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
      4.8.2. Bottom cover of a driving chain
   4.9. Driving chain
   + 4.10. Mechanism of a tension of a driving chain, asterisk and uspokoitel of a chain
   + 4.11. 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






4.8. Covers of a driving chain

4.8.1. Top cover of a driving chain

GENERAL INFORMATION

Prevention

At installation of a cover of a driving chain it is necessary to use the hermetic, new sealing laying and a new sealing ring of round section of a pipe of cooling liquid. It is desirable to make also replacement of a forward sealing ring of a camshaft.


Removal

Unscrewing of the central bolt (1) for removal of a drive of a rotor of the distributor (2)

PERFORMANCE ORDER
1. Uncover heads of the block of cylinders.
2. Press fixing brackets and remove a casing of the distributor of ignition. From a cover of the distributor of ignition remove the central high-voltage wire, unscrew three screws, uncover the distributor and move it aside, without disconnecting from it other high-voltage wires.
3. Partially merge cooling liquid from cooling system.
4. Disconnect a hose of supply of cooling liquid to a heater from the forward party of a head of the block of cylinders.
5. Unscrew bolts and remove a pipe of supply of cooling liquid from the water pump.
6. Unscrew three screws and remove a distributor rotor.
7. Unscrew the central bolt and remove a drive of a rotor of the distributor (see fig. Unscrewing of the central bolt for removal of a drive of a rotor of the distributor). Remove a plastic casing from a lobby and the top part of a cover of a driving chain.
8. Unscrew bolts of fastening of the top cover of a driving chain and uncover. The top cover of a driving chain is established on hermetic on I direct shchy pins.
9. Remove sealing laying from a flute in the top part of the bottom cover of a driving chain.

Installation

Places of drawing of hermetic (arrow) before installation of new laying (1) on the bottom cover of a driving chain

PERFORMANCE ORDER
1. Clear interfaced surfaces of a cover of a driving chain and a head of the block of cylinders of the hermetic remains.
2. Replace a sealing ring of a camshaft in the top cover of a driving chain.
3. Using a screw-driver edge, take an old sealing ring from the top cover of a driving chain.
4. Clear a nest for installation of a sealing ring. Establish a new sealing ring in a nest so that the face surface of a sealing ring was flush with a surface of a cover of a driving chain.
5. For protection of working edges of a new sealing ring against damage at its installation wind with a sticky tape a camshaft end face.
6. Put a hermetic layer in a junction of the top part of the bottom cover of a driving chain with a head of the block of cylinders (see fig. Places of drawing of hermetic before installation of new laying on the bottom cover of a driving chain). Establish new laying in a groove in the top part of the bottom cover of a driving chain.
7. Apply a thin film hermetic on interfaced surfaces of a head of the block of cylinders and the top cover of a driving chain.
8. Grease working edges of a sealing ring of a camshaft with pure engine oil and establish the top cover of a driving chain. Fix a cover bolts, having tightened them the demanded moment.
9. Remove a sticky tape from a camshaft end face.
10. At existence establish forward and top casings on a cover of a driving chain. Establish a drive of a rotor of the distributor. Thus the ledge on the number distributor to a shaft should enter into a flute in the drive plug. Screw in the central bolt of fastening of a drive of a rotor of the distributor and tighten it the demanded moment.
11. Establish a rotor of the distributor and fix it screws.
12. Establish a new sealing ring of round section on a pipe of supply of cooling liquid, establish a pipe on the water pump and fix bolts.
13. Dress on a pipe a hose of cooling liquid.
14. Establish a cover of the distributor of ignition and connect to it the central high-voltage wire.
15. Establish a cover of a head of the block of cylinders.
16. Fill in cooling liquid in cooling system.