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
   - 4.11. Drive of valves, pushers and camshaft
      4.11.1. Removal
      4.11.2. Dismantling, check and assembly
      4.11.3. Installation
   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






4.11.2. Dismantling, check and assembly

Camshaft

PERFORMANCE ORDER
1. Check working surfaces of bearings of a camshaft and contours of cams of a camshaft on wear. In the presence of any wear replace a camshaft. At replacement of a camshaft it is also necessary to replace yokes.

Drive of valves

Use of bolt М8 (1) for extraction of an axis of a klapanny yoke
At axis installation dredging sideways axes (shooter) should be combined with a bolt (3) fastenings of a cover of the bearing of a camshaft

PERFORMANCE ORDER
1. After removal of covers of bearings of a camshaft from covers of bearings it is possible to remove yokes, taking short axes of yokes from covers. Before removal of yokes check that on them there is a marking, and also note an arrangement of yokes concerning a cover of the bearing of a camshaft.
2. For extraction of an axis of a yoke from a cover of the bearing of a camshaft it is necessary to use an inertial hammer with a special adapter. Alternatively screw in long bolt М8 with a washer in an axis of a yoke and, striking on a washer with a hammer, extend a yoke axis from a cover of the bearing of a camshaft (see fig. Use of bolt М8 for extraction of an axis of a klapanny yoke). After extraction of an axis remove a yoke. Store the removed details so that in the subsequent it was possible to establish them on the places.
3. Check a condition of contact washers on wear. In the presence of wear it is necessary to replace a detail in a set.
4. Grease working surfaces of a yoke with pure engine oil, then establish yokes on a cover and fix an axis. At repeated installation of details check, that they became on the places. Axes of yokes establish so that dredging for a bolt of fastening of a cover of the bearing of a camshaft in each axis was combined with an opening under a bolt in a bearing cover. In the absence of special tools for a press fitting of an axis of yokes press an axis with use of long bolt М8 and a hammer.

Hydraulic pushers

Yoke details

1–yoke;

2–prokladochny washer;

3–hydraulic pusher;

4–contact washer


Check of serviceability of a hydraulic pusher of valves

1–steel wire in diameter of 1,5 mm;

2–chamber of supply of oil;

3–ball valve


PERFORMANCE ORDER
1. For pusher extraction from a yoke insert the corresponding drift through an opening in the top part of a yoke and squeeze out a pusher from a yoke.
2. Take a prokladochny washer from a nest for a pusher in a yoke (see fig. Yoke details).
3. Have yoke details so that in the subsequent it was possible to establish them on the places.
4. Check a condition of pushers and, if necessary, replace them.
5. Serviceability of hydraulic pushers can be checked as follows (see fig. Check of serviceability of a hydraulic pusher of valves):
a-establish a hydraulic pusher of the valve vertically;
b-fill in in the chamber of supply of oil in the top part of a pusher pure engine oil;
with - using a steel wire in diameter of 1,5 mm, established through an opening in the pusher center, press the ball valve and release it. Press the ball valve until the working chamber of a hydraulic pusher will not be filled with oil;
d-using the wooden handle of a hammer with force press the top part of the piston of a pusher within 10 seconds. Thus the piston of a pusher should remain on a place;
e-if the piston of a pusher moves down, it is necessary to replace a pusher.
6. Hydraulic pushers of valves are designed in such a manner that the size of a course of a pusher for compensation of a gap of valves is insignificant. It is connected with the insignificant sizes of hydraulic pushers of valves. In order that a course of a hydraulic pusher sufficed for compensation of gaps of valves, prokladochny washers of various thickness are used.
7. If at operation of the engine knock of valves, probably is audible, the size of a klapanny gap does not correspond technical requirements. In this case it is necessary to establish a new prokladochny washer of other thickness.
8. For determination of the demanded thickness of a prokladochny washer it is necessary use of the special tool and this work it is necessary to make at service station.
9. Before installation of hydraulic pushers it is necessary to fill them with engine oil. For this purpose establish pushers vertically in the capacity filled with pure engine oil. A thin steel wire press the ball valve and, moving a plunzher of a pusher up, enter into a working cavity of a pusher oil. Repeat this operation until the working chamber of a hydraulic pusher will not be filled completely with oil.
10. Establish a prokladochny washer in a pusher nest in a yoke, and the oil channel of a washer should be directed to a hydraulic pusher. Establish a hydraulic pusher in a yoke.