Pic. 4.27. Connecting rod and piston group: 1 - Nut; 2 - Connecting rod cover; 3 - Lower connecting rod bearing; 4 - Piston and connecting rod; 5 - Upper connecting rod bearing; 6 - Top compression ring; 7 - Lower compression ring; 8 - Oil scraper ring; 9 - Piston pin; 10 - Piston; 11 - Connecting rod; 12 - Bolt