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
      General information
      Antifreeze - a security measure from freezing
      Replacement of cooling liquid
      Removal and installation of the thermostat
      Check of the thermostat
      Replacement of hoses of the cooling system
      Removal and installation of a radiator
      Removal and installation of the fan of a radiator
      Removal and installation of the pump of cooling liquid
   + 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

Removal and installation of a radiator



  1. Merge cooling liquid, address to the Section Replacement of Cooling Liquid.
  2. Remove a front bumper, address to the Section Removal and installation of a front bumper.
  1. Diesel engine of 1.9 l: Remove an air duct before a cooler of nadduvayemy air.
  1. Disconnect air ducts at the left and to the right of a radiator (an arrow on an accompanying illustration).
  1. Disunite the socket (1) relay of pressure of the conditioner.
  1. Disunite the socket (2) sensors of external temperature. (3) - bolts of fastening of the condenser.
  2. Take aside two electric wires.
  1. Engines 2.0, 3.0 of l (ALT, AWA, ASN): Disconnect a coil of hydraulic liquid of the hydraulic booster (3) and (4). (1) – plug of the sensor of low pressure; (2) – plug of the sensor of external temperature.

Do not open a contour of cooling of the conditioner. Danger of accident!

  1. Disconnect the condenser from a radiator (arrow).

For an exception of damages of the condenser, and also hoses/pipelines of cooling liquid watch that wires and hoses were not twisted, were not rumpled and were not bent.

  1. Incline carefully the condenser down and put it.
  2. L engines 2.4, 3.0: remove the left top cover of the engine.
  1. Disconnect a hose from a radiator for what remove a lock bracket at a connecting flange (the shooter on an accompanying illustration).
  1. Models with AT: Disconnect below and above from a radiator liquid pipelines for AT and close them.
  1. Disconnect a hose of cooling liquid at the top of a radiator for what release a lock bracket at a connecting flange (the shooter on an accompanying illustration).
  1. Release the top clips of a radiator and take out upward.
  1. Incline a radiator forward and take out from rubber support assembled with a ring of the fan and the fan.



  1. Replace worn-out rubber support on holders of a radiator.
  2. Installation is carried out in sequence, the return to removal.

If the radiator was replaced, it is necessary to replace all volume of cooling liquid.