Mercedes S-Class W-140

1991-1999 of release

Repair and operation of the car



Mercedes S-Class
+ Mercedes-Benz cars of the class S (W-140)
+ Operation manual
+ Routine maintenance
- Engine
   Check of a compression in engine cylinders
   Check of the engine by means of the vacuum gage
   Belt of the streaming drive of auxiliary units
   + 6-cylinder petrol engines (M104.944 and M104.990/994)
   - 8-cylinder petrol engines (M119.970/981 and M119.971/981)
      Covers of heads of the block of cylinders - installation details
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
      Removal and installation of heads of the block of cylinders
      Removal and installation of covers of a chain of the GRM drive
      Replacement of a chain of the GRM drive
      Check of phases of gas distribution
      The GRM drive - the general information, service of components
      Removal and installation of the regulator of phases of gas distribution
      Removal and installation of camshafts
      Check and adjustment of control position of camshafts
      Removal and installation of valves
      Replacement of the directing plugs of valves
      Replacement of rings of saddles of valves
      Removal and installation of pistons
      Designation and sizes of pistons
      Check of a condition of rods
      Check of a condition of a bent shaft
   + 12-cylinder petrol engines (M120.980/982)
   + 6-cylinder diesel engines (OM603.971)
   + 6-cylinder diesel engines (OM606.961)
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Removal and installation of camshafts

see also Section GRM Drive - the general information, service of components.


Arrangement of camshafts

1, 1a, 2, 2a — the Top sliding levers
5, 6, 7, 8 — Camshafts
10, 12 — Covers
13 — Natyazhitel of a chain
14 — a camshaft bearing Cover


The sizes of camshafts are specified in Specifications.

Covers of camshafts have sequential numbering, since a forward cover of the right final camshaft. Numbers are beaten out on heads of the block of cylinders. Covers of bearings have to be established in the same situation.

Removal

 PERFORMANCE ORDER

1. Install the piston of the first cylinder in situation 45 ° before VMT.
2. Remove the top forward cover.
3. Mark the mutual provision of a chain of the GRM drive concerning asterisks of camshafts.
4. Remove a natyazhitel of a chain of the GRM drive.
5. Remove the top sliding levers.
6. Remove a GRM drive chain from asterisks of camshafts. Turn camshafts by means of a key (1) so that cams were not pressed hydrocompensators (see сопр. illustration). Turn right final and right inlet asterisks approximately on 6 teeths in the direction of rotation of the engine. Turn the left inlet asterisk approximately on 10 teeths in the direction opposite to the direction of rotation of the engine. Turn the left final asterisk approximately on 14 teeths in the direction of rotation of the engine.
7. Weaken covers of bearings of camshafts consistently so that to prevent any unilateral tension of the camshaft.
8. Uncover bearings and camshafts together with asterisks and regulators.

Installation

Deployment in control position of the right camshaft

1 — the Fixing cores
3 — the Key


 PERFORMANCE ORDER

1. Grease hydrocompensators and necks of bearings of camshafts.
2. Install the left inlet and final camshafts with a GRM drive chain on asterisks, but without tension.
3. Oil covers of bearings, establish and tighten bolts of their fastening to 10 Nanometers.
4. Turn the camshaft by means of a key (3) and check ease of rotation.
5. Turn the left final camshaft by means of a key (3) in control situation. Establish a GRM drive chain in earlier noted situation, previously having blocked the camshaft a core (1).
6. Turn the left inlet camshaft by means of a key (3) in control situation. Establish a GRM drive chain in the early noted situation, previously having blocked the camshaft a core (1). The camshaft is in situation "lags".
7. Install the right inlet and final camshafts with a GRM drive chain on asterisks, but without tension.
8. Oil covers of bearings, establish and tighten bolts of their fastening to 12 Nanometers.
9. Turn camshafts and check ease of rotation.
10. Install the right inlet camshaft in control situation. Establish a GRM drive chain in earlier noted situation, previously having blocked the camshaft a core (1). The camshaft is in situation "lags".
11. Install the right final camshaft in control situation. Establish a GRM drive chain in earlier noted situation, previously having blocked the camshaft a core (1).
12. Further installation is made as it should be, the return to removal.
13. Check control position of camshafts.











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