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
   - 3.2.8. A head of the block of cylinders
      3.2.8.2. The engine in volume of 2,2/2,5 l
   + 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







3.2.8. A head of the block of cylinders

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

Placing of bolts of a head of the block of cylinders


Remove a head of the block of cylinders only at the cooled engine. Thus the final collector does not act in film.

The defective sealing lining of a head of the block of cylinders is distinguished on one or several signs:

 – Capacity loss;
 – Leak of a cooling liquid, white final gas at нагретом the engine;
 – Oil leak;
 – The cooling liquid in engine oil, oil level does not decrease, and increases, foam shreds on the index of level of oil; grey colour, разжижение engine oil;
 – Engine oil in a cooling liquid;
 – The cooling liquid strongly rages;
 – Absence of a compression in two next cylinders.

Removal
PERFORMANCE ORDER
1. Raise a cowl.
2. Disconnect a wire of "weight" of the battery.
The prevention

The anticreeping code of radio is thus erased.


3. Remove the air filter.
4. Remove a cross-section pipe and soaking up hose of the air filter.
5. Lower cooling liquid.
6. Remove a radiator.
7. Ослабьте ridge клиновой a belt also remove it.
8. Remove pulling device ridge клинового a belt.
9. Clamp with the help шланговых clips топливопроводы in the holder of the fuel filter.

The prevention

For simplification of the subsequent installation mark топливопроводы a sticky tape. The acted fuel clean a rag.


10. Unscrew two bolts of fastening of the holder and remove the holder with the fuel filter.
11. Unscrew the holder (62) directing pipes of a measuring instrument of level of oil.
12. Remove a hose with рециркуляционного the valve of the final device (marksman), the leader to the air pipe case.
13. Remove a hose between рециркуляционным the valve of the final device and an inlet pipe.
14. Unscrew a lateral support (5) transmissions (1) and an exhaust pipe (2).
15. Unscrew a forward exhaust pipe from a collector.
16. Remove atomizers.
17. Remove a clamp (91) submitting lines of heating by means of a self-made hook (01).
18. Unscrew tap of a pipe (93) from the oil filter and remove from a branch pipe (89).
19. Unscrew electric wires from candles накаливания, preliminary having marked a sticky tape.
20. Remove a 36-contact socket (Х26/2).
21. Remove an inlet gas pipeline.
22. Uncover heads of the block of cylinders.
23. Establish the engine in position ВМТ of ignition of the first cylinder.
24. Disassemble натяжитель chains.
25. Remove a camshaft, having designated position of a chain of management and a distributive gear wheel by means of a varnish or штихеля.
26. Beat out two fingers (221) and (222) by means of a hairpin with carving М6 and a pusher.
27. If such tool is not present, it is possible to take fingers by means of a chain asterisk with ten зубчиками (length of a tetrahedron – 1/2 inches) and bolt М6 having about threefold length of an asterisk. For this purpose wind on bolt М6 a counternut, then establish on it прокладочную a washer. Spread on a finger an asterisk, screw in bolt М6 in a carving of a finger and twirl a counternut before its contact with an asterisk. The prokladochnaja washer serves for improvement прилегания surfaces. Extend a finger, keeping a bolt head накидным a wrench and simultaneously turning a counternut рожковым a key concerning an asterisk.
28. Take directing tyre of an operating chain.
29. Unscrew two bolts М8 of a head of the block of cylinders by means of long face key SW 6.
30. Unscrew bolts of a head of the block of cylinders in sequence, their return numbering, i.e. With 18 on 1 (cм. Fig. Placing of bolts of a head of the block of cylinders). Thus at first unscrew all bolts on 1/2 turns and then unscrew completely, using a nozzle for a face key, for example, HAZET 2751.
31. Raise a head of the block of cylinders, for example, by means of the crane. Points of fastening of an elevating cable are an eye in front at the left and tap of a final collector behind on the right.

Installation

PERFORMANCE ORDER
1. A hermetic sealing surface clear of the rests of hermetic by means of a corresponding scraper. Track, that the dirt has not got to apertures of the motor block. Apertures cover with a rag.
The prevention

Apertures for bolts of a head of the block of cylinders should not be hammered the rests of oil and a cooling liquid. Blow apertures the compressed air or clean the screw-driver which has been wrapped up by a rag, and a liquid suck away. Otherwise at a twisting of new bolts there will be a pressure which can lead to cracks in the motor block or to the wrong moment of an inhaling of bolts.


