Audi A4, S4
Introduction
Controls and receptions of safe operation
Current leaving and service
The engine
- Systems of cooling, heating and the air conditioner
   - Cooling system
      The general information
      Antifreeze - a protection frame from freezing
      Replacement of a cooling liquid
      Removal and thermostat installation
      Thermostat check
      Replacement of hoses of system of cooling
      Removal and radiator installation
      Removal and installation of the fan of a radiator
      Removal and installation of the pump of a cooling liquid
    Systems of ventilation, heating and air conditioning
Power supply systems, release and decrease in toxicity of the fulfilled gases
Systems of an electric equipment of the engine
Manual box of a gear change
Automatic transmission
Coupling, power shafts and differential
Brake system
Suspension bracket and steering
Body
Onboard electric equipment




Removal and thermostat installation

The diesel engine of 1.9 l

At cars with the system of the cooling working under the set characteristic, the usual thermostat is absent.

Removal

 PERFORMANCE ORDER

    Merge cooling liquid.
    Disconnect the bottom hose of a cooling liquid from a connecting branch pipe (2). Preliminary open a collar and completely shift it back.
    Turn out bolts (1) and remove a connecting branch pipe with the thermostat (4).
    Turn the thermostat on 90 to the left and take out from a connecting branch pipe.

Installation

 PERFORMANCE ORDER

    Necessarily replace consolidations and sealing rings. Clear sealing surfaces. Insert the thermostat (4) with a new sealing ring (3) into a connecting branch pipe (2) and turn on 90 to the right.

Thermostat collars should stand almost vertically.

    Insert a connecting branch pipe with the thermostat into the block of cylinders and fix its moment 15Нм. Fill system with a cooling liquid, address to Section Check of the engine by means of the vacuum gauge.