S-class W202 Mercedes

1993-2000 of release

Repair and car operation



W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
- 3. Engines
   3.1.2. Identification number
   + 3.1.3. Engine
   3.1.4. Cars with the conditioner
   3.1.5. Bottom cover of a motor compartment
   3.1.6. Covers of cast openings
   3.1.7. Natyazhitel of a chain
   + 3.1.8. Cover of a head of the block of cylinders
   + 3.1.9. Head of the block of cylinders
   + 3.1.10. Camshafts
   3.1.11. Hydraulic tarelchaty 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. Compression
   + 3.1.17. Klinovy belt
   3.1.18. Diagnostics of malfunctions (DB)
   3.1.19. General comments
   3.1.20. Repair work without engine dismantle
   + 3.1.21. Major maintenance of the engine
   - 3.2. Diesel engine (DD)
      + 3.2.2. Engine
   3.2.3. Cars with the conditioner
   3.2.4. Bottom cover of a motor compartment
   3.2.5. Covers of cast openings
   3.2.6. Natyazhitel of a chain
   + 3.2.7. Camshaft
   + 3.2.8. Head of the block of cylinders
   + 3.2.9. Maslootrazhatelnye caps
   3.2.10. Cover of a head of the block of cylinders (2,2/2,5 l)
   3.2.11. Hydraulic tarelchaty 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. Head of the block of cylinders and motor block
   3.2.16. Compression
   3.2.17. Maple ridge belt
   3.2.18. Tense device of a maple ridge belt
   3.2.19. Diagnostics of malfunctions (DD)
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes








b47c026d b47c026d


3.2. Diesel engine (DD)

3.2.1. Introduction

GENERAL INFORMATION

Diesel engine in working volume of 2,0 l

1. Index of level of oil
2. Fan
3. Label of the top dead point
4. Remenny pulley of the crankshaft
5. Chain of a drive of the oil pump
6. Oil pallet
7. Oil pump
8. Crankshaft
9. Flywheel
10. Piston
11. Cylinder
12. Oil filter
13. Branch of an inlet pipe
14. Glow plug
15. Nozzle
16. Hydraulic tarelchaty pusher
17. Double vtulochno-roller chain

Diesel engine in working volume of 2,0 l

1. Cam-shaft
2. Hydraulic tarelchaty pusher
3. Inlet channel
4. Branch of an exhaust pipe
5. The thermostat (a regulator of cooling liquid)
6. Piston
7. Rod
8. Oil pallet
9. A stopper for plum of engine oil
10. Oil pump
11. Crankshaft
12. Gear wheel of the fuel pump
13. An operating chain
14. Fuel pump
15. Branch of an inlet pipe
16. Cable of management of a butterfly valve (gas cable)

Engine in volume of 2,0 l

80. Cover of the bearing of a cam-shaft
81. Cover of the bearing of a cam-shaft
82. Cover of the bearing of a cam-shaft
84. Bolts with a six-sided head, 25 N of m.
84а. Prokladochnye of a washer
125. Cover of a head of the block of cylinders
185. Cam-shaft
186. Lock washer
187. Cylindrical pin
188. Cam-shaft gear wheel
189. Prokladochny washer
190. A bolt with a dvenadtsatigranny head, 25 N of m + 90 °
203. Valve pusher
210. Management chain
224. Natyazhitel of a chain
237. Prokladochnoye sealing ring
400. Delivery oil pump

Mercedes C-class is equipped ryadny, 4-or 5-cylinder diesel engines.

In diesel engines in the cylinder clean 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 (about 600 ° C). When the piston is near the top dead point, fuel is injected into the compressed air and самовоспламеняется therefore there is no need 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 glow plug which eats from the tension submitted through the relays of a preliminary warming up.

The fuel pump (the pump of nozzles) receives fuel from the toplivopodkachivayushchy 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 amount of injected fuel according to actuating of a pedal of an accelerator. At the right time fuel is injected through nozzles into the prechamber of the corresponding cylinder. Before fuel will arrive in the fuel pump, it passes through the heat exchanger. There fuel gets warm previously, 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 toplivopodkachivayushchy pumps do not need maintenance. 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 opening in a head of the block of cylinders provides greasing of each of two pumps with engine oil.
Engine model
С200
С220
С250
Release time with
6/93
6/93
6/93
Type
202.120
202.121
202.125
Engine
601.913
604.910
605.910
Working volume, cm3
1997
2155
2497
Capacity,
kW at rpm.
h.p. at rpm.

55/4600
75/4600

70/5000
95/5000

83/5000
113/5000
Torque, N of m 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
Extent of compression
22
22
22
Number of cylinders
4
4
5
Number of valves on 1 cylinder
2
4
4
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
Refueling capacities:
 – engine oil (with the filter), l
6,0
6,5
7,0
 – okhdazhdayushchy liquid, l
8,0
7,0
7,5

ARF – a retsirkulyatsiya of final gases
EVE – injection system with the electronic and adjustable distributor
ERE – injection system with consecutive electronic regulation