Audi 100

1982-1990 of release

Repair and car operation

Audi 100
+ 1.1. Controls and devices
+ 2. Technical characteristics
+ 3. Engines
- 4. Cooling system
   4.1. Replacement of a cooling liquid
   4.2. Replacement and thermostat check
   4.3. Removal and installation of the water pump
   4.4. Check and replacement of the gauge of inclusion of the electrofan
   4.5. Replacement of the gauge of temperature of a cooling liquid
   4.6. Removal and installation of a radiator of system of cooling
+ 5. An exhaust system
+ 6. The power supply system
+ 7. Transmission
+ 8. A running gear
+ 9. A steering
+ 10. Brake system
+ 11. A body
+ 12. An electric equipment


4.2. Replacement and thermostat check

If the engine overheats, and the radiator thus remains cold, it specifies in malfunction of the thermostat. If the faulty thermostat is constantly opened, the engine will not get warm to working temperature. In these cases the thermostat replace.

1. To merge cooling liquid (subsection 4.1 subitem 1-3 see).
2. To turn away bolts and to uncover (5) (fig. System of cooling of the four-cylinder engine see) or (16) (fig. System of cooling of the five-cylinder engine see) thermostat.
3. To take out from a cover a sealing ring.
4. To take out the thermostat from a nest.
5. To measure distance a. Then to heat up the thermostat in water. The beginning of opening of the thermostat approximately 87 With, the opening end – nearby 102 S.Posle heatings to measure distance A. At the serviceable thermostat the difference of distances A and a should be a minimum of 8 mm.
6. To replace a sealing ring of a cover of the thermostat (fig. System of cooling of the four-cylinder engine, fig. System of cooling of the five-cylinder engine see).
7. To establish the thermostat in a nest so that the marksman on a thermostat cross-beam has been directed downwards.
8. To establish a cover, to twirl bolts and in regular intervals to tighten the moment 10 Нм (1,0 кгсм).
9. To fill in a liquid in cooling system.