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







3.1.11. Hydraulic тарельчатые pushers
THE GENERAL DATA

All engines are equipped hydraulic тарельчатыми by pushers. Thanks to it noise in a drive of valves decreases and, besides, adjustment of a backlash of valves within the limits of maintenance service is not required.


At engine rotation тарельчатый the pusher (203) unloads, if the cam (184) camshafts is directed upwards. The spring (d) wrings out compensating element (204), and it adjoins below to a core of the valve (195), and above the press plug () presses on тарельчатый a pusher (203) in a camshaft direction. In this position engine oil through a small aperture () joins or pours out from the working chamber (). As soon as тарельчатый the pusher again unloads, thanks to turn of a cam of a rotating camshaft the ball valve (b) is closed, and the closed oil operates as a firm body. The length (L), thus, adapts at each turn of a camshaft to respective alterations of the size of details in a valve drive. Repair тарельчатого a pusher is impossible.
The prevention

Noise in a drive of valves at engine start – the normal phenomenon. At the stopped engine, depending on cam position, it is pushed out more or less oils from separate клапанного a pusher. It causes noise while the hydraulic pusher at engine rotation again will not be filled with oil. Depending on circumstances, this process can proceed until the engine will not get warm to working temperature. To provide faultless functioning of a hydraulic pusher, in a head of the block of cylinders there is a blocking device рециркуляции oil which provides full опорожнение from oil of oil channels in a head of the block of cylinders at the stopped engine.


The control

The control of a hydraulic pusher should be made, if at achievement by the engine of working temperature noise in a valve drive proceeds.

PERFORMANCE ORDER
1. Pass with the heated-up engine. After achievement by a cooling liquid of working temperature continue movement on 5 km to provide sufficient temperature of engine oil.
2. If the hydraulic pusher still rustles, stop the engine and uncover heads of the block of cylinders.
3. Turn a camshaft so that cams of the cylinder subject to check have been directed upwards. For this purpose establish a transmission on idling, tighten a lay brake and turn a cranked shaft for a bolt of fastening of a belt pulley a suitable wrench clockwise.
4. Press on тарельчатый a pusher a wooden or plastic core in a direction downwards. If thus тарельчатый the pusher moves downwards easier, than others it is necessary to replace it.