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
   4.2. General information
   4.3. Repair operations on the engine established in the car
   4.4. Check of pressure of compression
   4.5. Top dead point (VMT) of the piston of the first cylinder
   4.6. Cover of a head of the block of cylinders
   4.7. Pulley cranked shaft / quencher of krutilny fluctuations and nave
   + 4.8. Covers of a driving chain
   4.9. Driving chain
   - 4.10. Mechanism of a tension of a driving chain, asterisk and uspokoitel of a chain
      4.10.2. Asterisks
      4.10.3. Uspokoiteli
   + 4.11. Drive of valves, pushers and camshaft
   4.12. Head of the block of cylinders
   4.13. Oil pallet
   4.14. Oil pump
   4.15. Replacement of a chain of a drive of the oil pump
   4.16. Drive flywheel / plate
   4.17. Replacement of sealing rings
   4.18. Bearing replacement in an end face of a cranked shaft
   4.19. Check and replacement of a support of the power unit
+ 5. Repair of 6-cylinder petrol DOHC engines
+ 6. Repair of the diesel engine established in the car
+ 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






4.10.2. Asterisks

CAMSHAFT ASTERISK

Removal

PERFORMANCE ORDER
1. Remove the top cover of a driving chain.
2. Establish the piston of the first cylinder in the top dead point and check that all adjusting labels are combined with indexes.
3. Remove the mechanism of a tension of a driving chain.
4. Using paint, put combination labels on an asterisk of a camshaft and a link of a driving chain, both an asterisk of a camshaft and a camshaft.
5. Unscrew three bolts, remove an asterisk from a camshaft and take from a driving chain. Constantly support branches of a driving chain in the tense situation in order that the driving chain did not act in film from an asterisk of a cranked shaft.
6. Take from a camshaft groove a segment shponka.

Check

PERFORMANCE ORDER
1. Check a condition of teeths on an asterisk. Teeths on an asterisk have a symmetric form and in case of development on the one hand teeths it is necessary to replace an asterisk.

Installation


Prevention

The asterisk of a camshaft has some updatings therefore at replacement of an asterisk it is necessary to consult with representatives of the Mercedes-Benz company.


PERFORMANCE ORDER
1. Establish a segment shponka in a groove on distributive to a shaft
2. Check that all adjusting labels are combined with indexes. At installation of a new asterisk of a camshaft put on it combination labels on the same places, as on an old asterisk.
3. Dress a chain on an asterisk, having combined earlier put labels.
4. Establish an asterisk on a camshaft according to earlier put labels and fix it bolts.
5. Establish the mechanism of a tension of a driving chain.
6. Turn a cranked shaft of the engine on 2 complete revolutions clockwise and check that all adjusting labels were combined with indexes.
7. Establish the top cover of a driving chain.

ASTERISK OF THE CRANKED SHAFT

Removal


Prevention

At removal of an asterisk of a cranked shaft it is necessary to cut one link of a chain of a drive of the oil pump. Therefore or prepare a new link of a chain or a new chain of the oil pump. For removal of an asterisk of a cranked shaft it is necessary to use a stripper.

At removal of a chain it is necessary to use a nazhdachny circle or вулканит, for cutting of coming-out hats of one of chain links.


Remove from a sharnirny finger a boot (1) mechanism of a tension of a driving chain of the oil pump, the plug (2) and a spring (3)

PERFORMANCE ORDER
1. Remove a boot of the mechanism of a tension of a driving chain.
2. Close the oil pallet pure rags.
3. Remove from a sharnirny finger a boot of the mechanism of a tension of a driving chain of the oil pump. Remove from a sharnirny finger the plug and a spring. Thus note a spring arrangement for the correct repeated installation it on a place (see drawing).
4. Using a nazhdachny stone or вулканит, сошлифуйте the rasklepanny ends of a connecting link of a driving chain of the oil pump on the top part of an asterisk of a cranked shaft.
5. Supporting a chain, remove fixing plate and beat out from a chain a connecting link of a chain.
6. Being careful, that shaving did not get to the oil pallet, remove the rags closing the oil pallet.
7. Using a soft wire, adhere the ends of a chain of a drive of the oil pump in order that she did not act in film from an asterisk of the oil pump.
8. Put combination labels on a driving chain and a camshaft asterisk, then remove a driving chain from an asterisk.
9. Remove a driving chain from an asterisk of a cranked shaft. Note orientation of an asterisk and, using a stripper, remove an asterisk of a cranked shaft.
10. Remove a segment shponka from a groove of a cranked shaft.

Check

PERFORMANCE ORDER
1. Check a condition of teeths on an asterisk. Teeths on an asterisk have a symmetric form and in case of development on the one hand teeths it is necessary to replace an asterisk.

Installation
PERFORMANCE ORDER
1. Establish a segment shponka in a groove of a cranked shaft.
2. At installation of a new asterisk transfer labels from an old asterisk on the same places on a new asterisk.
3. Heat up an asterisk of a cranked shaft to temperature 50 ° With, combine a groove in an asterisk with a segment shponka and establish an asterisk on a cranked shaft.
4. Establish a driving chain on a camshaft asterisk according to earlier put labels.
5. Establish a driving chain on an asterisk of a cranked shaft, combining labels on an asterisk and a chain.
6. Arrange the ends of a chain of a drive of the oil pump on an asterisk of a cranked shaft, then connect the chain ends a connecting link. Establish fixing plate on a connecting link and расклепайте a connecting link. Check, that after a rasklepyvaniye there were no metal agnails.
7. Establish on a sharnirny finger the plug, a spring and a boot of the mechanism of a tension.
8. Establish a boot of the mechanism of a tension of a driving chain.