Subaru Legacy

since 1990-1998 release

Repair and operation of the car



Subaru of Legasi
+ 1.1. Identification numbers
+ 2. Maintenance
- 3. Engines
   3.1. Technical characteristics
   3.2. Operations on repair of the engine installed in the car
   3.3. Top dead point of the first cylinder
   3.4. Cover of a head of the block of cylinders
   3.5. Inlet collector
   + 3.6. Gear belt and pulleys
   3.7. Replacement of a forward sealing ring of a cranked shaft
   3.8. Replacement of sealing rings of camshafts
   3.9. Camshafts and pushers
   3.10. Heads of the block of cylinders
   3.11. Oil pallet
   3.12. Oil pump
   3.13. Drive flywheel / plate
   3.14. Replacement of a back sealing ring of a cranked shaft
   3.15. Suspension bracket of the power unit
   - 3.16. Capital repairs of the engine
      3.16.1. Technical characteristics
      3.16.2. Check of a compression
      3.16.3. Check of the engine by means of the vacuum gage
      3.16.4. Recommendations about removal of the engine
      3.16.5. Removal of the engine
      3.16.6. Sequence of dismantling of the engine
      3.16.7. Dismantling of a head of the block of cylinders
      3.16.8. Cleaning and survey of a head of the block of cylinders
      3.16.9. Assembly of a head of the block of cylinders
      3.16.10. Removal of pistons
      3.16.11. Division of sections of blocks of cylinders
      3.16.12. Removal of a cranked shaft with rods
      3.16.13. Block of cylinders of the engine
      3.16.14. Honingovaniye of cylinders
      3.16.15. Rods
      3.16.16. Cranked shaft
      3.16.17. Survey of radical and shatunny bearings
      3.16.18. Balance of assembly of the engine at capital repairs
      3.16.19. Survey of pistons
      3.16.20. Check of working gaps of shatunny bearings
      3.16.21. Check of working gaps of radical bearings of a cranked shaft
      3.16.22. Assembly of sections of the block of cylinders
      3.16.23. Installation of piston rings
      3.16.24. Installation of pistons
      3.16.25. Installation of the engine
      3.16.26. Start of the engine after capital repairs
+ 4. Heating, ventilation
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. Suspension bracket
+ 12. Steering
+ 13. Body
+ 14. Electric equipment





3.16. Capital repairs of the engine

GENERAL INFORMATION

This part of the head included the general methods of dismantling of a head of the block of cylinders and other knots of the engine.

Information concerns sequence of preparation for repair and the step-by-step description of operations of removal and installation of components of the engine, and their check.
It is not always easy to define as where in the engine demands repair. Too many factors should be taken into account. Big run of the engine is not always the prerequisite to repair and, on the contrary, small run does not guarantee lack of need under repair.

The raised consumption of oil testifies to need to pay attention to a condition of piston rings, oil scraper caps and the directing valves. At making decision on repair of the specified knots make sure of lack of a leak of oil. Measurement of a compression in engine cylinders can give additional information on volumes of repair.

Check oil pressure size by means of the manometer installed instead of the oil pressure sensor.

The sensor of pressure of oil is installed in the top part of the block of cylinders about the generator.

For improvement of access to the sensor of pressure of oil it is necessary to remove the generator.

The lowered size of pressure of oil testifies to wear of bearings or damage of the oil pump.
Falling of power, uneven operation of the engine, blows and mechanical noise, the increased noise of the valvate mechanism and high fuel consumption, as a rule, testifies to need of repair. Especially if all these troubles arose at the same time.