VW Passat B5

since 1996 release

Repair and operation of the car

Foltsvagen Passat B5
+ Maintenance instruction
+ 1. Maintenance
+ 2. Engines
+ 3. Cooling system
+ 4. Fuel system
+ 5. Engine management
- 6. Exhaust system
   6.2. Catalyst
   6.3. Operation of cars with the catalyst
   6.4. Turbocharger
   6.5. Replacement of the muffler
   6.6. Oxygen sensor
+ 7. Transmission
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
+ 12. Heating, ventilation
+ 13. Electric equipment

6.4. Turbocharger


Turbocharger of the engine 1,8-I AEB

1 – valve,
2 – collar,
3 – air deflector,
4 – oil supply pipeline,
5 – M10x50 bolt,
6 – final collector,
7 – M6x12 bolt,
8 – clip,
9 – plate,
10 – laying,
11 – union,
12 – a pipe for cooling liquid,
13 – turbocharger,
14 – oil supply pipeline,
15 – oil return pipeline,
16 – a pipe for cooling liquid,
17 – arm

Turbocharger of the diesel engine 1,9 AHU

1 – final collector,
2 – connecting bolt,
3 – oil return pipeline,
4 – pressure valve,
5 – sealing ring,
6 – union,
7 – clip,
8 – arm,
9 – plate,
10 – oil supply pipeline,
11 – turbocharger,
12 – bolt

On diesel engines and four-cylinder petrol engines with a power of 150 hp the turbocharger, see rice is established. Turbocharger of the engine 1,8-I AEB.

Power which the engine can develop depends on amount of air and fuel which comes to engine cylinders. For increase in engine capacity it is necessary to increase both amount of the given air, and fuel. Giving of bigger amount of fuel will not give effect until the amount of air, sufficient for combustion, appears, differently excess of not burned down fuel is formed that leads to an overheat of the engine which besides at the same time strongly smokes. For increase in amount of the air given to the engine the turbocharger which compresses the air given to the combustion chamber is used.

The turbocharger consists of the centrifugal air pump and the turbine connected by means of the general rigid axis among themselves. Both of these elements rotate in one direction and with an identical speed. Energy of a stream of the fulfilled gases which in ordinary engines is not used will be transformed to the torque putting a turbocharger in action here. The fulfilled gases which are going out of engine cylinders have high temperature and pressure. They disperse to high speed and come into contact with shovels of the turbine which will transform their kinetic energy to mechanical energy of rotation. This transformation of energy of a soprovozhd etsyatsya by decrease in temperature of exhaust gases and their pressure. The turbocharger sucks in air via the air filter, squeezes it and gives to engine cylinders. The amount of fuel which can be mixed with air at the same time can be increased that allows the engine to develop big power.

For turbocharger lubricant engine oil moves under pressure on the special pipeline.

As the turbocharger works at high speeds, it is necessary to observe care and purity that pollution did not get to a turbocharger and did not put it out of action.


Before a detachment of any elements from a turbocharger carefully clear them of dirt. For protection against pollution the elements removed from a turbocharger arrange in a tight container. For an exception of hit of pollution in a turbocharger close air channels of a turbocharger.

Between a turbocharger and an inlet collector the heat exchanger which reduces temperature of the air given to the engine is installed. Cooling of air increases the engine capacity as in cold air because of its higher density the content of oxygen increases.

On cars with AFN and AHH engines engine capacity increases due to use of the operated turbocharger. On the operated turbocharger there are adjustable guides of a shovel which are run by the magnetic valve and the vacuum block. In this regard on all operational power setting the turbocharger creates the optimum pressure of pressurization that increases torque of the engine.