Mercedes W124

since 1985-1995 of release

Repair and car operation



W124 Mercedes
+ Governing bodies and control devices
+ MAINTENANCE
+ 2. Maintenance (diesel engines)
+ ENGINE
+ 4. Repair of 6-cylinder petrol SOHC engines
+ 5. Repair of 6-cylinder petrol DOHC engines
- 6. Repair of the diesel engine established in the car
   6.2. General information
   6.3. Repair operations on the engine established in the car
   6.4. Check of pressure of compression
   6.5. Top dead point (VMT) of the piston of the first cylinder
   6.6. Cover of a head of the block of cylinders
   6.7. Pulley cranked shaft / quencher of krutilny fluctuations and nave
   6.8. Cover of a driving chain
   6.9. Driving chain
   + 6.10. Mechanism of a tension of a driving chain, asterisk and uspokoitel of a chain
   + 6.11. Camshafts and pushers
   6.12. Head of the block of cylinders
   6.13. Oil pallet
   6.14. Oil pump and driving chain
   6.15. Drive flywheel / plate
   6.16. Replacement of sealing rings of a cranked shaft
+ 7. Major maintenance of engines
+ COOLING SYSTEM
+ FUEL SYSTEM
+ 10. System of injection of BOSCH CIS-E fuel (KE-JETRONIC)
+ 11. System of injection of BOSCH HFM fuel
+ 12. Fuel system of diesel engines
+ 13. Fuel system of diesel engines
+ SYSTEMS OF START, IGNITION
+ 15. System of ignition of 4-cylinder petrol engines
+ 16. System of ignition of four-cylinder petrol engines
+ PRESTARTING HEATING
+ TRANSMISSION
+ 19. Mechanical transmission
+ 20. Automatic transmission
+ POWER SHAFTS
+ BRAKE SYSTEM
+ SUSPENSION BRACKET
+ BODY
+ ELECTRIC EQUIPMENT
+ CHECK OF MALFUNCTIONS






6. Repair of the diesel engine established in the car

6.1. Technical characteristics

Engine code:
– 4-cylinder engine of 2,0 l
601,912
– 5-cylinder engine of 2,5 l:
   • without a turbo-supercharging
602,912
   • with a turbo-supercharging
602,962
– 6-cylinder engine of 3,0 l:
   • without a turbo-supercharging
603,912
   • with a turbo-supercharging
603,960, 603,962 or 603,963
Working volume:
– engine of 2,0 l
1997 cm3
– engine of 2,5 l
2497 cm3
– engine of 3,0 l
2996 cm3
Diameter of cylinders
87,0 mm
Piston stroke
84,0 mm
Direction of rotation of a cranked shaft of the engine
Clockwise, if to look from a forward part of the car
Cylinder No. 1 arrangement
From a driving chain
Operating procedure of cylinders:
– engine of 2,0 l
1–3–4–2
– engine of 2,5 l
1–2–4–5–3
– engine of 3,0 l
1–5–3–6–2–4
Pressure of compression:
– the minimum admissible
18,0 bar
– the maximum difference between two any cylinders
3,0 bar
Extent of compression
22,0: 1

Camshaft

Axial люфт:
– the nominal
0,030-0,100 mm
– maximum permissible
0,150 mm
Working gap of bearings of a camshaft:
– the nominal
0,050-0,091 mm
– maximum permissible
0,150 mm
The maximum gap between a cam of a camshaft and a valve pusher
0,40 mm

The most admissible length of bolts of fastening of a head of the block of cylinders


Bolt М10 x 80
83,6 mm
Bolts М10 x 102
105,6 mm
Bolts М10 x 115
118,6 mm

Greasing system

The minimum pressure of oil created by the oil pump:
– on idling turns
0,3 bar
– at 3 000 rpm
3,0 bar

