Cooling system:
A - until August 1979; B - since August 1979; C - on model cars «323i» release from April 1981
1 - water pump; 2 - pump roller; 3 - retaining ring; 4 - impeller; 5 - stuffing box; 6 — a persistent sealing ring of an epiploon; 7 — laying of the case of the water pump; 8 - flange; 9, 20 - water pump drive pulley; 10 - radiator; 11 - expansion tank; 12 - plug of the expansion tank; 13 - drain tube; 14 - connecting pipe; 15 - fan switch on sensor; 16 - electric fan; 17 - fan; 18 - clutch; 19 — fan mounting flange; 21 - thermostat housing; 22 - thermostat; 23 - thermostat cover; 24 - purge screw; 25 - thermal time relay («323i»); 26 - thermoelectric switch; 27 - thermoelectric switch 0°C (on «323i» from model year 1981); 28 - oil cooling pipes (on vehicles with automatic transmission).