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)
   3.2.3. 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
      3.2.7.2. The engine in volume of 2,2/2,5 l
   + 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







3.2.7. A camshaft

3.2.7.1. The engine in volume of 2,0 l
THE GENERAL DATA

The cam-shaft acts in film upward at the established head of the block of cylinders.
The prevention

If details газораспределения are used again, they need to be established on former places. To avoid mess, it is necessary to make a special box for their storage.


Removal

PERFORMANCE ORDER
1. Disconnect "a weight" wire (–) from the accumulator.
The prevention

The anticreeping code of radio is thus erased.


2. Remove a cross-section pipe of the air filter.
3. Unscrew a cover of a head of the block of cylinders.
4. Establish the engine in the top dead point of ignition. For this purpose it is necessary to scroll the engine, marks on картере a cam-shaft and a belt pulley коленвала will not coincide yet. Instructions: the top dead point (ВМТ) is the highest position which reaches the piston at movement in the cylinder. Thus it is necessary to distinguish a dead point of ignition after which the piston compresses soaked up air, and simply top dead point after which the piston pushes out combustion gases.
5. Establish a transmission in position of idling and by means of an asterisk strengthened by the central bolt of a belt pulley коленвала turn коленвал in a direction of rotation of the engine, i.e. Clockwise. Turn until marks "Island Т" (ВМТ) on a belt pulley will not be established under the index.
The prevention

Do not rotate the engine in the opposite direction. At all do not turn it for a bolt of fastening of a gear wheel of a cam-shaft.


6. Marks (arrow) on a flange of a cam-shaft and on a cover of the first bearing simultaneously should coincide. If these marks have not coincided, it is necessary to turn коленвал on one complete revolution.
7. Remove натяжитель chains.
8. Cars with a height regulator: unscrew the delivery oil pump and together with the connected hoses put aside. Remove a sealing ring of round section and a leading disk.
The prevention

Do not weaken both bolts with internal шестигранником for cover fastening. These bolts have a through carving which is visible between a cover and картером.


9. Designate position of a distributive gear wheel and a management chain rather each other by means of a varnish or штихеля, preliminary having wiped a rag this place on a chain and a cam-shaft gear wheel.
10. Fix a cam-shaft gear wheel for what insert into one of apertures in a gear wheel the probe or the big screw-driver.
11. Unscrew a fastening bolt, remove a distributive gear wheel. In cars with height adjustment Take поводковую a sleeve.
The prevention

The operating chain should remain further in gearing with gear wheels коленвала and the fuel pump. Phases газораспределения otherwise will change that can lead to malfunction of the engine.


12. An operating chain put aside and attach a wire to a head of the block of cylinders.
13. Note a varnish position of covers of bearings of a cam-shaft.
14. Unscrew covers of bearings of a cam-shaft.

The prevention

To avoid cam-shaft damages, it is necessary to observe sequence of unscrewing strictly.


15. At first unscrew both bolts on bearings of a camshaft 1, 3 and 5 (white arrows). Then ослабьте both bolts of covers of bearings 2 and 4 serially and gradually (accordingly on 1/2 turns and on one turn), counteraction (black arrows) will not act in film yet.
16. Take a cam-shaft upwards.
17. Take a washer (marksman) for axial fixing of a cam-shaft from a head of the block of cylinders and check up its condition, in case of need replace.
18. Extend тарельчатый a pusher by means of a rubber siphon (d 30 mm), for example, HAZET 735-2.

The prevention

Do not use for this operation a magnetic siphon: surfaces of sliding of a pusher are thus magnetised, and subsequently on them the smallest metal shaving that will lead to damage of pushers and cams can be besieged. The siphon can be made independently, using a household wall hook and a sucker.

Before extraction carefully clear a pusher surface.



Installation
The prevention

Establish only a cam-shaft with an index "13". The index is beaten out near to a label for a designation of position ВМТ on a cam-shaft flange.


PERFORMANCE ORDER
1. Carefully clear a cam-shaft and covers of bearings промывочным gasoline and oil, clear surfaces прилегания sealing linings.
2. A washer for axial fixing of a cam-shaft enter into a flute of a head of the block of cylinders.

The prevention

If the new cam-shaft is established or the head of the block of cylinders after fastening by bolts of covers of bearings it is necessary to check up a cam-shaft on smoothness of rotation was processed.


3. Grease a new cam-shaft with engine oil and insert into a head of the block of cylinders.
The prevention

Tarelchatye pushers remain dismantled.


4. Establish covers of bearings of a cam-shaft according to the resulted designations and in regular intervals screw up with the moment 25 Н.м. Thus rotate a cam-shaft.
5. For rotation of a cam-shaft instead of a fastening bolt screw in a bolt with internal шестигранником M 10х30 (01).
6. If the cam-shaft rotates hard, separately weaken bolts of covers of bearings, the jamming place will not be found yet.
7. Remove a cam-shaft and measure a place of landing of this bearing. Diameter of a basic neck: 30,934–30,950 mm.
8. If the former camshaft it should be checked up on palpation is mounted.
9. Grease тарельчатые pushers with engine oil and establish.
The prevention

Establish pushers on the same places, as before dismantling.


10. Grease a cam-shaft and put in a head of the block of cylinders so that marks ВМТ (arrow) have been directed vertically upwards. Thus pay attention to durability of landing of an axial lock washer.
11. Establish covers of bearings 2 and 4 and fix slightly bolts manually. Then serially twirl consistently fastening bolts on one turn and, at last, tighten with the moment 25 Н.м.
12. Other covers of bearings can be established in any sequence. The inhaling moment: 25 Н.м.
13. Unscrew a gear wheel of a camshaft from a head of the block of cylinders and so establish an operating chain that the put marks have coincided.
14. Put on a distributive gear wheel a camshaft flange. Align a distributive gear wheel by means of an adjusting pin.
15. In cars with height adjustment grease and establish поводковую a sleeve.
16. Twirl a distributive gear wheel with the moment 25 Н.м. And, at last, tighten a bolt рожковым a key on 90 (1/4 turns). At a tightening of a distributive gear wheel use as a countersupport a screw-driver or the probe.
17. Establish натяжитель chains.
18. Establish the delivery oil pump if it was dismantled, and screw on a flange with the moment 10 Н.м., preliminary having established a leading disk and a new condensing ring of round section.
19. Establish the engine in ВМТ ignitions and check coincidence of marks on a belt pulley of a cranked shaft and a flange of a camshaft (arrow).
20. Establish a cover of a head of the block of cylinders and twirl its bolts of fastening with the moment 10 Н.м. Before it check up a sealing lining on presence of damages and in case of need replace.
21. Establish a cross-section pipe of the air filter.
22. Connect a wire of "weight" of the accumulator (–).
23. Expose time for hours.
24. Set an anticreeping code of radio.
25. Warm up the engine and check up tightness of a cover of a head of the block of cylinders.