I was replacing head gaskets and when I was cleaning the surface of the passenger side I noticed some little divits, I looked closer at it and the cylinder it came off(#4) and the piston had a little something stuck to it, it came right off. The cylinder wall also had a slight line in it, i could barely feel it with my finger nail, do you think this will be ok to put the heads back on??? Or do I need to tear it down???? Thanks Bryce