Pic. 2-67. Lubrication system: 1 - oil supply channel to the main bearing; 2 - oil supply channel from the main bearing to the connecting rod; 3 - oil filter bypass valve; 4 - paper filter element; 5 - anti-drainage valve; 6 - oil pump; 7 - channel for supplying oil from the pump to the filter, 8 - horizontal channel in the cylinder block for supplying oil from the filter to the oil line; 9 - channel in the cylinder block for supplying oil to the pump drive gear and ignition distributor; 10 - oil supply channel to the oil pump drive shaft and ignition distributor, 11 - oil pump drive shaft and ignition distributor; 12 - channel in the driven sprocket for supplying oil to the chain; 13 - camshaft; 14 - annular groove on the middle bearing journal of the camshaft; 15 - channel in the camshaft cam, 16 - channel in the camshaft bearing journal; 17 - vertical channel in the cylinder block for supplying oil to the gas distribution mechanism; 18 - oil line; 19 - electric oil pressure indicator sensor and oil pressure warning lamp sensor