The proper way to install piston rings is with a ring spreading tool. Spiraling the rings on by hand distorts them, and compromises their ability to seal the bores. The first and second rings have dimples that help orient them. The dimpled side of the ring should always face upward. The goal is for the chamfered edge of the ring to face upward on the top ring, and downward on the second ring. Conversely, the oil rings can be installed in either direction.