Coolant Level And Density Check; Cambelt Removal And Refitting; Cooling System - Vaz 21213 Repair Manual

Fig.9-19. Engine support:
1 - left-hand bracket retaining pin; 2 - engine mounting rubber; 3 - right-hand
bracket /rubber assembly; 4 - bracket with rear engine support mounting; 5 - pin;
6 - bolt; 7 - rear engine support cross-piece

Cooling system

Design description
The cooling system is of closed-, pressurized type, with
expansion tank (Fig.9-20).
The coolant pump is of centrifugal type, driven by a V-belt
from the crankshaft pulley.
The cooling system includes radiator 7 with expansion tank 5,
thermostat 13, coolant temperature gauge, water jacket and con-
necting hoses.
During engine operation, water, warmed up in the water jack-
et, through the drain pipe flows to the radiator or thermostat,
depending on the thermostat valve position. Then water is sucked
by the pump and returned to the water jacket.
Fig.9-20. Cooling system:
1 - expansion tank vapour discharge pipe; 2 - expansion tank cap; 3 - engine
vapour discharge hose; 4 - radiator delivery hose; 5 - expansion tank; 6 - radi-
ator vapour discharge pipe; 7 - radiator; 8 - top radiator mounting rubber; 9 -
electric fan blower; 10 - bottom mounting rubber; 11 - return hose; 12 - filler
hose; 13 - thermostat
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The cooling system is fitted with a built-in double-acting ther-
mostat, the valve opening temperature is 83°ë.
Coolant - level and density check
With the cold engine (15-20°ë) the level of water in the
expansion tank must be 25-30 mm above the «MIN» mark.
WARNING. It is recommended to check the water level on
the cold engine, since on heating up water expands, so the
fluid level can rise significantly on the warm engine.
When necessary, use areometer to check the coolant densi-
3
ty to be 1.078-1.085 g/cm for íÓsÓl Ä-40.
When the level in the expansion tank is below the norm, while
the density exceeds the value required, add distilled water. In
case of normal density top up the coolant of the same grade as
the coolant in the cooling system.
Coolant change
Observe the following procedure when changing coolant:
- set the heater controls in the position «heating»;
- undo the caps in the bottom radiator cooler and cylinder
block, remove the expansion tank cap and drain coolant through
two drain holes. Detach the expansion tank and lift it over the
radiator, then remove the coolant remainder from the expansion
tank;
- to flush the cooling system, fill the system with clean water,
start the engine and run it until the radiator bottom cooler is warm.
With engine idling, drain water through the drain holes, stop the
engine and let it cool;
- repeat flushing steps as described above;
- after flushing refit the caps and fill the system with new
coolant 25-30 mm above the «MIN» mark on the expansion tank;
Fill coolant through the filler neck of the expansion tank. Refit
the cap, start the engine and allow it to idle for 1.5-2 minutes.
Stop the engine and when necessary top up coolant.
Cambelt - removal and refitting
The cam removal procedure is as follows (Fig.9-21):
- remove covers 3, 5 Ë 6 of valve timing mechanism;
- fix the flywheel using tool OUT0000049;
- loosen the crankshaft pulley retaining bolts;
- remove the crankshaft pulley;
- fix the flywheel with tool OUT0000015;
- secure the camshaft and fuel pump pulleys with retaining
bolts (the bolts should be hand tightened only);
- loosen nut 2 and bolt 4 (Fig.9-22);