Subaru Legacy

Since 1990-1998 of release

Repair and car operation



Subaru Legasi
+ 1.1. Identification numbers
+ 2. Maintenance service
- 3. Engines
   3.1. Technical characteristics
   3.2. Operations on repair of the engine established in the car
   3.3. The top dead point of the first cylinder
   3.4. A cover of a head of the block of cylinders
   3.5. An inlet collector
   + 3.6. A 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. The oil pallet
   3.12. The oil pump
   3.13. The Flywheel / a drive plate
   3.14. Replacement of a back sealing ring of a cranked shaft
   3.15. A suspension bracket of the power unit
   - 3.16. Engine major repairs
      3.16.1. Technical characteristics
      3.16.2. Compression check
      3.16.3. Check of the engine by means of the vacuum gauge
      3.16.4. Recommendations about engine removal
      3.16.5. Engine removal
      3.16.6. Sequence of dismantling of the engine
      3.16.7. Dismantling of a head of the block of cylinders
      3.16.8. Clearing and survey of a head of the block of cylinders
      3.16.9. Assemblage 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 from rods
      3.16.13. The block of cylinders of the engine
      3.16.14. Хонингование cylinders
      3.16.15. Rods
      3.16.16. A cranked shaft
      3.16.17. Survey radical and шатунных bearings
      3.16.18. Engine balance of assembly at major repairs
      3.16.19. Survey of pistons
      3.16.20. Check of working backlashes шатунных bearings
      3.16.21. Check of working backlashes of radical bearings of a cranked shaft
      3.16.22. Assemblage of sections of the block of cylinders
      3.16.23. Installation of piston rings
      3.16.24. Installation of pistons
      3.16.25. Engine installation
      3.16.26. Start of the engine after major repairs
+ 4. Heating, ventilation
+ 5. Fuel system
+ 6. An exhaust system
+ 7. Systems of start, ignition
+ 8. Transmissions
+ 9. Coupling, shaft
+ 10. Brake system
+ 11. A suspension bracket
+ 12. A steering
+ 13. A body
+ 14. An electric equipment


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3.16.3. Check of the engine by means of the vacuum gauge
THE GENERAL DATA

Substantive provisions and fluctuations of an arrow of the vacuum gauge at diagnostics of malfunctions of the engine

Using the vacuum gauge, it is possible to receive the information on a condition of the engine and to define that the lining of a head of the block of cylinders is punched, rings are damaged, the power supply system is incorrectly adjusted, valves etc. Unfortunately are damaged, vacuum gauge indications can be interpreted incorrectly, therefore these measurements are necessary for using only in a combination to other methods of check of the engine. For correct definition are important both absolute value of indications of the vacuum gauge, and speed of their change.

PERFORMANCE ORDER
1. Connect the vacuum gauge to an inlet collector. Start and warm up the engine to normal working temperature.
2. Consider vacuum gauge indications. If the engine is in a normal state, vacuum gauge indications should be 430–560 mm Hg, and the arrow of the vacuum gauge should be at a stop.
3. Low constant indications of the vacuum gauge testify that the lining between an inlet collector and the throttle case is damaged, the vacuum hose is damaged, the moment of ignition or wrong installation of phases газораспределения is incorrectly established.
4. If indications of the vacuum gauge below norm on 80–200 mm Hg also fluctuate, that, probably, the lining of an inlet collector near to an entrance aperture is damaged or the injector is faulty.
5. If indications constantly fall on 50–100 mm Hg concerning stable value, that, probably, valves are damaged. In this case it is necessary to measure a compression in engine cylinders.
6. If indications fall, but is not regular, that, probably, gets jammed the valve or there is a failure in ignition.
7. If indications quickly fluctuate with amplitude about 100 mm. рт. ст, at constant turns of idling, and from an exhaust pipe there is a smoke, probably, directing plugs of valves are damaged.
8. If indications quickly fluctuate at increase in turns of idling, that, probably, the lining of an inlet collector or a lining of a head of the block of cylinders is damaged, springs of valves are weakened, have scorched the valve or there is a failure in ignition.
9. Small fluctuations about 25 mm Hg are usually connected with failures in ignition system.
10. If indications strongly fluctuate, that, probably, the lining of a head of the block of cylinders or the cylinder is damaged.
11. If the arrow slowly moves largely values, that, probably, the system of compulsory ventilation картера is littered, the lining of an inlet collector or a lining between the case throttle заслонки and a collector is damaged.
12. Check up, indications of the vacuum gauge after sharp and full opening throttle заслонки and its return to a starting position are how fast restored.
13. If the engine is in a normal state, indications fall almost to zero, then increase approximately on 130 mm Hg above norm and again decrease to former values at constant turns of idling.
14. If indications are restored slowly and pass through a maximum after closing throttle заслонки, that, probably, piston rings are damaged. If there is a long delay, that, probably, the exhaust system is littered.