valves marked A8. Any way to get it off without damaging the valves??