Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation


Audi 80/Avant
+ Technical specification
- Engines
   Basic elements
   Greasing system
   Case ventilation
   Visual check of the engine
   Running in of the new engine
   Engine service life
   Nominal and maximum frequency of rotation
   Restriction of frequency of rotation
   Measurement of pressure of compression
   List of malfunctions
   Provorachivaniye of the engine
   Hydraulic pushers
   Works on the GRM gear belt
   List of malfunctions
   Removal and installation of a head of the block of cylinders
   Removal and engine installation
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications

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Restriction of frequency of rotation

The absolute limit of frequency of rotation is approximately at level of 6700 rpm. The latest after that numbers of turns of a spring of valves start to fluctuate so strongly that any more do not provide faultless opening and closing of valves. Springs of valves can come off that leads to such consequences, as collision of the valve with the piston and, thereby, to serious breakage of the engine.

In order that business did not come so far, in Audi engines restriction of frequency of rotation which in case of approach to the called range of number of turns stops further accumulation of frequency of rotation by the termination of intake of fuel is built in.

So if you already had to be surprised to interruptions in operation of the engine on very high turns, know is at all malfunctions, and the built-in self-defense of the engine.