Piston Ring: Service and Repair

INSTALLING PISTON RINGS TO PISTON
When fitting piston rings to the pistons, use a piston ring clamp as illustrated. Test the piston rings by rotating them in their grooves. Check the clearance in several places. Lubricate the pistons and rings before assembly. Turn the compression rings so that the ring gaps are 180° apart and put them at 90° to the ends of the wrist pins. Also make sure that the spring gap in the upper and lower rings of the three-part oil-scraper ring are not aligned, see drawing.
^ I=From marking on piston head to timing side
^ 1=Upper compression ring
^ 2=Lower compression ring
^ 3=Steel strip ring (upper oil scraper ring)
^ 4=Center ring (oil scraper ring)
^ 5=Steel strip ring (lower scraper ring)