1 - radiator; 2 - temperature sensor; 3, 17, 20, 22 - hose; 5 - bolt (М6х25); 6 - thermostat in the housing; 7 - gasket; 3 - block head; 9, 13 - ring (20x3); 10 - heating hose; 11 - nut (M6); 12, 15, 16 - bolt; 14 - pipeline; 18 - heating pump; 19 - holder; 21 - air removal screw; 23 - timing cover; 24 - ring (68x5); 25 - engine pump; 26 - pulley; 27 - bolt (M6x16); 28 - nut (M6); 29 - expansion tank; 30 - tank cap
The replacement of the thermostat must be carried out in the following order. Drain the coolant, remove the fan casing and the fan drive clutch with the impeller.
Loosen clamps and disconnect hoses (arrows, see fig. 3.58) cooling systems from the thermostat housing (from the front side of the cylinder block).
Remove lug from engine (left, see fig. 3.61) his rise.
Mark bolts (4, see fig. 3.17) fixing the cover of the thermostat housing, because they have different diameters and lengths.
Check thermostat operation.
Before installation, clean the seating surfaces on the thermostat housing and cylinder head from dirt and traces of oil. Replace seal (7). When installing, tighten the thermostat housing mounting bolts to a torque of 1.0 kgf·m (10 Nm). Tighten the bolts (M8) fixing the engine lugs with a torque of 2.0 kgf·m (20 Nm). Replace gasket and tighten bolt (M 14x1.5) drain hole on the cylinder block with a torque of 25 Nm (2.5 kgf·m). Fill the engine cooling system and test drive.
Check the operation of the viscous coupling (by turning on the fan), whether the temperature has risen in the lower part of the radiator and whether the thermostat housing is sealed. If there is leakage, tighten the mounting bolts.