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
+ 6. Repair of the diesel engine established in the car
- 7. Major maintenance of engines
   7.2. General information
   7.3. Recommendations about engine removal
   7.4. Removal and installation of 4-cylinder petrol engines
   7.5. Removal and installation of 6-cylinder petrol engines
   7.6. Removal and installation of diesel engines
   7.7. Sequence of dismantling of the engine
   + 7.8. Analysis of a head of the block of cylinders
   + 7.9. Assembly of a head of the block of cylinders
   7.10. Removal of pistons with rods
   7.11. Removal of a cranked shaft
   7.12. Block of cylinders of the engine
   7.13. Pistons and rods
   7.14. Cranked shaft
   7.15. Survey of radical and shatunny bearings
   7.16. Engine balance of assembly at major maintenance
   7.17. Installation of piston rings
   7.18. Installation of a cranked shaft
   7.19. Check of a working gap of radical bearings
   7.20. Installation of a cranked shaft
   + 7.21. Installation of pistons with rods
   7.22. Engine start after major maintenance
+ 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



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7.17. Installation of piston rings
GENERAL INFORMATION

Gap measurement in the lock of a piston ring

 

Installation on the piston of a dilator of a maslosjemny ring

 

Arrangement of piston rings on the piston

1–top sealing ring;

2–average sealing ring;

3–maslosjemny ring

PERFORMANCE ORDER
1. Before installation of new piston rings check a gap in the ring lock.
2. Arrange pistons and piston rings according to cylinders in which they will work.
3. Establish the top sealing ring in the first cylinder and the bottom of the piston push it in the cylinder to the cylinder basis.
Prevention

The top and average sealing rings are various, an external surface of an average ring the konusny.
4. Using щуп, measure a gap in the ring lock.
5. Repeat measurement process with a ring established in the top part of the cylinder and compare results of measurement to specifications.
6. If too small, it it is necessary to increase a gap, soshlifovyvy ring end faces.
7. If a gap in the lock of a ring too big, check correctness compliance of rings to your engine.
8. Repeat check operation for each ring in the first cylinder and then for rings in other cylinders.
9. Establish piston rings on pistons in the same way, as well as at removal.
10. At installation of a maslosjemny ring first of all establish a dilator, then a ring, having displaced the ring lock on 180 ° from a dilator ledge. Check, that marking of TORAHS on rings was directed up (see fig. An arrangement of piston rings on the piston). Arrange locks of the top and average kompressionny rings with shift on 120 ° from the lock of a maslosjemny ring. Check, that locks of piston rings were not combined with an axis of a piston finger.