Originally Posted by
rias5037
The entire piston is black, is that ok, if it does have any negative impact on the engine, then i wil leave it they way it is.
the entire piston is black? Surely the side is still silver?
Like everyone is saying, if the gunk is not excessive on top, just leave it as it is - it shouldnt harm your engine but if you can pick it off with your finger or something else soft, just wipe it off with a clean rag or similar.