Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car



Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
- 4. Lubrication system
   4.2. Specification of engine oil
   4.3. Scope viscosity oils / class
   4.4. Oil consumption
   4.5. Contour of circulation of oil (DD)
   4.6. Oil reducing valve
   + 4.7. Oil pallet
   4.8. Oil level indicator
   4.9. The heat exchanger oil - / cooling liquid
   4.10. Diagnostics of malfunctions in an oil circulation contour
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electrical circuitries






4.6. Oil reducing valve

GENERAL INFORMATION

PETROL ENGINE

6-cylinder petrol engine


1. Oil pump. Soaks up engine oil via the soaking-up filter and the soaking-up pipe from the oil pallet
2. The longitudinal oil channel to an oil filter
5. Main oil channel
To basic sites
6. Oil jets. Engine oil is injected from below for cooling towards the bases of pistons
7. The delivery pipeline to a natyazhitel of a chain
8. Backpressure blocking valve
9. Natyazhitel of a chain
10. An opening for an exit of gases in sealing laying of a head of the block of cylinders
14. An oil jet for the operating chain
15. The delivery pipeline to a head of the block of cylinders
17. Oil throttle. Internal diameter is 4 mm
22. Oil channel. For lubricant of 12 dish-shaped pushers on the party of release
23. Oil channel. For lubricant of 12 dish-shaped pushers on the party of an admission
27. Camshaft regulator
30. Hydraulic dish-shaped pusher
and. The oil channel from the oil pump to the oil heater
b. The oil channel from an oil filter to basic surfaces
page. A drain opening in the oil pallet

The oil reducing valve is in the channel between the camera of absorption and the camera of compression of the oil pump. If oil pressure over 5 bars, the valve opens, and a part of oil can back join the camera of absorption of the pump.

If at the normal level of oil its pressure is not enough, check the valve.

Removal
1. Vinitovy stopper, SW22
2. Compression spring
3. The directing finger
4. Piston

PERFORMANCE ORDER
1. Disassemble the oil pallet.
2. Unscrew a screw stopper SW22 wrench.
Prevention

The screw stopper is under pressure of a spring of compression and can easily jump out.


3. Take a compression spring, the directing finger and the piston.
Prevention

The rigid or jammed piston can be taken by means of ring pincers.


4. Clean an opening in the oil pump and blow compressed air.
5. Several times move the piston of an opening of the oil pump backwards-forward. If the piston moves hardly, slightly level it a polishing cloth.

Installation

PERFORMANCE ORDER
1. If you replace the piston, then check ease of its course in an opening. If necessary, remove agnails in the piston with an emery cloth.
2. Install the piston with the directing finger and a new spring of compression.
3. Screw up a screw stopper without sealing ring and tighten with the moment 50 N. of m.

DIESEL ENGINE

The oil reducing valve is in the connecting channel between cameras of compression and absorption of the oil pump. If pressure exceeds 5 bars, the valve opens, and a part of oil is poured in the soaking-up camera. The valve should be checked if at the normal level of oil its pressure too low.

Removal


249. Vinitovy stopper, 50 N. of m.
250. The directing finger
251. Compression spring
252. Piston

PERFORMANCE ORDER
1. Remove the oil pallet.
2. Unscrew a screw stopper.
Prevention

The screw stopper is under pressure of a spring of compression and can easily jump out.


3. Take a compression spring, the directing finger and the piston.
Prevention

Take out the rigid or jammed piston by means of an external ring grip.


4. Clean the cylinder of the oil pump and blow compressed air.
5. Several times move the piston in the cylinder of the oil pump backwards-forward. If the piston hard moves in the cylinder, then slightly polish the piston on a fabric pritir.

Installation

PERFORMANCE ORDER
1. If the piston is replaced with new, check the new piston for ease of the course in the cylinder. In case of need remove agnails on the piston with an emery cloth.
2. Install the piston with the directing finger and a new spring of compression.
3. Twist a stopper without sealing ring and tighten with the moment 50 N. of m. The screw stopper is condensed with conical landing.