Vaz -21213 Repair Manual page 35

When the level in the expansion tank is below the value spec-
ified, while its density is in excess of that required, top up distilled
water.
When the density is as recommended, top up the correct
coolant of the same grade as that in the cooling system.
When the coolant density is below the value specified, while
the vehicle will be used in cold conditions, change the coolant.
Coolant change
Change coolant at the intervals recommended or after the
engine overhaul. Fill the cooling system, as described below:
- undo the radiator and expansion tank caps, open the heater
tap;
Fig.2-60. Engine cooling system:
1 - radiator return hose; 2 - thermostat; 3 - thermostat hose; 4 - return hose to pump; 5 - return pipe, heater radiator; 6 - delivery pipe, heater radiator; 7 - return hose
from intake manifold preheater to part throttle channel heater; 8 - part throttle channel heater; 9 - expansion tank; 10 - coolant temperature sensor; 11 - hose between
radiator and expansion tank; 12 - radiator feed hose; 13 - left-hand fluid cooler; 14 - radiator cap; 15 - radiator matrix; 16 - fan ring; 17 - radiator drain tap; 18 - radia-
tor mounting rubber; 19 - right-hand fluid cooler; 20 - water pump; 21 - feed hose to pump
- disconnect the heater hose (top) from the union on the vehi-
cle body;
- pour coolant (10.7 litre) to the radiator (up to the upper filler
edge) until it starts flowing from the hose and heater union;
- reconnect the heater hose with the union and refit the radi-
ator cap. Top up the remaining coolant into the expansion tank,
refit and tighten the filler cap;
- to remove air pockets, start the engine, run it idle until the
coolant temperature reaches the temperature of the thermostat
opening (80±2)°C. Check to see the radiator inlet and return
pipes are hot.
Leave the engine to cool and check the coolant level. When
the level is below that required, while there are no evident sys-
tem leaks, top up coolant as necessary.
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