Mercedes M-Class W163

since 1997 release

Repair and operation of the car


Mercedes W163
+ Mercedes-Benz cars of a class M (W163)
+ Governing bodies and methods of safe operation
+ Current leaving and service
+ Engine
- Cooling systems, heating and air conditioner
   - Engine cooling system
      Antifreeze - a security measure from freezing
      Replacement of cooling liquid - general comments
      Replacement of hoses of the cooling system
      Check of the thermostat
      Removal and installation of the thermostat
      Removal and installation of a radiator of the cooling system
      Removal and installation of assembly of the fan of the cooling system
      Removal and installation of the water pump
   + Systems of ventilation, heating and air conditioning
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Automatic transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Removal and installation of the thermostat

Petrol models

M111

Working element of the thermostat

Details of installation of a working element of the thermostat of the engine of a series 111


 PERFORMANCE ORDER

  1. Details of installation of a working element of the thermostat of the engine of a series 111 are shown on an illustration to which all references which are found in the text belong.
  2. Empty the cooling system (see the Head of the Power supply system and production of the fulfilled gases).
  3. Remove the top forward cover.
  4. Disconnect hoses of a cooling path (2 and 4).
  5. Turn out fixing bolts (1) and uncover (27) thermostats with the working element which is built in it (27a) a casing of the thermostat (30).

In order to avoid irreversible damages the working element should not be taken from a cover! In case of need replacement of an element is made assembled with a cover.

  1. Installation is made upside-down.
  2. In conclusion check the cooling system for existence of signs of development of leaks.

The thermostat assembled with a casing

Details of installation of assembly of the thermostat of the engine of a series 111


 PERFORMANCE ORDER

  1. Details of installation of assembly of the thermostat of the engine of a series 111 are shown on an illustration to which all references which are found in the text belong.
  2. Remove assembly of the fan of the cooling system with the viscous coupling (1).
  3. Empty the cooling system (see the Head of the Power supply system and production of the fulfilled gases).
  4. Uncover the power unit (16).
  5. Disconnect hoses of a cooling path (2, 3 and 4).
  6. Disconnect an electrical wiring and vacuum lines from the thermostat (30) of the sensor of temperature which is built in in a casing.
  7. Remove an eye (6).
  8. Turn out fixing bolts (7, 8 and 9) and remove a casing of the thermostat (30) assembled with a cover (27).
  9. Carefully smooth out a sealing surface, prepare a replaceable sealing ring (31).
  10. If the casing of the thermostat needs replacement, remove from it temperature sensor.
  11. Installation is made upside-down.
  12. In conclusion check the cooling system for existence of signs of development of leaks.

M112/113

Details of installation of assembly of the thermostat of engines of series 112 and 113

1 — a thermostat Casing
2 — the Sealing ring
3 — Fixing bolts

4 — the Collar
5 — the Hose of a cooling path
6 — the Radiator


 PERFORMANCE ORDER

  1. Details of installation of the thermostat of engines of series 112 and 113 are shown on an illustration to which all references which are found in the text belong.
  2. Empty the cooling system (see the Head of the Power supply system and production of the fulfilled gases).
  3. Remove the panel of finishing of the power unit / assembly of the air cleaner.
  4. Disconnect a hose of a cooling path (5).
  5. Turn out fixing bolts (3) and remove a casing of the thermostat (1) assembled with a working element.

In order to avoid irreversible damages the working element should not be taken from a cover! In case of need replacement of an element is made assembled with a cover.

  1. Installation is made upside-down.
  2. In conclusion check the cooling system for existence of signs of development of leaks.

Diesel models

M612

Details of installation of the thermostat of the engine of a series 612

9 — a thermostat Casing
14 — the Union
16 — the Bolt
17 — the Hose of a cooling path

18 — the Ventilating hose
20 — the Basic arm of fuel lines
B11/4 — the Sensor of temperature of cooling liquid

Details of installation of the sensor of temperature of cooling liquid on the series 612 engine

1 — the Sensor of temperature of cooling liquid
2 — the Contact socket of an electrical wiring

3 — the Clamp
4 — the Sealing ring


 PERFORMANCE ORDER

  1. Details of installation of the thermostat and the sensor of temperature of cooling liquid of the engine of a series 612 are shown on illustrations to which all references which are found in the text belong.
  2. Empty the cooling system (see the Head of the Power supply system and production of the fulfilled gases).
  3. Remove panels of finishing of a cover of a head of cylinders.
  4. Disconnect an electrical wiring from the sensor of temperature of cooling liquid (B11/4).
  5. In case of need remove a clamp (3) and take the sensor (1), - prepare a new sealing ring (4).
  6. Remove a basic arm of fuel lines (20). Disconnect from a thermostat casing (9) lines cooling (17) and ventilating (18) paths.
  7. Remove a casing of the thermostat (9), - pay attention to adjusting position of the connecting union (14), prepare new sealing laying.
  8. Installation is made upside-down.
  9. In conclusion check the cooling system for existence of signs of development of leaks.

M628

Details of installation of the thermostat of the engine of a series 628

1 — the Top air duct
2 — the Hose of a cooling path
3 — a thermostat Casing
3a — the Sealing ring

4 — the Basic arm of fastening of an air duct (is not applied)
4a — Screws
5 — the Hose of a cooling path


 PERFORMANCE ORDER

  1. Details of installation of the thermostat of the engine of a series 628 are shown on an illustration to which all references which are found in the text belong.
  2. Remove bypass a sleeve of a path of pressurization of air.
  3. Disconnect from a casing of the thermostat (3) a hose of a cooling path (2).
  4. Remove a casing of the thermostat (3) assembled with a working element, - prepare a replaceable sealing ring (3a).
  5. Installation is made upside-down.
  6. In conclusion check the cooling system for existence of signs of development of leaks.