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
- 7. Major maintenance of engines
   7.2. General information
   7.3. Recommendations about engine removal
   7.4. Removal and installation of 4-cylinder petrol engines
   7.5. Removal and installation of 6-cylinder petrol engines
   7.6. Removal and installation of diesel engines
   7.7. Sequence of dismantling of the engine
   + 7.8. Analysis of a head of the block of cylinders
   + 7.9. Assembly of a head of the block of cylinders
   7.10. Removal of pistons with rods
   7.11. Removal of a cranked shaft
   7.12. Block of cylinders of the engine
   7.13. Pistons and rods
   7.14. Cranked shaft
   7.15. Survey of radical and shatunny bearings
   7.16. Engine balance of assembly at major maintenance
   7.17. Installation of piston rings
   7.18. Installation of a cranked shaft
   7.19. Check of a working gap of radical bearings
   7.20. Installation of a cranked shaft
   + 7.21. Installation of pistons with rods
   7.22. Engine start after major maintenance
+ 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






7.18. Installation of a cranked shaft

Choice of radical loose leaves of a cranked shaft

FOUR-CYLINDER PETROL ENGINES

For determination of the demanded thickness of new radical loose leaves it is necessary to measure internal diameter of the radical bearing, diameter of a radical neck of a cranked shaft and to consider a working gap of the bearing. The demanded thickness of the bearing can be calculated as follows.

Example

Diameter of the bearing of 62,51 mm
Diameter of a neck of the crankshaft of 57,95 mm
4,56 mm
Working gap of the bearing of-0,04 mm
4,52 mm ±2
2,26 mm

If it is necessary to use the top and bottom radical loose leaves of various thickness, it is necessary to establish thicker loose leaf in a cover of the radical bearing.

As spare parts loose leaves of radical bearings of the next thickness are delivered.

Loose leaves
Thickness of the loose leaf
The nominal
– 2,25 mm
Repair size 1
– 2,37 mm
Repair size 2
– 2,50 mm
Repair size 3
– 2,62 mm
Repair size 4
– 2,75 mm

SIX-CYLINDER PETROL SOHC ENGINES

The thickness of loose leaves of radical bearings is defined in the same way, as well as for 4-cylinder petrol engines. For determination of the demanded size of loose leaves it is necessary to consult at the dealer of Mercedes-Benz.

SIX-CYLINDER PETROL DOHC ENGINES

For determination of the demanded thickness of new radical loose leaves it is necessary to measure internal diameter of the radical bearing, diameter of a radical neck of a cranked shaft and to consider a working gap of the bearing. The demanded thickness of the bearing can be calculated as follows.

Example

Diameter of the bearing of 62,51 mm
Diameter of a neck of the crankshaft of 57,95 mm
4,56 mm
Working gap of the bearing of-0,04 mm
4,52 mm ±2
2,26 mm

If it is necessary to use the top and bottom radical loose leaves of various thickness, it is necessary to establish thicker loose leaf in a cover of the radical bearing.

The demanded thickness of the loose leaf of the radical bearing determine by the table after consultation of the dealer of Mercedes-Benz.

DIESEL ENGINES

Loose leaves of radical bearings have color marking. Loose leaves of three various thickness with color marking of dark blue, yellow and red color are used.

The cranked shaft of the engine also has the color marking put on cheeks of a cranked shaft or on противове of Sakha behind necks of a cranked shaft. On the block of cylinders also there are labels in the form of points.

The thickness of the loose leaf of the radical bearing gets out on crossing of the vertical and horizontal line.

Color of marking of a cranked shaft
Labels on the block of cylinders
1 point
2 points
3 points
The dark blue
The dark blue
The yellow
The yellow
The yellow
The dark blue
The yellow
The red
The red
The yellow
The yellow
The red

Also it is possible to determine thickness of loose leaves of radical bearings of a cranked shaft by a method used for 4-cylinder petrol engines.

The table for a choice of loose leaves of radical bearings for 6-cylinder petrol DOHC engines

Size
Color
Diameter
Thickness of the top loose leaf
Thickness of the bottom loose leaf
The nominal
The blue
58,00
2,255-2,260
2,255-2,260
The nominal
The yellow
58,00
2,260-2,265
2,260-2,265
The nominal
The red
58,00
2,265-2,270
2,265-2,270
The nominal increased
It is white/is blue.
58,00
2,263-2,268
The nominal increased
It is white / the yellow
58,00
2,268-2,273
The nominal increased
It is white / the red
58,00
2,273-2,278
Repair 1
The blue
57,75
2,375-2,380
2,375-2,380
Repair 1
The yellow
57,75
2,380-2,385
2,380-2,385
Repair 2
The blue
57,50
2,500-2,505
2,500-2,505
Repair 2
The yellow
57,50
2,505-2,510
2,505-2,510
Repair 3
The blue
57,25
2,625-2,630
2,625-2,630
Repair 3
The yellow
57,25
2,630-2,635
2,630-2,635
Repair 4
The blue
57,00
2,750-2,755
2,750-2,755
Repair 4
The yellow
57,00
2,755-2,760
2,755-2,760