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


3.2.7. Camshaft

3.2.7.1. Engine in volume of 2,0 l

GENERAL INFORMATION

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

If details of a gazoraspredeleniye are used again, it is necessary to establish them on former places. To avoid confusion, it is necessary to make a special box for their storage.


Removal

PERFORMANCE ORDER
1. Disconnect a "weight" wire (–) from the accumulator.
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, markings on a case of a cam-shaft and a belt pulley of the crankshaft will not coincide yet. Instruction: the top dead point (VMT) is the highest situation 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 the provision of idling and by means of an asterisk strengthened by the central bolt of a belt pulley of the crankshaft turn the crankshaft in the direction of rotation of the engine, i.e. clockwise. Turn until marking "the Lake. T." (VMT) on a belt pulley will not be established under the index.
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. Markings (arrow) on a flange of a cam-shaft and on a cover of the first bearing at the same time should coincide. If these markings did not coincide, it is necessary to turn the crankshaft on one complete revolution.
7. Remove a natyazhitel of a chain.
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.
Prevention

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


9. Designate the provision of a distributive gear wheel and a management chain relatively each other by means of a varnish or штихеля, previously 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 openings in a gear wheel the probe or a big screw-driver.
11. Unscrew a fastening bolt, remove a distributive gear wheel. In cars with adjustment of height Take a freshet sleeve.
Prevention

The operating chain should remain further in gearing with gear wheels of the crankshaft and the fuel pump. Gazoraspredeleniye phases that can result in malfunction of the engine otherwise will change.


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

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 shooters). Then weaken both bolts of covers of bearings 2 and 4 serially and gradually (respectively on 1/2 turns and on one turn), counteraction (black shooters) will not act in film yet.
16. Take a cam-shaft up.
17. Take a washer (shooter) for axial fixing of a cam-shaft from a head of the block of cylinders and check its condition, in case of need replace.
18. Extend a tarelchaty pusher by means of a rubber siphon (d of 30 mm), for example, HAZET 735-2.

Prevention

Do not use for this operation a magnetic siphon: surfaces of sliding of a pusher are thus magnetized, 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
Prevention

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


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

Prevention

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


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

Tarelchatye pushers remain dismantled.


4. Establish covers of bearings of a cam-shaft according to the given designations and evenly screw up with the moment of 25 N of m. Thus rotate a cam-shaft.
5. For cam-shaft rotation instead of a bolt of fastening screw in a bolt with an internal shestigrannik of 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 is mounted, it should be checked on palpation.
9. Grease tarelchaty pushers with engine oil and establish.
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 marking VMT (arrow) was directed vertically up. 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 of 25 N of m.
12. Other covers of bearings can be established in any sequence. Inhaling moment: 25 N of m.
13. Unscrew a camshaft gear wheel from a head of the block of cylinders and so establish an operating chain that the put markings 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 adjustment of height grease and establish a freshet sleeve.
16. Twirl a distributive gear wheel with the moment of 25 N of m and, at last, tighten a bolt a rozhkovy 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 a natyazhitel of a chain.
18. Establish the delivery oil pump if it was dismantled, and screw on a flange with the moment of 10 N of m, previously having established a leading disk and a new condensing ring of round section.
19. Establish the engine in VMT of ignition and check coincidence of markings 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 of 10 N of m. Before it check sealing laying on existence 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 on hours.
24. Set an anticreeping code of radio.
25. Warm up the engine and check tightness of a cover of a head of the block of cylinders.