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
   5.2. General information
   5.3. Repair operations on the engine established in the car
   5.4. Check of pressure of compression
   5.5. Top dead point (VMT) of the piston of the first cylinder
   5.6. Cover of a head of the block of cylinders
   5.7. Pulley cranked shaft / quencher of krutilny fluctuations and nave
   - 5.8. Covers of a driving chain
      5.8.2. The top cover of a driving chain (model with system of injection of HFM fuel)
      5.8.3. Bottom cover of a driving chain
   5.9. Check and replacement of a driving chain
   + 5.10. Mechanism of a tension of a driving chain, asterisk and uspokoitel of a chain
   5.11. Boot of the mechanism of a tension
   5.12. Mechanism of adjustment of a camshaft
   5.13. Camshafts and pushers
   5.14. Check and adjustment of provision of camshafts
   5.15. Head of the block of cylinders
   5.16. Oil pallet
   5.17. Oil pump chain and drive
   5.18. Drive flywheel / plate
   5.19. Replacement of sealing rings
   5.20. Bearing replacement in an end face of a cranked shaft
   5.21. Check and replacement of a support of the power unit
   5.22. Oil radiator
+ 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






5.8.3. Bottom cover of a driving chain

GENERAL INFORMATION

Prevention

At installation of the bottom cover it is necessary to use hermetic and a new sealing ring of round section for a pipe of cooling liquid. It is also desirable to replace a forward sealing ring of a cranked shaft.


Removal

Unscrewing of bolts and arm from a cover of a driving chain
After weakening of the central bolt (And) the mechanism of a tension of an auxiliary driving belt unscrew three bolts (In) and turn an arm (1) from a cover of a driving chain.

Elements of fastening of an arm of the fan of a radiator and sensor of an angle of rotation of a cranked shaft
1–arm of the fan of a radiator;
2–bolts;
3–sensor of an angle of rotation of a cranked shaft;
4–nut

Arrangement of bolts of fastening of the oil pallet to the bottom cover of a driving chain

Removal of the bottom cover of a driving chain

PERFORMANCE ORDER
1. Remove a weight wire from the accumulator.
2. Open a cowl and establish it in vertical situation.
3. Remove an engine mudguard.
4. Remove the air filter.
5. Remove a krylchatka of the fan and the hydraulic coupling.
6. Unscrew a bolt, fixing an air inlet tube to the forward panel of a body.
7. Remove an auxiliary driving belt.
8. Unscrew bolts and remove pulleys of an auxiliary driving belt.
9. Remove a pulley cranked a shaft / quencher of krutilny fluctuations and a nave.
10. Remove the top cover of a driving chain.
11. Weaken the central bolt of fastening of the mechanism of a tension of an auxiliary driving belt, then unscrew three bolts and turn an arm aside from a cover of a driving chain (see fig. Unscrewing of bolts and an arm from a cover of a driving chain).
12. Unscrew two bolts of fastening of the pump of the amplifier of a steering to an arm and turn the pump from the engine.
13. At existence remove the air pump and move it aside, without disconnecting from it hoses.
14. Unscrew bolts and remove an arm of the fan of a radiator (see fig. Elements of fastening of an arm of the fan of a radiator and sensor of an angle of rotation of a cranked shaft).
15. Unscrew a nut and remove the sensor of an angle of rotation of a cranked shaft from an arm on a cover of a driving chain. Release sensor electroconducting from brackets of fastening and move the sensor aside.
16. Disconnect electric wires from the generator.
17. Unscrew four bolts of fastening of an arm of the generator to the engine and remove the generator together with an arm.
18. Working under the car, unscrew bolts of fastening of the oil pallet to the bottom cover of a driving chain (see fig. An arrangement of bolts of fastening of the oil pallet to the bottom cover of a driving chain). Note an arrangement of bolts as they have the different sizes.
19. Unscrew the remained bolts of fastening of the bottom cover of a driving chain, noting their arrangement as bolts of the various sizes are applied.
20. Remove the bottom cover of a driving chain (see fig. Removal of the bottom cover of a driving chain).
Prevention

At removal of the bottom cover of a driving chain be careful not to damage laying of the oil pallet.



Installation

Hermetic drawing on interfaced surfaces of the block of cylinders and the bottom cover of a driving chain
After hermetic drawing on interfaced surfaces of the block of cylinders and the bottom cover of a driving chain (And) check, that hermetic did not get to canals of the chamber of supply of oil to the mechanism of a tension of a driving chain (In).

Replacement of a sealing ring in an opening for the bottom bolt of fastening of an arm of the fan of a radiator

PERFORMANCE ORDER
1. Clear interfaced surfaces of the bottom cover of a driving chain, the block of cylinders of the engine and the top cover of a driving chain.
2. Check a condition of laying of the oil pallet. If laying is damaged, replace it.
3. Clear a nest for a sealing ring.
4. Establish a new sealing ring in a cover nest.
5. Not to damage working edges of a sealing ring of a cranked shaft at installation of the bottom cover of a driving chain, wind with a sticky tape a forward end face of a cranked shaft.
6. Apply a thin film hermetic on interfaced surfaces of the block of cylinders and a cover of a driving chain. Be careful, that hermetic did not get to the chamber of supply of oil to the mechanism of a tension of a driving chain in a cover or to lubricant canals (see fig. Hermetic drawing on interfaced surfaces of the block of cylinders and the bottom cover of a driving chain).
7. Grease working edges of a sealing ring of a cranked shaft with pure engine oil and establish the bottom cover of a driving chain on the block of cylinders.
8. Screw in the bolts, fixing the oil pallet to a cover of a driving chain and, tighten them the demanded moment.
9. Screw in the remained bolts of fastening of a cover of a driving chain and tighten them the demanded moment.
10. Replace the sealing ring established in an opening for the bottom bolt of fastening of an arm of the fan of a radiator in a cover of a driving chain (see fig. Replacement of a sealing ring in an opening for the bottom bolt of fastening of an arm of the fan of a radiator).
11. Remove a sticky tape from a forward end face of a cranked shaft.
12. Establish the generator and connect to it wires.
13. Establish the sensor of an angle of rotation of a cranked shaft on an arm on a cover of a driving chain and fix it a nut.
Prevention

At installation of a new bottom cover of a driving chain it is necessary to check and, if necessary to adjust position of the sensor of an angle of rotation of a cranked shaft.


14. Establish an arm of the fan of a radiator and fix it bolts.
15. At existence establish the air pump.
16. Establish the pump of the amplifier of a steering on a place and fix bolts.
17. Put hermetic from two parties on openings under a bolt of fastening of a cover of a driving chain in an arm of the mechanism of a tension of an auxiliary driving belt.
18. Turn an arm of the mechanism of a tension of an auxiliary driving belt on a place and fix bolts.
19. Establish the top cover of a driving chain.
20. Establish a pulley cranked a shaft / quencher of krutilny fluctuations and a nave.
21. Establish and fix bolts pulleys of an auxiliary driving belt.
22. Establish an auxiliary driving belt.
23. Establish and fix a bolt an air inlet tube.
24. Establish the hydraulic coupling and a krylchatka of the fan of a radiator.
25. Establish the air filter.
26. Establish the bottom mudguard of the engine.
27. Fill in in cooling system cooling liquid.
28. Check level and, if necessary, add engine oil in the engine.