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)
      Cover of a head of the block of cylinders - installation details
      Removal and installation of the inlet pipeline with the resonator (except the engine 104.990)
      Final collector (except the engine M 104.990) - installation details
      Removal and installation of a head of the block of cylinders
      Removal and installation of a cover of a chain of the GRM drive
      The GRM drive - the general information, service of components
      Asterisk of a bent shaft - an installation detail
      Removal and installation of the regulator of the camshaft
      Removal and installation of camshafts
      Replacement of the directing plugs of valves
      Replacement of saddles of valves
      Removal and installation of pistons
      Replacement of piston rings
      Check of a condition of rods
      Check of a condition of a bent shaft
      Service of the block of cylinders
      Removal and installation of the pallet of a case of the engine
      The oil pump - installation details
      The oil level sensor switch - installation details, test data
   + 8-cylinder petrol engines (M119.970/981 and M119.971/981)
   + 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






The GRM drive - the general information, service of components

Camshafts can be turned without risk of collision of valves with pistons in case the bent shaft is given to situation 30 ° before VMT of the piston of the first cylinder.

The gas-distributing chain can be replaced without dismantling of the engine. By means of the listed below tools the new chain can be connected to old, is passed around asterisks and fullered.

At the wrong assembly there can be a collision of valves with the bottoms of pistons!

General information

Details of installation of elements of the GRM drive (the gas-distributing chain consists of 126 links)

1 — Adjusting tags for reduction of the engine in the provision of VMT of the end of a step of compression of the first cylinder
2 — Cores with a diameter of 4 mm for fixing of camshafts
3 — during installation of a chain track that ledges of the regulator of the camshaft [3] were in situation "delays".
4 — the Sprung nut of a natyazhitel

5 — the Pin
6 — Pruzhina
7 — the Plunger
8 — the Case of a natyazhitel


Performing procedures of removal and installation of elements of the GRM drive will require the following special tools:

  • Camshaft key (type 1) - No. 104589010100;
  • Camshaft key (type 2) - No. 119589000100;
  • Stripper of a nave/pulley of a bent shaft - No. 103589003300;
  • Stripper of an asterisk of a bent shaft - No. 615589013300;
  • The tool for blocking of a flywheel / a driving disk - No. 601589024000;
  • Bolts M6_90 for fixing of the instrument of blocking of a flywheel / a driving disk;
  • The tool for installation of links of a gas-distributing chain - No. 602589003900;
  • A set of shtampoderzhatel for installation of links of a gas-distributing chain - No. 112589096300;
  • Stripper of links of a gas-distributing chain (element 1) - No. 602589023300;
  • Stripper of links of a gas-distributing chain (element 2) - No. 602589056300;
  • The holder of a stripper of the viscous coupling (series 129/140) - No. 120589020100.
  • Pay attention to the next moments:
  • If the return is not stipulated especially, turn the engine only in the normal direction;
  • Observe the efforts of tightening of fixture stipulated by standards;
  • At the corresponding complete set do not forget to mark adjusting position of the CKP sensor before removal;
  • Do not turn a bent shaft for asterisks of camshafts, and also other asterisks of the GRM drive;
  • Do not turn cranked and camshafts at the removed gas-distributing chain.
  • Service of components of the GRM drive

    Details of installation of elements of the GRM drive (the gas-distributing chain consists of 126 links)


    1 — Adjusting tags for reduction of the engine in the provision of VMT of the end of a step of compression of the first cylinder
    2 — Cores with a diameter of 4 mm for fixing of camshafts
    3 — during installation of a chain track that ledges of the regulator of the camshaft [3] were in situation "delays".
    4 — the Sprung nut of a natyazhitel

    5 — the Pin
    6 — Pruzhina
    7 — the Plunger
    8 — the Case of a natyazhitel


     PERFORMANCE ORDER

    1. Disconnect a negative wire from the battery.
    2. For the purpose of simplification of a provorachivaniye of the engine turn out all spark plugs.
    3. Pass lock cores (2) with a diameter of 4 mm throughout camshafts.
    4. During installation of a chain track that ledges of the regulator of the camshaft (3) were in situation "delays".

    At the wrong assembly there can be a collision of valves with the bottoms of pistons!

    5. Before performance of repair of the engine weaken a nut of a natyazhitel on one turn.
    6. Remove assembly of a natyazhitel.
    7. Completely give the sprung nut (4) natyazhitel.
    8. Take a pin (5) and remove a spring (6).
    9. Push a plunger (7) in the case of a natyazhitel (8) in the direction specified by an arrow.
    10. Install the case of a natyazhitel (8) and tighten it with effort of 80 Nanometers.
    11. Fill a plunger (7), establish a spring (6) and a pin (5).
    12. Screw a nut of a natyazhitel (4) and tighten it with effort of 40 Nanometers.
    13. Tighten a new bolt of the regulator of the inlet camshaft with effort of 7 Nanometers (a bolt of type A with a separate washer) or 5 Nanometers + 90 ° (a bolt of type B with the built-in washer).

    Bolts of M7x13.3 of mm of the regulator inlet and asterisks final camshafts are disposable and are subject to replacement without fail!

    During performance of repair work the bolt of type A should be replaced with a disposable bolt of type B.

    14. Do not forget to grease the central bolt of a pulley of a bent shaft and its washer(s) before installation.





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