Mercedes C-Class

W203 since 2000 of release

Repair and car operation


Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
- Engine
   Compression check in engine cylinders
   Engine check by means of the vacuum gage
   Removal and installation of a cover of an impellent compartment from the bottom
   + 4-cylinder petrol engines
   - 6-cylinder petrol engines
      Removal and installation of a head of cylinders
      Replacement of chains of a drive of GRM and installation of phases of a gazoraspredeleniye
      Removal and installation of a maple belt
   + Diesel engines
   + System of greasing of the engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment





Replacement of chains of a drive of GRM and installation of phases of a gazoraspredeleniye

Scheme of a chain drive of the gas-distributing mechanism (GRM) and stages of procedure of installation of phases of a gazoraspredeleniye. V6 engines


The adjusting provision of camshafts «40 ° after VMT of the piston of the first cylinder». All four copper plates of a chain at the same time coincide with labels of asterisks

1 — the Groove in a camshaft
2 — the Label on the right asterisk of a camshaft
3 — the Label on the left asterisk of a camshaft 		4 — the Label on an asterisk of a balancing shaft
5 — the Groove in a cranked shaft
6 — the Copper plate

Special tools:

Cover for camshaft fixing - No. 112589054000.
Key for camshaft fixing - No. 112589000100.
Key under a bolt of an asterisk of a camshaft - No. 112589010300.
The adaptation for fixing of the left camshaft - No. 112589013200.
The adaptation for fixing of the right camshaft - No. 112589003200.
The adaptation for fixing of a pulley of a cranked shaft - No. 112589004000.
The adaptation for flywheel blocking - No. 112589034000.
Set for division of links of a gas-distributing chain - No. 602589024000.
Divider of links of a gas-distributing chain (element 1) - No. 602589023300.
Divider of links of a gas-distributing chain (element 2) - No. 602589056300.
Divider of links of a gas-distributing chain (element 3) - No. 602589056301.
The adaptation for joining of links of a chain - No. 602589003900.
Set of dies for joining of links of a chain - No. 103589016300.
Tool box - No. 602589009800.
Adaptations for chain fixing on asterisks of camshafts - No. 112589044000.
The holder of a pulley of the vyazkostny coupling - No. 113589004000.
Key for fixing of the vyazkostny coupling - No. 113589000100.

General measures of precaution

 PERFORMANCE ORDER

1. Disconnect a negative wire from the battery.
2. Turn out spark plugs for the purpose of simplification of a provorachivaniye of the engine.
3. If the return is not stipulated especially, turn the engine in the normal direction.
4. Familiarize with the requirements shown to efforts of a tightening of carving connections.
5. At the corresponding complete set mark position of the CKP sensor before its removal.
6. Do not turn a cranked shaft by means of driving asterisks of a camshaft or devices.
7. Do not turn cranked and distributive shaft at the removed chain of a drive of GRM.


Procedures of installation of phases of a gazoraspredeleniye

 PERFORMANCE ORDER

1. Bring the piston of the first cylinder [1] into situation 40 ° after VMT.
2. Make sure of correctness of combination of parallel flutes of both camshafts with a cut of a head of cylinders [2].
3. Establish on camshafts blocking adaptations [3].
4. Check correctness of an arrangement of adjusting labels of a balancing shaft [4].
5. Before starting performance of repair procedures, remove assembly of a natyazhitel [5].

At installation of the piston of the first cylinder in situation 40 ° after VMT camshafts can be turned without risk of contact of valves with the bottoms of pistons.

6. At assembly bring the piston of the first cylinder into situation 40 ° after VMT and achieve combination of omednenny links of a chain with:

· Adjusting labels of asterisks of both camshafts [6];
· With an adjusting label on an asterisk of a balancing shaft [7];
· With a shponka and an adjusting label of a cranked shaft [8].

On termination of installation combination of omednenny links of a chain should occur on every fourteenth turn.


Replacement of a gas-distributing chain

 PERFORMANCE ORDER

1. Remove assembly of an axis of yokes of the right camshaft assembled with covers of bearings;
2. Without tightening fixture, establish a cover of fixing of a camshaft [9] (tool No. 112589054000);
3. Establish adaptations for chain fixing on asterisks of camshafts (tool No. 112589044000);
4. By means of adaptations from given above the list connect a new chain to old on the right number of cylinders, - for chain putting on on asterisks turn a cranked shaft.

Bolts of fastening of assemblies of axes of yokes (М7 x 84 mm) are not subject to a reuse and should be replaced.


Removal of a balancing shaft is made in the following order:

 PERFORMANCE ORDER

1. Pass a suitable blocking core in a counterbalance on a back pin of a shaft [11];
2. Turn out a fixing bolt and remove a counterbalance;
3. From the forward party take a balancing shaft;
4. On termination of repair work establish a natyazhitel.
5. In the course of assembly do not forget to grease the central bolt of a pulley of a cranked shaft.

Do not block a flywheel / a driving disk at removal/installation of a bolt of a pulley of a cranked shaft.