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
      3.1.9.2. The engine обьемом 2,2 l
      + 3.1.9.3. The 6-cylinder engine
   + 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
   + 3.2.9. 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







3.1.9. A head of the block of cylinders

3.1.9.1. The 4-cylinder engine
THE GENERAL DATA

Bolts of a head of the block of cylinders


Remove a head of the block of cylinders only at the cooled engine. Final and inlet collectors remain connected.

The defective sealing lining of a head of the block of cylinders is distinguished to following signs:

 – Capacity loss;
 – Leak of a cooling liquid, exhaust gas of white colour at the heated-up engine;
 – Oil leak;
 – The cooling liquid in engine oil, oil level does not fall, and increases;
 – Grey colour of engine oil, foam shreds on маслоизмерительном щупе, oil liquid;
 – Engine oil in a cooling liquid;
 – The cooling liquid strongly rages;
 – There is no compression in two next cylinders.

Removal
PERFORMANCE ORDER
1. Преподнимите an engine cowl.
2. Disconnect a wire of "weight" of the battery (–).
The prevention

At a battery detachment the anticreeping code of radio is erased. Instructions see in subsection 14.1.7.


3. Remove the case of a head of the block of cylinders.
4. Remove a temperature regulator of a cooling liquid (thermostat).
5. Turn off two bolts in diameter of 8 mm (1) from both parties of a forward covering (23). Behind a covering there are unloading plugs.
6. Unscrew bolts (2) (diameter of a carving of 6 mm).
7. Remove a covering (23), thus track a sealing ring of round section between a covering and a head of the block of cylinders. Clean sealing surfaces.
8. Unscrew an inlet gas pipeline (19) from a head of the block of cylinders and put aside with the connected wires.
9. Unscrew the holder (2) item gauges коленвала, located behind a head of the block of cylinders.
10. Disconnect ventilating hoses (6) in the bottom of a head of the block of cylinders.
11. Disconnect штеккер ljambda-probe connections (in the field of the storage battery).
12. Unscrew directing tube маслоизмерительного щупа in a head of the block of cylinders. At an automatic transmission unscrew also directing tube масломерного devices behind a head of the block of cylinders.
13. Lower cooling liquid, including from картера a cranked shaft.
14. Unscrew an exhaust pipe from a final collector.
15. The engine in volume of 2,2 l: turn a cam-shaft regulator to the right against the stop in a direction "spat" (late).
16. Establish the engine on 20 after ВМТ ignitions of the first cylinder and remove натяжитель chains.
17. Designate a paint position of an operating chain in relation to both gear wheels of a cam-shaft, having put a stroke through a chain and a chain wheel.
18. Unscrew a pulley of a final cam-shaft from a flange of a cranked shaft.
19. The engine in volume of 2,0 l: unscrew a gear wheel of an inlet cam-shaft.
20. The engine in volume of 2,2 l: holding an anchor (2) regulators of a cam-shaft, unscrew a bolt with a fillet (1). Remove an anchor from the operating piston (18). Unscrew a nut (6).
21. Remove an operating chain.
22. The engine in volume of 2,2 l: designate position of a gear wheel of an inlet cam-shaft in relation to a shaft with a flange, having spent a paint a stroke through both details. Uncover (12), a gear wheel of an inlet cam-shaft (13), the adjusting piston (14) and a spherical spring (14а). Dismantle a shaft with a flange (16).
23. Extend by means of shock вытягивателя or the suitable tool directing fingers (11).
24. Unscrew four combined bolts () between the top and bottom cover картера chains. Unscrew bolts of a head of the block of cylinders in sequence, their return numbering in drawing, i.e. From the tenth on the first. The nozzle on a wrench, for example, HAZET 990 SLg-12 (fig. Bolts of a head of the block of cylinders see) is for this purpose necessary.
25. Raise a head of the block of cylinders. It can be made also by means of the crane, having passed in eyes a corresponding cable or a chain.

Installation

PERFORMANCE ORDER
1. Before assemblage clear approaching шабером a head of the block of cylinders and the block of cylinders of the hermetic rests. Track, that these rests have not got to apertures. For this purpose close apertures a rag.
2. Check up by means of a steel ruler a head of the block of cylinders and the motor block on planeness in longitudinal and cross-section directions, if necessary – finish (in repair shop).
3. Check up a head of the block of cylinders on absence of cracks, and a working surface of the cylinder on absence рисок, scratches.
4. Clear apertures of bolts of a head of the block of cylinders of oil and other adjournment.
5. Necessarily replace a sealing lining of a head of the block of cylinders.
6. Impose a new sealing lining without hermetic so that apertures have not been closed.
7. Establish a head of the block of cylinders. Before installation be convinced that camshafts and a cranked shaft stand, as at dismantle, and are not turned.
The prevention

The head of the block of cylinders is aligned in the block of cylinders by adjusting pins.


8. Measure length of bolts of a head of the block of cylinders which in a new condition makes 102 mm. At a tightening adhere to this length. At length of 105 mm replace bolts of a head of the block of cylinders.
9. Oil a carving of bolts of a head of the block of cylinders and their place прилегания to a block head, establish bolts and twirl manually.
10. Tighten bolts of a head of the block of cylinders in sequence from 1 to 10 (fig. Bolts of a head of the block of cylinders see) in three stages.
The prevention

Carefully tighten bolts of a head of the block of cylinders. Before a tightening check up динамометрический a key on accuracy.


At first tighten bolts of a head of cylinders динамометрическим a key consistently with 1 on 10 with the moment 55 Н.м. At the second stage all bolts with 1 on 10 tighten for 90 рожковым a key. At the third stage tighten bolts of a head of the block of cylinders with 1 on 10 on 90 in the same direction рожковым a key.
The prevention

At a tightening of bolts of a head of the block of cylinders arrange the handle of a wrench along the engine and turn one movement before its installation across – for turn on 90 .


11. The combined bolts () covers of the case of management tighten with the moment 20 Н.м.
12. Cover directing fingers with hermetic Mercedes N 002 989 00 20 10 or other suitable hermetic and drive.