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






Replacement of a chain of the GRM drive

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


Removal of a chain of the GRM drive

01 — Cores
04, 05 — Wedges
2 — the Top directing lever

4 — a GRM drive Chain
8 — Plastina


 PERFORMANCE ORDER

1. Bring the engine into situation 45 ° before VMT of the piston of the first cylinder in situation.
2. Block cores (01) camshafts of the right head of the block of cylinders.
3. Remove a natyazhitel of a chain of the GRM drive and the right tension lever (2) from above.
4. Block a chain on asterisks of camshafts by means of wedges (04) and (05).
5. Vypressuyte a finger of a chain (4) between inlet and final asterisks.
6. By means of the screw-driver remove a plate (8) chains (4).
7. Take a dual link of a chain (4).
8. Attach a new chain (5) to old (4) by means of a link (6) and an intermediate plate (7) (thickness of 1.6 mm) and an external plate (8).
9. Take fingers (01).


Replacement of a chain of the GRM drive

01 — Cores
04, 05 — Wedges
4 — the Old chain
5 — the New chain

6 — the Connecting link
7 — the Intermediate case
8 — the External plate
10 — the Key


 PERFORMANCE ORDER

1. Remove a wedge (05), pressing a hand a chain to asterisks of camshafts at this stage.
2. Weaken the provision of a wedge (04) on an asterisk of a final shaft.
3. Rotate a bent shaft by means of a key (10), pressing a hand a chain to asterisks of camshafts. Make sure that the chain did not move at rotation. At the same time the new chain has to be established in GRM cover.
4. Disconnect the end of an old chain (4) from a new chain (5).
5. Rotate a bent shaft until there are opportunities to connect the ends of a new chain by means of a connecting link.
6. Establish wedges (04) and (05) on asterisks.
7. Connect a new chain (5) a link (6) and a plate (7).


Assembly of a chain of the GRM drive

1 — Capture
2 — the Mobile persistent plate

8 — the External plate
06 — the Bolt


 PERFORMANCE ORDER

1. Establish capture (1) of a press and insert a chain into it. Screw a bolt (28).
2. Establish a mobile persistent plate (2).
3. Insert an external plate (8) (thickness of 1.2 mm) into a mobile persistent plate.
4. Chain a press.
5. Screw a bolt (06) and press a chain. Make sure that fingers of a connecting link are pressed in an external plate (8).
6. Remove a press.


Assembly of a chain of the GRM drive


 PERFORMANCE ORDER

1. Move a persistent plate (shooter) (2) back.
2. Establish a press over the central finger.
3. Tighten a bolt (06) the moment of 30 Nanometers.
4. Fingers of a connecting link (6) are pressed separately.
5. Check a press fitting (arrows) and, if necessary, repeat it.
6. Install camshafts in control situation.
7. Establish a natyazhitel of a chain.
8. Check control position of camshafts.





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