Audi A4

since 1994 release

Manual of the car

Audi A4
+ Running gear
+ Regular servicing
- Engines
   Power steps
   Engine signs
   Technology of the engine, maintenance and repair
   Lubrication system
   Exhaust ventilation of a case
   Visual control of the engine
   Engine service life
   Nominal and maximum frequency of turns
   Restriction of speed
   Measurement of pressure of compression
   The help at malfunctions
   Hydropushers
   Works on a gear belt
   The help at malfunction
   Installation and dismantle of a head of the block of cylinders
   Installation and dismantle of the engine
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ 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

The help at malfunction

Laying of a head of the block of cylinders

Identification sign	Reasons/features
A. Level of cooling liquid constantly slowly falls	Cooling liquid in very small quantities gets to combustion chambers. This phenomenon without existence of other signs can proceed a long time. Other opportunity: untight cooling system
B. The loop of white smoke, considerable loss of cooling liquid tries to keep step with the car at a working temperature	Cooling liquid in a significant amount gets into the combustion chamber, evaporates there and comes out via the exhaust system in the form of a white loop
C. At the working engine from an open broad tank vials of air rise or when opening of the locking cover raging the increased amount of cooling liquid pours out	Exhaust gases are wrung out in the cooling system. From an opening of a radiator smells of exhaust gases
D. The surface of cooling liquid is poured by all colors of the rainbow or is painted in black color	Oil from the lubrication system gets to the cooling system
E. An emulsion gray or brown by sight on the taken-out probe for measurement of level of oil, or oil is penetrated by vials of liquid	Cooling liquid got into the lubrication system. Attention: water in engine oil can damage bearings. At once replace laying of a head of the block of cylinders. Do not start the engine any more! Send the car to repair