Audi A4, S4

Since 2000 of release

Repair and car operation


Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
- The engine
   Specifications
   Removal and installation of the top cover of the engine / the bottom protection of an impellent compartment/stretcher
   Compression check in engine cylinders, revealing of leaks
   Check of the engine by means of the vacuum gauge
   - 4-cylinder petrol engines
      The general data
      Removal and installation of a gear belt
      Removal and installation of a head of cylinders
      Removal and installation of a belt of a drive of auxiliary units
   + 6 and 8-cylinder petrol engines
   + 4-cylinder diesel engines
   + 6-cylinder diesel engines
   + System of greasing of the engine
+ Systems of cooling, heating and the air conditioner
+ Power supply systems, release and decrease in toxicity of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


4-cylinder petrol engines

The general data

1.6 l (ALZ): the Engine рядный, with one верхнерасположенным a cam-shaft (OHC). The Camshaft is located in a head of cylinders and set in motion by a gear belt. The shaft operates on the hydraulic pushers located vertically which in turn influence inlet and final valves.

1.8 and 2.0 l (AVJ, BFB, ALT): the Engine рядный, with two верхнерасположенными cam-shafts (DOHC), has for each cylinder three inlet and two final valves. One camshaft actuates inlet valves, another final. The camshaft of final valves is set in motion from a cranked shaft through a gear belt. Camshafts of inlet and final valves are connected with each other by a chain.

2.0 l FSI (AWA): the Engine рядный, with two верхнерасположенными cam-shafts (DOHC), has for each cylinder on two inlet and final valves.

Petrol 4-cylinder engine FSI of 2.0 l

1 — the ignition Coil
2 — the Camshaft of final valves. On the back end the electric motor of an inclination of a camshaft is located
3 — the Camshaft of inlet valves. On the forward end the rotor of the gauge of the Hall, and on the back end the pump of a high pressure for fuel injection is located. The drive is carried out from a camshaft of final valves through a chain
4 — the Lever
5 — the Injector

6 — the Gear belt
7 — the Oil pump
8 — the Electric motor of an inclination of a camshaft
9 — the Block of management throttle заслонкой
10 — the Inlet pipeline
11 — the vacuum Accumulator
12 — the Platen of switching of the inlet pipeline
13 — the management Electric motor заслонкой the inlet pipeline
14 — the Cranked shaft

One camshaft actuates the inlet valves, the second final valves. The camshaft of final valves (1) is set in motion from a cranked shaft (2) gear belt (3). Camshafts of inlet and final valves are connected among themselves by a chain (4). Behind on distributive to a shaft of final valves the rotary engine (5) with which help automatically to 42 ° the corner of installation of a camshaft of final valves can be displaced is located. In a back part of a camshaft of inlet valves (6) there is a pump of a high pressure of system of direct injection of gasoline. It is put in action by a double cam (7) camshafts of inlet valves.

Basic elements of a head of cylinders of engines AVJ, BFB, ALT 1.8 l.

1 — the Cover of the bearing of a camshaft of final valves
2 — the Cover of the bearing of a camshaft of inlet valves
3 — Gazoraspredelitelnaja a chain
4 — the Double cover of bearings
5 — the Camshaft of inlet valves
6 — the Pusher
7 — Crackers of the cutting lock
8 — the Cogwheel of a cranked shaft
9 — Klapannaja a spring
10 — the Epiploon

11 Cap
12 — the Gauge of position of a camshaft (CMP)
13 — the Inlet valve
14 — the Epiploon
15 — the Final valve
16 — the Head of cylinders
17 — the Segment stopper
18 — Natjazhitel of a chain
19 — a valve Plate
20 — Maslootrazhatelnyj a cap


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