Removal and installation of the thermostat of the cooling system operated on an algorithm. Audi A4 (from 2001 to 2005 release)
Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
2.1. General information
2.2. Predvaritlny checks
2.3. Mekhanichsky part (petrol engines 2,0l)
2.4. Lubrication system
2.5. Cooling system
2.5.1. Removal and installation of the thermostat of the cooling system operated on an algorithm
2.5.2. Check of the thermostat of the cooling system operated on an algorithm
2.5.3. Removal and installation of the water pump
2.5.4. Pressure testing of the cooling system
2.6. System of injection
2.7. System of production of the fulfilled gases
2.8. Mechanical part (petrol engines 3,0; 3,2 l)
2.9. Mechanical part (petrol engines of 4,2 l)
2.10. Mechanical part (diesel engines of 2,0 l)
2.11. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 







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2.5.1. Removal and installation of the thermostat of the cooling system operated on an algorithm

Removal

Fig. 2.43. Mass cable of joint stock bank


Disconnect a mass cable from joint stock bank at the switched-off ignition (fig. 2.43).

Fig. 2.54. Engine casing


Remove a casing of the engine (fig. 2.54).
Open a cover of a broad tank of the cooling system.

Fig. 2.44. Bolts of an exhaust pipe of an independent additional heater


In cars with an additional heater unscrew bolts of an exhaust pipe of an independent additional heater from the noise-insulating screen (fig. 2.44).

Fig. 2.45. Fastening of a forward noise isolation


Weaken quick disconnect couplings 1 and 2 and remove a forward noise isolation (fig. 2.45).
Merge cooling liquid.

Fig. 2.208. Electric socket of the sensor of pressure of oil


Disconnect the electric socket of 1 sensor of pressure of oil (fig. 2.208).
In addition disconnect a water hose from below on a water pipe 2 and merge the remained OZh.

Fig. 2.209. Extraction of an adsorber


Take an absorber with the connected hoses up in the direction from an arm from put aside (fig. 2.209).

NOTE
Before removal of a poliklinovy belt mark the direction of the course with chalk or a felt-tip pen. Change of the direction of the course of earlier operated belt can lead to its damage

Mark the direction of the course of a poliklinovy belt.

Fig. 2.64. Weakening of a poliklinovy belt


For weakening of a poliklinovy belt turn a tension damper (fig. 2.64).
Record a tension element with the help by a clamp.
Take off a poliklinovy belt.

Fig. 2.100. A tension damper of a poliklinovy belt with a suspended pad of the engine


Remove a tension damper of a poliklinovy belt with a suspended pad of the engine (fig. 2.100).
Remove the generator.
Disconnect the electric socket of 1 wire of the electromagnetic coupling of the compressor of the conditioner.

Fig. 2.67. Fastening of the compressor of the conditioner and shtekerny socket of a wire


Turn off the conditioner compressor from an arm (fig. 2.67).

Fig. 2.210. Water hose


Disconnect a water hose 2, having taken out a fiksatorny bracket of 1 (fig. 2.210).

Fig. 2.101. Bolts of fastening of an arm of additional units


Turn off fastening of an arm of additional units – bolts of 1-6 (fig. 2.101).
Disconnect the electric socket 1.

Fig. 2.211. Fastening of the thermostat


Remove the thermostat of the cooling system operated on an algorithm (fig. 2.211).

Installation
Installation is carried out in the return sequence.

NOTE
Replace a sealing ring of round section.

Clear or process a sealing surface for a sealing ring of round section.
Moisten a new sealing ring of round section with G12+ cooling liquid.
Establish an arm of hinged units.
Fill in cooling liquid.
Install the generator.
Install the conditioner compressor.
Establish poliklinovy a belt.
Connect the rechargeable battery.

Inhaling moments
The thermostat to the block of cylinders: 15 N · m.
Arm of additional units to the block of cylinders: 45 * N · m.
Natyazhitel of a poliklinovy belt to an arm of additional units: 23 N · m.
* Establish on a carving varnish.


2.5. Cooling system

2.5.2. Check of the thermostat of the cooling system operated on an algorithm