Audi A3

since 1997 of release

Repair and car operation

Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
- Systems of cooling, heating
   - System of cooling of the engine
      Antifreeze – means of protection from freezing
      Replacement of cooling liquid
      Removal, installation and thermostat check
      Removal and radiator and fan installation
      Removal and installation of the pump of cooling liquid
      Check of system of cooling under pressure
      Check of a thermoswitch of the fan of cooling
   + Systems of ventilation, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema

Removal, installation and thermostat check

REMOVAL

The thermostat is in a final branch pipe of cooling liquid in front on the block of cylinders.

PERFORMANCE ORDER

1. Merge cooling liquid.
2. Unscrew 2 bolts of fastening–1–and remove a connecting branch pipe–2–from the pump of cooling liquid. Collect following liquid. A branch pipe with the attached hose take aside.
	3. Remove the thermostat-4-and a sealing ring–3–. For this purpose turn the thermostat on 90 ° (1/4 turns) to the left and take out.
CHECK
4. Measure the size (and) at the thermostat.
	5. Heat up the thermostat in water. Thus the thermostat should not concern vessel walls.
6. Check the thermometer temperature of the beginning and the completion of opening on compliance to requirements of Specifications
	7. After heating of the thermostat to temperature + 100°С the size (b) in comparison with the size (and) should be more on 7 mm. The course from the beginning before the completion of opening of the thermostat should be not less than 7 mm.
INSTALLATION
8. After heating of the thermostat to temperature + 100°С the size (b) in comparison with the size (and) should be more on 7 mm. The course from the beginning before the completion of opening of the thermostat should be not less than 7 mm.
9. Establish into place the thermostat.
ATTENTION At the engine of 1.8 l the thermostat insert and turn on 90 ° (1/4 turns) to the right. Provision of installation: The collar of fastening of the thermostat should settle down vertically.
10. Grease a new sealing ring with cooling liquid and insert.
11. Fix a connecting branch pipe the moment of 15 N of m.
12. Fill system with cooling liquid.
13. On the engine of 1.8 l (AGU) with the conditioner: Fix the conditioner compressor with effort of 45 N of m and establish a ridge belt.
14. Check cooling system on tightness.