Audi A4

since 1994 release

Repair and operation of the car



A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
- Cooling system
   So there is a cooling
   Check of level of cooling liquid
   Antifreeze check
   Check of the cooling system on tightness
   Radiator
   Locking cover of the cooling system
   Thermostat
   The help at malfunctions
   Water pump
   Maple belt of the water pump
   Various models of fans
   Viscous fan
   The radiator fan with the electric drive
   Violations in operation of the fan of a radiator
   The help at malfunctions
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Maple belt of the water pump

At the six-cylinder engine the drive of the water pump is provided with a gear belt – here everything has to be as it should be.

In a different way the situation is at the four-cylinder engine: this engine never has to be started without maple belt and, therefore, without drive of the water pump! Otherwise you risk to sustain heavy damage of the engine.

Cold water is heavier hot. It and without water pump slowly circulates via the engine and a radiator. This thermosiphon and independently circulating cooling is not enough for modern engines. More detailed information is placed in the section Generator.