Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
- Systems of cooling, heating
   - System of cooling of the engine
      Antifreeze – a protection frame from freezing
      Replacement of a cooling liquid
      Removal, installation and thermostat check
      Removal and radiator and fan installation
      Removal and installation of the pump of a 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 release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes

Removal, installation and thermostat check

REMOVAL

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

PERFORMANCE ORDER

1. Merge cooling liquid.
2. Turn away 2 bolts of fastening–1 and remove a connecting branch pipe–2 from the pump of a cooling liquid. Collect a 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 () at the thermostat.
	5. Heat up the thermostat in water. Thus the thermostat should not concern vessel walls.
6. Check up the thermometer temperature of the beginning and the opening termination on conformity to requirements of Specifications
	7. After heating of the thermostat to temperature + 100°С the size (b) in comparison with the size () should be more on 7 mm. The course from the beginning before the termination 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 () should be more on 7 mm. The course from the beginning before the termination 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. Installation position: the Collar of fastening of the thermostat should settle down vertically.
10. Grease a new sealing ring with a cooling liquid and insert.
11. Fix a connecting branch pipe the moment 15 Н m.
12. Fill system with a cooling liquid.
13. On the engine of 1.8 l (AGU) with the conditioner: Fix the compressor of the conditioner with effort 45 Н m and establish a ridge belt.
14. Check up cooling system on tightness.

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