Mercedes C-Class

W203 since 2000 of release

Repair and car operation

+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
- Power supply system and release
   + Power supply system of the petrol and diesel engine
   + System of injection of fuel of the petrol engine
   - System of injection of fuel of the diesel engine. Turbokompressor
      Removal and installation of nozzles
      Air removal from a contour of low pressure of fuel
      Checks of system of injection of fuel
   + Systems of release and decrease in toxicity of the fulfilled gases. Turbokompressor
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

Removal and installation of nozzles

The fuel distributive highway with nozzles

1 — the Lock spring
2 — the Screw, 7Нм + 90 °
3 — the Coupling collar
4 — the Nozzle
5 — the Sealing ring
6 — the pressure Sensor, 22Нм, the engine 611 to the manager. No. 86512: 20Нм
7 — ТНВД
8 — the Holder, the fuel distributive highway to a head of cylinders
9 — the Holder, the fuel highway to a head of cylinders
10 — the Fuel distributive highway
11 — the Bolt
12 — the Valve of adjustment of pressure, the inhaling moment:
1st reception 3Нм
2nd reception 5Нм
And — At installation a nozzle grease with a thin layer of special greasing only in this range.



Removal of one nozzle is described, procedure for other nozzles is similar.

1. Remove the top covers of the engine, address to the Section Removal and installation of the top cover of the engine.
2. Disunite the nozzle socket.
3. Remove the pipeline of injection going to a nozzle. At an otvorachivaniye of a cap nut hold a nozzle a wrench.

Pipelines at removal do not deform. After removal the pipeline close on the ends. Watch that dirt did not get to pipelines. Check connecting cones of pipelines of injection. In the presence of dents the pipeline replace.

4. Press a lock bracket in a place of connection of the drainage pipeline and disconnect the pipeline.

The lock bracket remains on a nozzle. If a bracket to remove, it will be necessary to replace it with the new.

5. Turn out the Torx screw on a coupling collar.
6. Take out a nozzle from a carving adapter together with a coupling collar by means of the corresponding screw-driver.

Strongly sitting nozzle is taken out by means of a shock stripper and the corresponding capture. If the stripper rests against a head of cylinders, unscrew bolts of fastening of a cover of a head of cylinders or remove by means of a carving adapter of a nozzle.

At removal by means of a carving adapter it is necessary to replace a nozzle in a set.

7. Clear a core and nozzles of nozzles a wire brush, thus the working part of a nozzle should be cleared only by means of well absorbing fabric. Before cleaning of assembly mine a nozzle opening in mine close a pin. Assembly mine clear at first well absorbing fabric, then a round and cylindrical brush, then blow and close. After that once again clear well absorbing fabric and close. After cleaning take out a pin from a nozzle opening.

Mine of a nozzle clear only a hand (it is not necessary to apply for this purpose a drill). The nozzle should not be assorted.



1. Grease with a thin layer of special greasing a nozzle core in the area "and", for example, MERCEDES-BENZ 001 989 42 51 10.

Greasing should not get on a working part of a nozzle and on a sealing ring.

2. Establish a nozzle into place with a new sealing ring and a coupling collar.
3. Screw the new Torx screw, without tightening it.

The screw should be rolled easily. Otherwise the carving is necessary for passing a lerka.

4. Unscrew bolts of fastening of the fuel distributive highway. It is necessary for installation of the pipeline of injection without additional effort.
5. Fix a cap nut the injection pipeline on a nozzle, without tightening a nut.
6. Tighten bolts of fastening of the fuel distributive highway the moment 14Нм.
7. Fix the new Torx screw of a coupling collar the moment 7Нм. Then tighten the screw on a corner 90 ° (Ѕ a turn).
8. Tighten cap nuts of fastening of the pipeline of injection, holding a nozzle from a provorachivaniye. Moment of an inhaling of a new nut: 20Нм, again applied: 25Нм.

At all do not exceed the inhaling moment. Otherwise at the following otvorachivaniye the carving union will not turn on.

9. Establish into place the drainage pipeline and fix it a wire bracket.
10. Join the nozzle socket.
11. Establish the top covers of the engine, address to the Section Removal and installation of the top cover of the engine.