Bolts of fastening of a flywheel / plate of a drive

Minimum diameter
8,0 mm
Maximum length
22,5 mm

Tightening moments

Bolts of fastening of a cover of a head of the block of cylinders
10 Nanometers
Bolts of fastening of a pulley of a cranked shaft / quencher of krutilny fluctuations to a nave
25 Nanometers
Bolt of fastening of a nave to a cranked shaft:
– a bolt with tarelchaty washers
320 Nanometers
– a bolt with a conic washer:
   • stage 1
200 Nanometers
   • stage 2
To tighten on a corner 90 °
Bolts of fastening of a cover of a driving chain:
– bolts М6
10 Nanometers
– bolts М8
25 Nanometers
Bolts of fastening of a pulley of the fan of a radiator:
– a bolt with a six-sided head
10 Nanometers
– face bolt
14 Nanometers
Bolt of fastening of the mechanism of a tension of an auxiliary driving belt
10 Nanometers
Sharnirny finger of the mechanism of a tension of an auxiliary driving belt
100 Nanometers
Bolt of fastening of an intermediate pulley of an auxiliary driving belt
25 Nanometers
Bolts of fastening of a rack of the shock-absorber of the mechanism of a tension of an auxiliary driving belt:
– top bolt
25 Nanometers
– bottom bolt
20 Nanometers
Bolts of fastening of the pump of system of a being self-leveled back suspension bracket:
– a bolt with a six-sided head
25 Nanometers
– the combined bolt:
   • stage 1
25 Nanometers
   • stage 2
To tighten on a corner 90 °
Bolt of fastening of an asterisk of a camshaft:
– bolt М10
65 Nanometers
– bolt М11:
   • stage 1
25 Nanometers
   • stage 2
To tighten on a corner 90 °
Stopper fastening to the case of the mechanism of a tension of a driving chain
40 Nanometers
Fastening of the case of the mechanism of a tension of a driving chain to the block of cylinders
80 Nanometers
Bolts of fastening of covers of bearings of a camshaft
25 Nanometers
Bolts of fastening of a cover of a driving chain to a head of the block of cylinders
25 Nanometers
Bolts of fastening of the fuel filter
25 Nanometers
Bolts of fastening of a head of the block of cylinders:
– stage 1
15 Nanometers
– stage 2
35 Nanometers
– stage 3
To tighten on a corner 90 °
– stage 4
To sustain a pause 10 minutes
– stage 5
To tighten on a corner 90 °
Bolts of fastening of a transmission to the engine:
– mechanical transmission:
   • bolts М10 x 40
55 Nanometers
   • bolts М10 x 90
45 Nanometers
– automatic transmission:
   • bolts М10
55 Nanometers
   • bolts М12
65 Nanometers
Bolts of fastening of an additional part of the oil pallet
10 Nanometers
Bolts of fastening of the oil pallet:
– bolts М6
10 Nanometers
– bolts М8
25 Nanometers
Masloslivny stopper:
– bolts М12
30 Nanometers
– bolts М14
25 Nanometers
Stopper of a safety valve of pressure of oil
50 Nanometers
Bolt of fastening of an asterisk of the oil pump
32 Nanometers
Bolts of fastening of the oil pump
25 Nanometers
Bolts of fastening of a masloulavlivayushchy plate
25 Nanometers
Bolts of fastening of a flywheel / plate of a drive:
– stage 1:
   • standard flywheel
30 Nanometers
   • a flywheel with the doubled weight
40 Nanometers
– stage 2
To tighten on a corner 90-100 °
Bolts of fastening of a back cover of a cranked shaft
10 Nanometers
Bolts of fastening of an arm of a support of the power unit
55 Nanometers
Bolts of fastening of a support of the power unit to a cross-piece
40 Nanometers
Bolts of fastening of an arm of a support of the power unit to the engine
25 Nanometers
Nuts of fastening of covers of shatunny bearings:
– stage 1:
   • models till November, 1990
30 Nanometers
   • models since December, 1990
40 Nanometers
– stage 2
To tighten on a corner 90-100 °
Bolts of fastening of covers of radical bearings:
– bolts М11:
   • stage 1
55 Nanometers
   • stage 2
To tighten on a corner 90-100 °
– bolts М12
90 Nanometers
Stopper plum of cooling liquid from the block of cylinders of the engine
30 Nanometers