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)
   + 12-cylinder petrol engines (M120.980/982)
   - 6-cylinder diesel engines (OM603.971)
      The air cleaner - installation details
      Replacement of a belt of the drive of the generator
      Removal and installation of a natyazhitel of a belt of the drive of the generator
      Final collector - installation details
      GRM drive chain cover
      Camshaft
      Removal and installation of a head of the block of cylinders
      Verification of the control provision of the camshaft
      Replacement of a chain of the GRM drive
      The GRM drive - the general information, service of components
      Natyazhitel of a GRM drive chain - an installation detail
      Removal and installation of pistons
      Check of a state and replacement of rods
      Measurement of diameters of cylinders
      Removal and installation of sleeves of cylinders
      Check of a condition of a bent shaft
      Removal and installation of an asterisk of a bent shaft
      Removal and installation of the pallet of a case of the engine
      The oil level sensor switch - installation details
      Replacement of a chain of the drive of the oil pump
      Removal and installation of the oil pump
      Removal and installation of the case of an oil filter
   + 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

79c5991e

Check of a state and replacement of rods

Check of rods

1 — the Rod
2 — the Conrod cover
3 — the Plug
4 — the Directing grooves
5 — the Conrod bolt
6 — Balancing small weights
7 — the Identification field (models with a turbo-supercharging)
8 — Grooves for installation of inserts
9 — the Oil channel (models with a turbo-supercharging)

10 — the Oil channel (models without turbo-supercharging)
11 — the Identification field (models without turbo-supercharging)
b — Width of the top head of a rod
B — Width of the lower head of a rod
d — the Internal diameter of the plug of the top head of a rod
d1 — the Outer diameter of the plug of the top head of a rod
D1 — Diameter of an opening of the lower head of a rod
L — distance between centers openings of heads of a rod


 PERFORMANCE ORDER

1. Remove pistons (see the Section Removal and installation of pistons).
2. Check rods for decolouration, a distortion of openings and dredging. At detection of these damages rods need to be replaced.
3. Check bolts of fastening of conrod covers.
4. Measure diameter of an opening of a rod. If diameter is more than maximum admissible, grind off a contact surface of a cover no more than on 0:02 mm.
5. Check the internal diameter of the plug of a rod.
6. Installation is carried out as it should be, the return to removal. The sizes of rods are specified in Specifications.