hy this winter I gonna change some spec of my car new gearbox new cylinder head...

my engine was rebuild only 1620 miles ago

I took the cylinder head off
and saw that cylinder 1 and 4 are more dirty thath 2 and 3 ???why this




and I saw some scratch in 2 zylinder one scratch I can fell a little bit with my finger



whats about my new piston rings need to chang them again?...