Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
- Engine
   Compression check in engine cylinders
   Engine check by means of the vacuum gage
   Belt of a 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)
   - 12-cylinder petrol engines (M120.980/982)
      Air purifier - installation details
      Covers of heads of the block of cylinders
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
      The valve of a retsirkulyatsiya of the fulfilled gases - installation details
      Pump of supply of air
      Removal and installation of the top forward covers
      Heads of the block of cylinders
      Removal and installation of a cover of a chain of a drive of GRM
      Replacement of a chain of a drive of GRM
      GRM drive - the general information, service of components
      Natyazhitel of a chain of a drive of GRM
      Camshaft regulator
      Removal and installation of camshafts
      Check of phases of a gazoraspredeleniye
      Check and adjustment of provision of camshafts
      Replacement of directing plugs of valves
      Measurement of diameters of cylinders
      Removal and installation of pistons
      Check of rods
      Removal and installation of a cranked shaft
      Removal and installation of the pallet of a case of the engine
      The sensor switch of level of oil - installation details
      The oil pump - a design and installation details
   + 6-cylinder diesel engines (OM603.971)
   + 6-cylinder diesel engines (OM606.961)
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Removal and installation of pistons



1. Unscrew shatunny covers and remove rods together with pistons. Pay attention that rods and shatunny covers of one cylinder have identical designation.
2. Check shatunny bolts.
3. Remove a lock ring by means of a screw-driver and выпрессуйте a piston finger.
4. Check gaps in locks of piston rings and between rings and piston flutes.



1. Grease a piston finger and the rod plug.
2. Establish the piston so that figures (5) and (6) were directed towards movement and the pas label a rod and a cover (9) was turned outside of the engine.
3. Press a piston finger by hand.
4. Insert a lock ring into a groove. Grease openings of cylinders, shatunny necks, loose leaves and pistons with impellent oil.
5. Establish an opravka (1) piston rings and fill the piston in the cylinder on an arrow or figure on the piston in the movement direction.
6. Establish shatunny covers.
7. Turn a cranked shaft and check ease of rotation.