2. Check planeness of the motor block.
3. Impose a new sealing lining of a head of the block of cylinders without hermetic on a fat-free sealing surface so that apertures have not been closed.
4. Clear a sealing surface of a head of the block of cylinders.
5. Check up planeness of a head of the block.
6. Establish a head of the block of cylinders.
7. Measure length (L) bolts of a head of the block of cylinders. If the maximum length (Bolts of a head of the block of cylinders see the table) is exceeded, at all do not use such bolts.
8. Grease with engine oil a carving and a surface adjoining to a head of a bolt. Check up bolts on absence of cracks and in case of need replace. Twist bolts in a head of the block of cylinders and tighten manually (Placing of bolts of a head of the block of cylinders see the table).
The prevention

Bolts of a head of the block of cylinders should be established without прокладочных washers. Carefully tighten bolts. Check up preliminary accuracy динамометрического a key.


Bolts of a head of the block of cylinders are tightened in sequence from 1 to 18 in four stages (cм. Fig. Placing of bolts of a head of the block of cylinders).
The prevention

Bolts of a head of the block of cylinders at each step are accordingly tightened in sequence from 1st to 18th.


The first stage: динамометрическим a key with the moment 15 Н.м.
The second stage: динамометрическим a key with the moment 35 Н.м.
The third stage: рожковым a key tighten bolts in the same direction on 90 .
The prevention

In this place make a 10-minute pause in an inhaling of bolts. Then continue to tighten bolts, without weakening them.


The fourth stage: рожковым a key tighten bolts for 90 .
The prevention

At a tightening of bolts the key handle hold along the engine and turn its one movement while the handle does not become across the engine (1/4 turns = 90 ).


9. On two bolts М8 () in front of a head of the block of cylinders establish elastic washers and tighten long face key SW6 with the moment 25 Н.м.
10. Establish directing tyre of a chain of management, insert fingers, preliminary having greased their fillets герметизирующим компаундом, for example, Mercedes-001 589 2520.
11. Establish a camshaft.
12. Establish натяжитель chains.
13. Establish the engine in position ВМТ of ignition and check camshaft position.
14. Establish a head of the block of cylinders.
15. Establish an inlet gas pipeline.
16. Establish a 36-contact socket.
17. Screw electric wires of candles накаливания.
18. Establish a knee of a pipe with a new sealing ring and fasten a knee to the air filter.
The prevention

The ring of round section for installation improvement can be lowered in cooling liquid. At all do not use greasing or oil.


19. Establish submitting line of heating and put on fixing clips.
20. Screw a forward exhaust pipe on a collector with the moment 25 Н.м.
21. Screw with the moment 25 Н.м. The holder of a transmission and a forward exhaust pipe.
22. Establish a hose from рециркуляционного the valve of departing gases to the air pipe case, and also a hose between рециркуляционным the valve and an inlet pipe.
23. Screw the holder of a directing tube маслоизмерительного щупа.
24. Establish the fuel filter with the holder and fasten to a head of the block of cylinders with the moment 25 Н.м.
25. Screw топливопроводы with new sealing linings on the fuel filter. Remove шланговые clips.
26. Establish pulling device for ridge клинового a belt.
27. Impose and pull ridge клиновой a belt.
28. Establish a radiator.
29. Establish a cross-section pipe of the air filter and a hose всасывания air.
30. Establish the air filter.
31. Fill in cooling liquid.
32. Connect to the battery "a weight" wire (–).
33. Expose hours.
34. Set an anticreeping code of radio.
The prevention

If the sealing lining of a head of the block of cylinders was defective, replace engine oil and the oil filter.


35. Warm up the engine to working temperature and check up tightness of all elements of connection.
The prevention

Pulling up of bolts of a head of the block of cylinders is forbidden.


36. In summary press a key of an unblocking of a cowl of the engine on the left arm.

Bolts of a head of the block of cylinders


DIAMETER OF THE CARVING
LENGTH FOR NEW INSTALLATION
THE MAXIMUM LENGTH
M 10
80,0 mm
83,6 mm
M 10
102,0 mm
105,6 mm
M 10
115,0 mm
118,6 mm

Placing of bolts of a head of the block of cylinders

THE SIZE OF THE BOLT
№ APERTURES
M 10–80
3, 5, 11, 13
M 10–102
2, 4, 6, 8, 10, 12, 14, 16, 18
M 10–115
1, 7, 9, 15, 17
M 8–30
a (area картера chains)
M 8–80
b (the fuel filter)