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






Service of the block of cylinders

Points of measurement of the sizes of cylinders

A — the Longitudinal direction
B — the Cross direction
and — the Top point of the course of the top compression ring

b — the Lower dead point
with — the Lower point of the course of an oil scraper ring
1, 2, 3 — Points of measurements


Processing of the interfaced surfaces of the block of a tsilindrov and a point of measurement

The sizes of cylinders and pistons are specified in Specifications. Pay attention also to the following parameters:
Admissible wear in the prodrlny and cross directions 0.10 mm
Admissible ovality New 0.007 mm
Admissible 0.05 mm
Admissible roughness of RZ after a honingovaniye 0.003 — 0.006 mm
Admissible sinuosity of Wt 50% of a roughness
Honingovaniye corner 50 ± 10

The sizes for processing of the interfaced surfaces of the block of cylinders are specified in Specifications.