Mercedes M-Class W163

since 1997 of release

Repair and car operation


Mercedes W163
+ Mercedes-Benz Cars of a class M (W163)
+ Governing bodies and receptions of safe operation
+ Current leaving and service
+ Engine
- Systems of cooling, heating and air conditioner
   + System of cooling of the engine
   + Systems of ventilation, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Avtomaticheckaya transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Systems of cooling, heating and air conditioner

Specifications

Cooling system

General parameters

Type of system of cooling Closed, with the water pump, the thermostat, a radiator, the fan (electric or with the vyazkostny coupling of coupling) and separately established broad tank
System volume See. Specifications to Head the Current leaving and service
Composition of cooling liquid (a share of antifreeze in cooling liquid for ensuring frost resistance)
to - 37°С 50 %
to - 45°С 55 %
Pressure in system About 1.4 bar (the exact size is specified on a cover of a broad tank).
Thermostat
Valve stroke, mm not less than 8
Temperatures of activation of the valve, °C
Opening beginning 85 ÷ 89
Complete opening 102
Cover of a path of system of cooling
Petrol models On models petrol models the cover of system of cooling is not subject to testing and in case of failure should be replaced
Diesel models (code of a cover 140/200)
Depth of depression of operation of the vacuum valve, bar 0.1
Pressure of opening of a safety valve, bar
The first stage (temperature of cooling liquid 130/134°C) 1.4
The second stage (temperature of cooling liquid 137/143°C) 2.0
Pressure of testing of a cover, bar 1.4 (a cover should keep this pressure within not less than 2 minutes)
Air central air
Coolant type R134a
Volume of a coolant, g 750
Type of refrigerator oil Synthetic PAG
Amount of the compressor oil added at:
To replacement of the evaporator, cm3 40
To replacement of the condenser, cm3 20
To replacement of a receiver dehumidifier, cm3 10
To replacement of the soaking-up line, cm3 20
To replacement of the pressure head line, cm3 20
To replacement of the compressor, cm3 20
Identification of leaks, cm3 20
After a sudden devastation of system, cm3 40
Efforts of a tightening of carving connections, Nanometer
Cooling system
М111

Bolts of fastening of a casing of the thermostat

  • М6
10
  • М8
25
Shtutserny nut of the line of cooling of ATF on a radiator (model with AT) 20
Hollow bolt of shtutserny connection 20
Bolt of fastening of a krylchatka of the fan to the vyazkostny coupling 10
Bolt of fastening of the vyazkostny coupling to the bearing case (it is tightened by means of the special adaptation) 40
Bolts of fastening of the water pump to an engine case
М6 10
М8 25
Bolt of fastening of a pulley of the water pump 10
M112/113
Bolts of fastening of a casing of the thermostat (М6) 10
Shtutserny nut of the line of cooling of ATF on a radiator 20
Hollow bolt of shtutserny connection on a radiator (М12x1.5) 30
Bolt of fastening of a krylchatka of the fan to the vyazkostny coupling 10
Bolt of fastening of the vyazkostny coupling to the bearing case (it is tightened by means of the special adaptation) 40
Screws of fastening of the generator 42
Bolts of fastening of a damper of a natyazhitel of a belt of a drive of auxiliary units
To a natyazhitel 25
To the water pump 35
Self-cut bolts of fastening of the water pump to a cover of a drive of GRM
М6
  • The carving is not cut
14
  • The carving is cut
10
M8
  • The carving is not cut
35
  • The carving is cut
25
Bolt of fastening of a pulley of the water pump 10
М612
Screws of fastening of the finishing panel of a cover of a head of cylinders 10
Screws of fastening of the finishing panel of the air distributor 10
Bolts of fastening of a casing of the thermostat (М6) 9
Hollow bolt of shtutserny connection on a radiator (the line of leakages of oil) 30
Bolts of fastening of the water pump to a cover of a drive of GRM
М6 14
М8 20
Bolt of fastening of a pulley of the water pump 35
М628
Bolts of fastening of a casing of the thermostat (М6) 9
Shtutserny nut of the line of cooling of ATF on a maslookhladitel 25
Hollow bolt of shtutserny connection of the line of cooling of ATF on a maslookhladitel 25
Hollow bolt of shtutserny connection on a radiator (the line of leakages of oil) 30
Bolts of fastening of the water pump to an engine case 10
Bolt of fastening of a pulley of the water pump 25
Heating/ventilation/air conditioning systems
Nuts of fastening of the dashboard to a partition of an impellent compartment 8
Bolts of fastening of the dashboard to racks And 19
Bolts of fastening of the dashboard to the transmission tunnel 30
Shtutserny nut of fastening of a tube to the broad valve of To/in system 10
Bolt of fastening of the refrigerator line to a receiver 10
Bolt of fastening of the refrigerator line to the condenser 20
Bolt of fastening of the broad valve to the evaporator heat exchanger 10

General information

System of cooling of the engine

All models of cars considered in the real Management are equipped with system of cooling of the engine working at superfluous pressure with thermostatic management of circulation of working liquid. The water pump is fixed on the block of the engine and provides pumping of cooling liquid through an okhladitelny path of the last. The stream of liquid washes regions of an arrangement of each of cylinders in the block then goes to a back part of the engine. Laid in molding of the block and a head of cylinders okhladitelny channels provide intensive cooling of inlet and final ports, areas of installation of spark plugs and directing plugs of final valves.

From the moment of engine start the system of cooling passes through three modes of functioning: at the first stage while the temperature of cooling liquid did not rise above a certain value, it circulates on a small circle from which working contour the radiator is excluded. In process of further warming up of liquid the tarelchaty valve entering into a path of system of the voskozapolnenny thermostat opens and the radiator is connected to a contour of circulation. Further, on reaching temperature of cooling liquid of the next control value, works the thermosensitive sensor switch providing activation of the fan of system of cooling, forced which the additional air stream considerably increases efficiency of functioning of the heat exchanger of a radiator.

The system of cooling has a tight design and is densely closed by a cover of the radiator, capable to maintain a certain superfluous pressure that provides increase of a boiling point of cooling liquid and, respectively, efficiency of a heat-conducting path through a radiator. At excess by internal pressure in system of some certain value, there is an overflowing of excess of cooling liquid on a connecting (perelivny) tube in a broad tank. In process of system cooling liquid automatically comes back from a tank to a radiator.

Filling of cooling liquid in system is made through a mouth of a broad tank (see. Head of the Power supply system and production of the fulfilled gases) which at the same time acts also as a receiver accumulating in forced out from a radiator excess of liquid.

In view of the listed features of a design, such system of cooling received the name closed as in it any functional losses of working heat are excluded.

Heating and ventilation system

The system of heating consists of fans and the heat exchangers located in blocks of forward and back parts of salon. Hot cooling liquid passes through heat exchangers. When moving the handle of management by modes of the heater, located on the control panel, valves and hot air open starts to arrive in car salon. If to turn on the heater fan, air will move in salon compulsorily.

External air before getting to salon, is passed through special the filter, in the carburetor the main share of particles of a dust settles. Replacement of the salonny filter should be made on a regular basis according to the Schedule of routine maintenance of the car (see. Head of the Power supply system and production of the fulfilled gases). Violation of passableness of the filter brings with decline of productivity of functioning of systems of heating/ventilation/air conditioning.

Distribution of streams of air of system of ventilation is carried out with the help a zaslonok. Possibility of switching of modes of air circulation is provided. A drive a zaslonok осущестлвяется by means of servomotors.

Air central air

See. Section General information and security measures.