Audi 100

1982-1990 of release

Repair and car operation

4. Cooling system

THE GENERAL DATA

System of cooling of the four-cylinder engine

1 – the heat exchanger of cooling of oil of automatic transmission; 2 – a collar; 3 – a hose bringing a radiator; 4 – a sealing ring of a cover The thermostat; 5 – a thermostat cover; 6 – the thermostat; 7 – the case of the water pump; 8 – a lining; 9 – a cover of the water pump; 10 – the platen of the water pump; 11 – a pulley of the water pump; 12 – a fan casing; 13 – a radiator casing; 14 – an arm; 15 – the rubber plug; 16 – the gauge of inclusion of the fan; 17 – a sealing ring of the gauge; 18 – the electrofan; 19 – a hose taking away a radiator; 20 – a radiator; 21 – the top rubber plug;

22 – the top casing of a radiator; 23 – пароотводящий a hose; 24 – a stopper Broad tank; 25 – a broad tank; 26 – a hose from a tank to a radiator; 27 – a sealing ring of the water pump; 28 – a thermoswitch automatic заслонки; 29 – a branch pipe of a shirt of cooling; 30 – the gauge of temperature of a cooling liquid; 31 – the gauge of inclusion of the fan; 32 – a lining; 33 – a branch pipe of selection of a liquid in a heater; 34 – a tube plum of a liquid from a heater; 35 – a hose taking away the heat exchanger; 36 – a hose bringing the heat exchanger

System of cooling of the five-cylinder engine

1 – a fan casing; 2 – the electrofan; 3 – a broad tank; 4 – a tank stopper; 5 – a collar; 6 – a hose from a tank to a radiator; 7 – a radiator; 8 – the bottom casing of a radiator; 9 – the top casing of a radiator; 10 – пароотводящий a hose; 11 – the water pump; 12 – a sealing ring; 13 – a hose taking away a radiator;

14 – a branch pipe; 15 – a lining; 16 – a thermostat cover; 17 – the thermostat; 18 – a sealing ring of the thermostat; 19 – the gauge of inclusion of the electrofan; 20 – a hose bringing the thermostat; 21 – a tube of a supply of a liquid to a heater; 22 – a hose bringing a heater; 23 – a hose taking away a heater

The cooling system completely tight, consists of a radiator, the water pump, the thermostat, the broad tank, hoses connecting them and the electrofan. The radiator is established in front of the engine on cars with four-cylinder engines or sideways. With the five-cylinder. The system works as follows. While the engine cold, the thermostat is closed also a liquid circulates on a small circle, passing a radiator. When the liquid temperature reaches approximately 87 ° With, the thermostat starts to open, and a liquid. To circulate on the big circle through a radiator. The electrofan copes the gauge of deenergizing of the fan, located in the bottom part of a radiator. The fan joins at temperature of a cooling liquid 93–98 ° With, and is switched off at 88–93 ° With.

Capacity of system of cooling (with a heater) makes:

Four-cylinder engines	7,0 l
Five-cylinder petrol engines, except МС	8,1 l
Engines MS	8,5 l
Diesel engines without pressurisation	8,0 l
Diesel engines with pressurisation	9,4 l

To change cooling liquid it is recommended approximately in 2 years, and also at replacement of a radiator, the engine, a head of the block of cylinders, etc.