Repair and service Mercedes Benz M - the Class W163 - thermostat Check//since 1997 of release / mehanicm.ru

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
      Antifreeze - means of protection from freezing
      Replacement of cooling liquid - general comments
      Replacement of hoses of system of cooling
      Thermostat check
      Removal and thermostat installation
      Removal and installation of a radiator of system of cooling
      Removal and installation of assembly of the fan of system of cooling
      Removal and installation of the water pump
   + 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



Thermostat check

Check without thermostat removal

 PERFORMANCE ORDER

  1. Before removing and checking operability of the thermostat, be convinced that problems with cooling of the engine arose not owing to insufficient amount of cooling liquid or a weak tension of a driving belt. Be convinced of serviceability of the indicator located on a combination of devices.
  2. If you noticed that the engine long gets warm to working temperature (according to indicator indications), the thermostat, possibly, is jammed in open situation. In this case it is necessary to replace the thermostat.
  3. On the other hand, long warming up can be a consequence of lack of the thermostat. It could make specially or inadvertently (forgot to establish after repair). Do not use the car without the thermostat. The control system of the engine will keep the engine in a warming up mode longer time. During this time the engine will consume bigger amount of fuel, and the fulfilled gases will contain bigger amount of harmful impurity.
  4. If the engine overheats, touch the top hose of a radiator. If it not hot, but the engine перегрет, the thermostat, probably, jammed in a closed position. Liquid does not get to a radiator and circulates on a small circle. In this case replace the thermostat.
  5. If the top hose of a radiator hot, it means that the thermostat is open and liquid normally circulates on system. In this case familiarize with the recommendations provided in the Section Diagnostics of malfunctions.

Check with thermostat removal

Check of serviceability of functioning of the thermostat


 PERFORMANCE ORDER

  1. Remove the thermostat (see. Section Removal and thermostat installation).
  2. If the thermostat at room temperature is abroach - it is faulty and is subject to replacement.
  3. For rough check of operability of the thermostat suspend it on a piece of a twine in capacity with water. The thermostat should not concern capacity walls. Start to heat up capacity.
  4. In process of water heating the thermostat should open (it occurs directly ahead of water boiling). As the temperature of boiling of water makes 100°С, the thermostat can not open completely (address to Specifications). Take the thermostat and let's to it cool down. In process of cooling it should be closed completely.
  5. If the thermostat does not open when heating or is not closed when cooling, replace it.
  6. At installation of the thermostat pay attention to the next moments:

    a) Carefully clear interfaced surfaces and replace a sealing ring;
    b) Place the thermostat in a casing, it is correct сориентировав;
    c) Tighten bolts of fastening of a cover, having made demanded effort;
    d) Establish all hoses on former places then fill in cooling liquid (address to Head the Current leaving and service);
    e) Start the engine, warm up to working temperature and be convinced of absence of leaks.