Mercedes S-class W202

1993-2000 of release

Repair and car operation



Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
- 3. Engines
   3.1.2. Identification number
   + 3.1.3. The engine
   3.1.4. Cars with the conditioner
   3.1.5. The bottom cover of a motor compartment
   3.1.6. Covers of cast apertures
   3.1.7. Натяжитель chains
   + 3.1.8. A cover of a head of the block of cylinders
   + 3.1.9. A head of the block of cylinders
   + 3.1.10. Camshafts
   3.1.11. Hydraulic тарельчатые pushers
   3.1.12. Maslootrazhatelnye caps
   3.1.13. Valves
   3.1.14. Directing valves
   3.1.15. Saddles of valves in a head of the block of cylinders
   3.1.16. A compression
   + 3.1.17. A klinovyj belt
   3.1.18. Diagnostics of malfunctions (DB)
   3.1.19. Broad-brush observations
   3.1.20. Repair work without engine dismantle
   + 3.1.21. Engine major repairs
   - 3.2. The diesel engine (ДД)
      + 3.2.2. The engine
   3.2.3. Cars with the conditioner
   3.2.4. The bottom cover of a motor compartment
   3.2.5. Covers of cast apertures
   3.2.6. Натяжитель chains
   + 3.2.7. A camshaft
   + 3.2.8. A head of the block of cylinders
   + 3.2.9. Maslootrazhatelnye caps
   3.2.10. A cover of a head of the block of cylinders (2,2/2,5)
   3.2.11. Hydraulic тарельчатые pushers
   3.2.12. Valves
   3.2.13. Directing valves
   3.2.14. Saddles of valves in a head of the block of cylinders
   3.2.15. A head of the block of cylinders and the motor block
   3.2.16. A compression
   3.2.17. Клиновой a ridge belt
   3.2.18. The pulling device клинового a ridge belt
   3.2.19. Diagnostics of malfunctions (ДД)
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes











3.2. The diesel engine (ДД)

3.2.1. Introduction
THE GENERAL DATA

The diesel engine in working volume of 2,0 l

1. The index of level of oil
2. The fan
3. A label of the top dead point
4. A remennyj pulley коленвала
5. A chain of a drive of the oil pump
6. The oil pallet
7. The oil pump
8. Коленвал
9. A flywheel
10. The piston
11. The cylinder
12. The oil filter
13. Tap of an inlet pipe
14. A candle накаливания
15. An atomizer
16. Hydraulic тарельчатый a pusher
17. A double vtulochno-roller chain

The diesel engine in working volume of 2,0 l

1. A cam-shaft
2. Hydraulic тарельчатый a pusher
3. The inlet channel
4. Exhaust pipe tap
5. The thermostat (a regulator of a cooling liquid)
6. The piston
7. A rod
8. The oil pallet
9. A stopper for engine oil plum
10. The oil pump
11. Коленвал
12. A gear wheel of the fuel pump
13. An operating chain
14. The fuel pump
15. Tap of an inlet pipe
16. A cable of management throttle заслонкой (a gas cable)

The engine in volume of 2,0 l

80. A cover of the bearing of a cam-shaft
81. A cover of the bearing of a cam-shaft
82. A cover of the bearing of a cam-shaft
84. Bolts with шестигранной a head, 25 Н.м.
84а. Prokladochnye washers
125. A cover of a head of the block of cylinders
185. A cam-shaft
186. A lock washer
187. A cylindrical pin
188. A cam-shaft gear wheel
189. A prokladochnaja washer
190. A bolt with двенадцатигранной a head, 25 Н.м. + 90
203. A valve pusher
210. A management chain
224. Натяжитель chains
237. Прокладочное a sealing ring
400. The delivery oil pump

Mercedes a C-class it is equipped рядными, 4 or 5-cylinder diesel engines.

In diesel engines in the cylinder pure air is sucked in and is exposed there to strong compression. Thanks to it the temperature in cylinders raises to temperature of ignition of diesel fuel (nearby 600 ). When the piston is near to the top dead point, fuel is injected into compressed air and самовоспламеняется, therefore there is no necessity for spark plugs. But in very cold engine compression cannot lead to ignition temperature. Therefore for heating in each vortical chamber of a diesel engine there is a candle накаливания which eats from the pressure submitted through the relay of a preliminary warming up.

The fuel pump (the pump of atomizers) receives fuel from топливоподкачивающего the pump. Diesel fuel moves in the fuel pump where the high pressure necessary for its injection (100–125 bar) is created. The regulator of the fuel pump operates quantity of injected fuel according to actuating of a pedal of an accelerator. In the fullness of time fuel is injected through atomizers into the prechamber of the corresponding cylinder. Before fuel will arrive in the fuel pump, it passes through the heat exchanger. There fuel preliminary gets warm, that strongly was not condensed and did not create a stopper in топливопроводах and the filter. The fuel filter detains mechanical impurity and water and consequently it is extremely necessary to change the filter according to the maintenance manual.

Fuel and топливоподкачивающий pumps do not require maintenance service. Both pumps are put in action from a cranked shaft through a chain of management which puts in action as well a cam-shaft. The aperture in a head of the block of cylinders provides greasing of each of two pumps with engine oil.
Engine model
С200
С220
С250
Time of release with
6/93
6/93
6/93
Type
202.120
202.121
202.125
The engine
601.913
604.910
605.910
Working volume, sm3
1997
2155
2497
Capacity,
Kw at rpm.
H.p. at rpm.

55/4600
75/4600

70/5000
95/5000

83/5000
113/5000
Twisting moment, Н.м. At rpm.
130/2000
150/3100
170/2800
Diameter of the cylinder, mm
87,0
89,0
87,0
Piston stroke, mm
84,0
86,6
84,0
Compression degree
22
22
22
Number of cylinders
4
4
5
Quantity of valves on 1 cylinder
2
4
4
The fuel pump / management
4-mortars. / ARF
EVE
5-mortars. / ERE
Operating procedure of cylinders
1–3–4–2
1–3–4–2
1–2–4–5–3
Refuelling capacities:
 – Engine oil (with the filter), l
6,0
6,5
7,0
 – охдаждающая a liquid, l
8,0
7,0
7,5

ARF – рециркуляция final gases
EVE – system of injection with the elektronno-regulated distributor
ERE – system of injection with consecutive electronic regulation