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
   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


Restriction of speed

Our engines maintain quite high frequencies of turns. Valves are set in motion by means of the tarelochny pushers which are directly located over distributive shaft. At the same time the insignificant mass of metal is set in motion that does not constitute danger to the drive of valves.

This restriction is partial function of injection which with too high frequency of rotation of the engine stops further increase in turns by fuel interruption in supply. If you are surprised by interruptions in operation of the engine on high turns, then it is not defect, but the built-in self-defense of the engine. Speed border in Audi for various engines different:

  • Four-cylinder two-valve engine: 6500 rpm.
  • Four-cylinder five-valve engine: 6800 rpm.
  • Six-cylinder engine: 6200 rpm.