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






4.8.2. Bottom cover of a driving chain

Removal

Arrangement of a pipe of supply of cooling liquid and bolt of fastening of an eye for engine lifting
1–bolt of fastening of a pipe;
2–a pipe for supply of cooling liquid;
3–nut;
4–bolt

Elements of fastening of an arm of the pump of the amplifier of a steering
1–arm;
2–central bolt;
3–bolts of fastening of an arm

Arrangement of bolts (1) fastening of an arm (2) pulleys of the fan of a radiator

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

Arrangement of other bolts of fastening 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. At existence remove an engine mudguard.
4. Remove the air filter.
5. Remove a radiator and a krylchatka of the fan.
6. Unscrew a bolt, fixing an airintaking pipe to the panel of a body and, remove a pipe.
7. Remove an auxiliary driving belt.
8. Unscrew bolts and remove pulleys of an auxiliary driving belt.
9. Remove a pulley of a cranked shaft / quencher of krutilny fluctuations and a nave.
10. Unscrew bolts and remove a pipe of supply of the cooling liquid leaving from the forward party of a head of the block of cylinders from the water pump. Remove from a pipe a sealing ring of round section and move a pipe aside.
11. Unscrew a nut and take a bolt of fastening of a forward eye for lifting of the engine, the head of the block of cylinders located on the forward party (see fig. An arrangement of a pipe of supply of cooling liquid and a bolt of fastening of an eye for engine lifting).
12. On models with a being self-leveled back suspension bracket weaken a collar and remove a hose from a pipe on the left forward side of a head of the block of cylinders. Close a hose and a pipe the corresponding jams.
13. Remove the top cover of a driving chain.
14. Weaken the central bolt of fastening of an arm of the pump of the amplifier of a steering, then unscrew three bolts of fastening of an arm (see fig. Elements of fastening of an arm of the pump of the amplifier of a steering).
15. Turn an arm, releasing the bottom cover of a driving chain.
16. Unscrew two bolts of fastening of the pump of the amplifier of a steering to an arm and move the pump aside.
17. Unscrew bolts and remove an arm of a pulley of the fan of a radiator from a cover of a driving chain (see fig. Arrangement of bolts of fastening of an arm of a pulley of the fan of a radiator).
18. Unscrew a nut and remove from an arm the sensor of an angle of rotation of a cranked shaft located on the forward party of a cover of a driving chain. Take wires of the sensor and brackets of fastening and move the sensor aside.
19. Disconnect electric wires from the generator.
20. Unscrew four bolts of fastening of an arm of the generator to the engine and remove the generator together with an arm.
21. Remove the mechanism of a tension of a driving chain.
22. Working under the car, unscrew the bolts, fixing 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 the provision of bolts as they have the various sizes. On models with system of a being self-leveled back suspension bracket move a system hose aside.
23. Unscrew the remained bolts of fastening of the bottom cover of a driving chain. Thus note their arrangement as bolts have the various sizes (see fig. Arrangement of other bolts of fastening of the bottom cover of a driving chain).
24. Being careful, remove the bottom cover of a driving chain from directing pins.

Installation

PERFORMANCE ORDER
1. Clear interfaced surfaces of the block of cylinders and the bottom and top covers of a driving chain.
2. Check a condition of laying of the oil pallet and at its damage replace laying of the oil pallet.
3. If necessary replace the forward sealing ring of a cranked shaft established in the bottom cover of a driving chain.
4. Using a screw-driver edge, take an old sealing ring from a cover of a driving chain.
5. Clear a nest for a sealing ring.
6. Using a tubular opravka, establish a new sealing ring in a cover of a driving chain.
7. For protection of working edges of a sealing ring of a cranked shaft at installation of a cover of a driving chain wrap up a sticky tape the forward end of a cranked shaft.
8. Replace laying in a cover of a driving chain in an opening for the bottom bolt of fastening of an arm of the fan of a radiator.
9. Apply a thin film hermetic on interfaced surfaces of the block of cylinders and the bottom cover of a driving chain.
10. Grease working edges of a sealing ring of a cranked shaft with pure engine oil and, being careful, establish the bottom cover of a driving chain on the block of cylinders.
11. Establish bolts of fastening of a cover of the driving chain, shown in drawing the Arrangement of other bolts of fastening of the bottom cover of a driving chain, and tighten them the demanded moment.
12. Remove a sticky tape from a forward end face of a cranked shaft.
13. Screw in bolts of fastening of the oil pallet to the bottom cover of a driving chain and tighten them the demanded moment.
14. Establish the mechanism of a tension of a driving chain.
15. Establish the generator with an arm on the engine and screw bolts, having tightened them the demanded moment. Connect electric wires to the generator.
16. Establish the sensor of an angle of rotation of a cranked shaft 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.


17. Establish an arm of the fan of a radiator and fix bolts, having tightened them the demanded moment.
18. Establish into place the pump of the amplifier of a steering and fix bolts.
19. Apply a thin film hermetic on both parties of a bolt of a cover of the driving chain, the fastening of the amplifier of a steering located on an arm.
20. Turn an arm of the pump of the amplifier of a steering and fix bolts then tighten the central bolt of fastening.
21. Establish the top cover of a driving chain.
22. At existence connect a hose of system of a being self-leveled back suspension bracket to a pipe on the forward party of a head of the block of cylinders.
23. Establish a bolt and a nut, fixing a forward eye for engine lifting.
24. Establish a new sealing ring of round section on a pipe of supply of cooling liquid, establish a pipe on the pump and fix bolts.
25. Establish a pulley cranked a shaft / quencher of krutilny fluctuations and a nave.
26. Establish pulleys of an auxiliary driving belt and an auxiliary driving belt.
27. Establish a pipe of an air inlet and fix it a bolt.
28. Establish a krylchatka of the fan and a radiator.
29. Establish the air filter.
30. Establish the bottom mudguard of the engine.
31. Add cooling liquid in cooling system.
32. Check level of engine oil and, if necessary, finish it to norm.
33. Connect a weight wire to the accumulator.