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


Check of phases of gas distribution

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

Check of phases of gas distribution

01 — the Digital device
02 — the Clamp
03 — the Probe
04 — the Carving plug


1. Check codes of camshafts. The code of the camshaft is beaten out on a neck of the 3rd bearing and on a camshaft flange.
2. Establish a cam of the cylinder 1 or 6 by a working ledge up so that he did not press the hydrocompensator.
3. Establish a clamp (02) by the carving plug (04) on a contact surface of a head of the block of cylinders of the checked camshaft.
4. Install the digital device (01) with the probe (03) (80 mm) on a clamp (02) on the left side of the checked camshaft. Install the probe with a preliminary tightness of 3 mm and at an angle 90 ° to the hydrocompensator.
5. Rotate a bent shaft by means of a key in the direction of rotation until the digital device does not show raising of the valve on 2 mm. In this situation check a phase of opening of the checked valve on a pulley of a bent shaft and compare to data in the table given below.