Auto Manual of VW Passat B5



VW Passat
The maintenance instruction
1. Maintenance service
2. Engines
- 3. Cooling system
   3.2. Доливка a cooling liquid
   3.3. Structure of a mix of a cooling liquid
   3.4. Replacement of a cooling liquid
   3.5. The thermostat
   3.6. A radiator
   3.7. The water pump (engines 1,8-I and 1,6-I ADP)
   3.8. Hoses of system of cooling
   3.9. Malfunctions of system of cooling
4. Fuel system
5. Engine management
6. An exhaust system
7. Transmission
8. A running gear
9. A steering
10. Brake system
11. A body
12. Heating, ventilation
13. An electric equipment



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3. Cooling system

3.1. The general information
THE GENERAL DATA

Elements of system of cooling of the engine 1,6-I/1,8-I

1 – a heater radiator;
2 – the returnable pipeline;
3 – the throttle case;
4 – a broad tank;
5 – the oil heat exchanger;
6 – an inlet collector;
7 – the top hose of a radiator;
8 – the bottom hose of a radiator;
9 – a radiator;
10 – the pipeline of giving of a cooling liquid;
11 – the water pump/thermostat;
12 – a head of the block of cylinders/blocks of cylinders of the engine;
13 – a connecting branch pipe

Elements of system of cooling of the diesel engine

1 – a heater radiator;
2 – the oil heat exchanger;
3 – a broad tank;
4 – the top hose of a radiator;
5 – the bottom hose of a radiator;
6 – a radiator;
7 – the water pump;
8 – the block of cylinders of the engine

Units of system of cooling of the engine 1,8-I

1 – the screw, 20 Nanometers;
2 – the bottom casing of a gear belt;
3 – a sealing ring. At  installation it is necessary to use a new sealing ring;
4 – the water pump. The thermostat  is located in the case of the water pump;
5 – the oil heat exchanger fastens on the holder of the oil filter;
6 – fixing скобы;
7 – an electric socket;
8 – the gauge of temperature of a cooling liquid. The gauge of temperature of a cooling liquid is intended for a control system of the engine and the temperature index;
9 – заглушка;
10 – to a heater radiator;
11 – a connecting branch pipe;

12 – a bolt, 10 Nanometers;
13 – the pipeline for a cooling liquid;
14 – the throttle case;
15 – from a heater radiator;
16 – the pipeline for a cooling liquid;
17 – a cover;
18 – a sealing ring;
19 – a broad tank;
20 – a hose for a cooling liquid;
21 – an arm. The arm is intended for fastening of the mechanism of a tension поликлинового a belt, вискомуфты the radiator fan, крыльчатки the pump of the amplifier of a steering and the generator.
22 – a belt;
23 – крыльчатка the radiator fan

The fan and radiator of cars with four-cylinder engines

1 – крыльчатка;
2 – visko-mufta;
3 – щкив;
4 – an arm;
5 – a forward cross-beam;
6 – a radiator curtain;
7 – consolidation;
8 – a radiator

The system of cooling of tight type includes the water pump with a drive from auxiliary приводного a belt, the fan of a radiator with термовязкостной муфтой, a radiator, a broad tank, the thermostat and a heater radiator, and also hoses and switches. At start of the cold engine the cooling liquid circulates round the block of cylinders and a head of the block of cylinders. The warm cooling liquid passes through a heater radiator to the water pump. As the cooling liquid at heating extends, its level in a broad tank raises. Receipt of a cooling liquid through a radiator is closed that provides the closed thermostat. When the cooling liquid will reach the predetermined temperature, the thermostat opens also a hot cooling liquid passes through a hose to a radiator as the cooling liquid passes through a radiator, there is its cooling by a stream of counter air. Термовязкостная муфта the radiator fan joins depending on air temperature behind a radiator. At achievement of the predetermined temperature the valve in муфте opens and термовязкостная муфта puts in action крыльчатку the fan. When the temperature of a cooling liquid is in limits from 92 With to 98 About a temperature-sensitive element includes the first step of the fan of a radiator and the fan rotates with the reduced number of turns. At temperature of a cooling liquid from 99 With to 105 About a temperature-sensitive element includes the radiator fan on the second step and the fan rotates with a maximum quantity of turns.

The fan with an electric drive can join and after ignition deenergizing. Therefore at work on the hot engine for the period of work it is necessary to disconnect an electric socket from the fan engine.


The prevention

At opening of a cover of a broad tank on the hot engine it is necessary to be careful, as leaving steams can lead to strong burns. For this purpose close a cover of a broad tank a thick layer of a fabric and slowly unscrew a cover before occurrence of a hissing sound. After the hissing termination slowly unscrew, and uncover a broad tank.

Do not suppose hit of a cooling liquid on clothes and a paint and varnish covering of a body. Otherwise wash out a surface a plentiful quantity of water.