Audi A4, S4

since 2000 release

Repair and operation of the car



Audi A4, S4
+ Introduction
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
- Cooling systems, heating and air conditioner
   + Cooling system
   + Systems of ventilation, heating and air conditioning
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment




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Cooling systems, heating and air conditioner

Specifications

Separate characteristics are provided also in the text of the Head and in case of obligation of their performance are highlighted in bold type.

Characteristic

Value

Design

Thermosiphon with the bladed water pump. Thermostatic adjustment. With a separate broad tank. The fan with the electric drive, joins and switched off from the control unit

Cooling liquid

mix of soft water and antifreeze (1:1), at such structure is provided frost resistance to –35 °C

Antifreeze

"G 012 A8D" (red color) or another, VW/AUDI-TL-774-D meeting standard, for example "Glysantin-Au-Protect/G30". It is allowed to apply "G12" (TL-VW-774-F) of lilac color. G12-lila antifreeze (lilac) can mix up with G12-rot antifreeze (red). On the 8-cylinder engine - only "G12 Plus"

The volume of system during the replacing, l

Characteristic

Value

The petrol

  • engines of 1.6 l

6.5

  • l engines 1.8 and 2.0

7.0

  • engines of 2.4 l

8.5

  • engines of 3.0 l

9.0

  • engines of 4.2 l
12.2

The diesel

  • engines of 1.9 l
7.5
  • engines of 2.5 l
9.0

Composition of cooling liquid

Characteristic

Value

Antifreeze share in cooling liquid for ensuring frost resistance

to -25 °C

40%

to -35 °C

50%

to -40 °C

60%

Characteristic

Value

Pressure in system

About 1.2 atm. (the exact size is specified on a cover of a broad tank). The cover has to maintain pressure within two minutes.

Thermostat

Characteristic

Value

Valve stroke

not less than 8 mm

Beginning of opening

87 °C

Full opening

102 °C

Stopper of a broad tank

Characteristic

Value

The valve of excessive pressure opens, atm.

1.4-1.6

On a cover pressure of opening of the valve is specified in atm. x 100. If, for example, on a cover costs "140/200", it is about a two-level cover and pressure of opening of the valve makes 1.4 and 2.0 atm.

Conditioner coolant

Characteristic

Value

Type

R134a (do not use R12)

Volume, gr.

480-530

Refrigerator oil

Characteristic

Value

Type

G 052 300 A2

Volume, cm 3

180±10

Efforts of a tightening of threaded connections, Nanometer

The moments of a tightening of fixture are given also in the text of the Head and on some illyustratsiyakh*.

* The moments of a tightening highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately.

Characteristic

Value

Water pump

L engines 1.6, 1.8, 2.0, 3.0

15

Engines of 2.4 l

10

Diesel engines of 2.5 l

10












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