Crank mechanism parts: 1 - crankshaft; 2 - flywheel; 3 - connecting rod; 4 - piston; 5 - piston pin; 6 - piston rings; 7 - oil pump drive sprocket; 8 - crankshaft sprocket; 9 - crankshaft pulley; 10 - rear crankshaft oil seal; 11 - thrust rings; 12 - crankshaft main bearing shells.