44
cally operated thermostat and the shutters controlled by the
driver.
In cold weather, we recommend to encase the cooling system
for warmth-keeping.
The coolant temperature gauge located on the instrument
panel controls the temperature of coolant.
Besides this, the lamp with red light filter warns of coolant
overheating. The lamp goes on at the coolant temperature
between 91 and 98 °C for automobiles operating in regiones with
temperate climate, and at the coolant temperature between 102
and 109 °Ñ for automobiles operating in regiones with tropical
climate. When lighting the coolant temperature overheating
warning lamp, immediately determine and eliminate the cause
of overheating.
The rise of the coolant temperature may be caused by the
drop of coolant level in the radiator, loose tension of the fan belt,
faulty fan drive coupling, by movement of the automobile with
the closed shutters and with the closed valve of warmth-keeping
boot.
Adjust deflection of the fan belt (Fig. 37) by turning the
alternator. Normal deflection of the belt equals 8-14 mm with
an effort of 4 kgf (37 N) applied to it.
When using water as a coolant, periodically remove from the
cooling system scale and dirt by flushing them with a fast jet of
clean water. Flush the engine separately from the radiator so that
rust, scale and sediment from the engine cooling jacket do not
clog the radiator (Fig. 38). Prior to flushing the engine, remove
the thermostat.
Fig. 37. Checking Fan Belt
Tension
Fig. 38. Flushing Cooling System
