Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
- Engines
   Basic elements
   Greasing system
   Ventilation картера
   Visual check of the engine
   Обкатка the new engine
   Engine service life
   Nominal and maximum frequency of rotation
   Restriction of frequency of rotation
   Measurement of pressure of compression
   The list of malfunctions
   Проворачивание the engine
   Hydraulic pushers
   Works on gear belt ГРМ
   The list of malfunctions
   Removal and installation of a head of the block of cylinders
   Removal and engine installation
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


Restriction of frequency of rotation

The absolute border of frequency of rotation is approximately at level of 6700 rpm. Most later 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.

That business did not come so far, in engines Audi restriction of frequency of rotation which in case of approach to the named range of number of turns stops the further escalating of frequency of rotation by the termination of receipt of fuel is built in.

So if you already had to be surprised to faults in engine work on very high turns know are at all malfunctions, and the built in self-defence of the engine.