Mercedes C-Class

W203 since 2000 of release

Repair and car operation

+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
- Engine
   Compression check in engine cylinders
   Engine check by means of the vacuum gage
   Removal and installation of a cover of an impellent compartment from the bottom
   + 4-cylinder petrol engines
   + 6-cylinder petrol engines
   + Diesel engines
   - System of greasing of the engine
      Check of pressure of oil
      Removal and installation of the sensor of level of oil
+ cooling and heating Systems
+ 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

System of greasing of the engine

General information

The scheme of circulation of oil in the engine

The illustration has informative character and cannot correspond to considered model completely.
1 — the Oil channel of a head of cylinders
2 — the Trunk oil main
3 — oil Injection for piston cooling
4 — the Oil filter of the main stream
5 — Maslookhladitel

Oil filter. 4-cylinder petrol engine 111

1 — the Cover of the oil filter
2 — the Sealing ring
3 — the Filtering element
4 — Perepuskna the valve
5 — the idling Valve
6 — the Sealing ring
7 — the Carving stopper
8 — the Return valve
9 — the Spring
10 — the Sealing ring
11 — the Stopper

Oil filter. 6-cylinder petrol engine 112

1 — the Bolt, 11Нм
2 — the Sealing ring
3 — the Union
4 — Maslookhladitel
5 — the Sealing ring
6 — the filter Case
7 — the Sealing ring
8 — the Cover of the oil filter
9 — the Set of sealing rings
10 — the Filtering element

Oil filter. Diesel engines

1 — the Set of sealing rings
2 — the Filtering element
3 — the Casing of the mechanism of distribution
4 — the Cover of the oil filter
5 — Sealing laying of a maslookhladitel
6 — Maslookhladitel
7 — the Bolt

Engines are equipped with circulating system of greasing under pressure.

The oil pump sucks in oil through a grid from the pallet of a case and submits it under pressure to system via the oil filter. On an exit from the oil pump there is a reduktsionny valve. At pressure increase above the established value the valve opens and the part of oil merges back in the case pallet.

Through the central opening of the oil filter oil arrives directly to the main canal. At a contamination of the oil filter perepuskny the valve directs oil to system to not filtered.

From the trunk oil main channels for greasing of bearings of a cranked shaft branch off. Through inclined openings in a cranked shaft oil moves to shatunny bearings. For cooling of pistons oil is injected on them from below through nozzles.

At the same time oil through vertical galleries reaches heads of cylinders and arrives for greasing of bearings of camshafts and elements of klapanny mechanisms of system of a gazoraspredeleniye.

Depending on engine capacity oil can be cooled in the additional maslookhladitel located sideways, at the case of the oil filter and included in a contour of system of cooling of the engine.

Consumption of oil

At internal combustion engines the consumption of oil is understood as its such quantity which is consumed owing to combustion process. It is not necessary to confuse a consumption of oil to its loss arising owing to a leakage of the pallet of a case, a cover a head of cylinders, etc.

The normal consumption of oil arises owing to combustion of a small amount of oil in cylinders, owing to branch with products of combustion and wear products. Besides, oil is lost owing to high temperatures of combustion and the high pressure, taking place at operation of the engine. The consumption of oil is influenced by also external service conditions, such as management style the car, and also admissions of manufacturing of details of the engine. The consumption of oil should not exceed 0.8 l/1000 of km.

At all do not fill in oil above Max mark. If the superfluous amount of oil was poured, it is necessary to remove it. Otherwise the catalytic converter since not burned down oil gets to release system can be damaged.