Mercedes C-Class

W203 since 2000 of release

Repair and car operation



Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
- Cooling and heating systems
   - Cooling system
      Antifreeze - means of protection from freezing
      Replacement of cooling liquid - general comments
      Removal and replacement of hoses of system of cooling
      Removal and thermostat installation
      Thermostat check
      Check of system of cooling under pressure
      Removal and installation of the pump of cooling liquid
      Removal and fan installation
      Removal and radiator installation
   + Systems of ventilation, heating and air conditioning
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment







Check of system of cooling under pressure

Tools for check of system of cooling under pressure

4800-1 — the Manual pump
4800-2 — the Hose
4800-15 — the Nozzle

Check

 PERFORMANCE ORDER

Leakage in system of cooling and functioning of a safety valve in a cover can be checked by means of the measuring device available on sale. The following HAZET tools for this purpose approach: the manual pump 4800-1 with a hose 4800-2 and a nozzle 4800-15.

If sealing laying of a head of cylinders was replaced, before check warm up the engine to working temperature and let's to it be cooled. Tightness of laying of a head of cylinders is thus provided.

At the hot engine before opening of a broad tank cover it with a thick rag to exclude a burn owing to influence of hot cooling liquid and steam. The cover should be removed only at temperature of cooling liquid below + 90°С.

1. Turn on Ѕ a turn to the left a cover on a broad tank and dump pressure in cooling system. Then turn a cover further and remove it completely.
2. Establish the heater switch in salon on the maximum capacity.
3. Check level of cooling liquid, if necessary add liquid, address to appropriate section.

4. Establish the device for check on the union for filling with liquid. By means of the pump of the device create pressure about 1.4 atm. If pressure falls, define a place of leak and eliminate a leakage.

the illustration has informative character and cannot correspond to considered model completely.

5. If pressure falls, and leakage of liquid is not present, the reason can be in internal leaks, for example, owing to damage of sealing laying of a head of cylinders or owing to crack existence in the case.


Check of a safety valve

 PERFORMANCE ORDER

The safety valve is located in a cover of a broad tank. Its task consists in opening of system of cooling and liquid plum at achievement of a certain pressure.

1. Screw a cover (2) on the device for control (1).

the illustration has informative character and cannot correspond to considered model completely.

2. Create the necessary pressure specified in Specifications. The safety valve opens in two steps. The vacuum valve opens at depression creation.

On a cover pressure of opening of the valve is given in atm. x 100. If, for example, on a cover costs «140/200», it is a question of a two-level cover and pressure of opening of the valve makes 1.4 and 2.0 atm.