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
   + 3.2.9. 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

3.2.15. A head of the block of cylinders and the motor block

PERFORMANCE ORDER

1. Remove a head of the block of cylinders.

2. Check up a head of the block of cylinders / the motor block on a deflection at length and width by means of a ruler and a set of templates. On all length the deflection should not exceed 0,08 mm. On all width of a deflection should not be.

3. Check up planeness of a head of the block of cylinders also on the top sealing surface to a cover of a head of the block of cylinders. The maximum deviation should make no more than 0,1 mm.
The prevention
If on a partition between the entrance and target valve lungs of scratches in replacement of a head of the block of cylinders there is no necessity are found out. If the surface of a head of the block of cylinders, especially a surface of division of chambers of combustion, rough, deformed or has type small damages рисок, scratches etc., – that the damaged surfaces grind. It does not concern a sealing surface of a cover of a head of the block of cylinders.

4. The engine in volume of 2,0 l: the general height of a head of the block of cylinders makes Н = 142,9–143,1 mm.
After grinding the height of a head of the block of cylinders should be not less Н = 142,2 mm.
The height of microroughnesses of a sealing surface should not be more than 0,004 mm. At distance from the end of a core of the valve to a surface of the bearing of camshaft Н1 = 20,4–21,4 mm it is possible to use this valve further. At Н1 = 21,4–21,97 mm it is necessary to establish the new valve in length of 106,4 mm. At Н1 = 19,5–20,3 mm it is possible to establish the repaired valve in length of 105,5 mm.
After possible polishing of a surface of the motor block pay attention to the maximum size of a ledge of the piston which should be 0,74–0,96 mm. At a ledge of 0,96-1,16 mm establish thicker sealing lining of a head of the block of cylinders (1,85 mm).
In the ground head of the block of cylinders before its installation it is necessary to check up valve backlog () and a prechamber ledge. A prechamber ledge: 7,6–8,1 mm.

5. Check up phases газораспределения the engine.

6. Establish a head of the block of cylinders.