Subaru Legacy

since 1990-1998 release

Repair and operation of the car



Subaru Legacy
+ 1.1. Identification numbers
- 2. Maintenance
   2.1. Introduction
   2.2. Technical characteristics
   2.3. Frequency of service
   2.4. Check of level of engine oil
   2.5. Level of cooling liquid
   2.6. Level of brake fluid and liquid of the drive of coupling
   2.7. Liquid for a windshield washer
   2.8. Check of the accumulator
   2.9. Tires and check of pressure in tires
   2.10. Check of level of oil in the automatic transmission
   2.11. Check of level of liquid in the amplifier of steering
   2.12. Replacement of oil and oil filter
   2.13. Check and service of the accumulator
   2.14. Accumulator charging
   2.15. Check of the cooling system
   2.16. Check of hoses, tubes and their replacement
   2.17. Check and replacement of brushes of screen wipers
   2.18. Shift of tires
   2.19. Check of a suspension bracket and steering
   2.20. Check of the exhaust system
   2.21. Check of level of oil in the transmission and the main transfer
   2.22. Check of level of oil in differential (the main transfer)
   2.23. Check of the brake system
   2.24. Check of the vacuum amplifier of brakes
   2.25. Check of the emergency brake
   2.26. Check of fuel system
   2.27. Replacement of the fuel filter
   2.28. Check and replacement of a driving belt
   2.29. Check of a free wheeling of a pedal of a brake
   2.30. Check of a free wheeling of a pedal of coupling
   2.31. Check and replacement of spark plugs
   2.32. Check of high-voltage wires
   2.33. Check and adjustment of turns of idling
   2.34. Replacement of the air filter
   2.35. Check and replacement of the valve of ventilation of a case (PCV)
   2.36. Check of system of catching of vapors of fuel
   2.37. Check of system of repeated combustion of exhaust gases (EGR)
   2.38. Service of the cooling system
   2.39. Replacement of brake fluid
   2.40. Replacement of oil in the automatic transmission
   2.41. Replacement of oil in the mechanical transmission
   2.42. Check and adjustment of gaps of valves
   + 2.43. Main malfunctions
+ 3. Engines
+ 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






2.31. Check and replacement of spark plugs

GENERAL INFORMATION

Tools necessary for replacement of spark plugs

1 – a key for a spark plug vyvinchivaniye
2 – dynamometer key
3 – a key head with a ratchet
4 – extender
5 – a template for measurement of an interelectrode gap of a spark plug

For replacement of spark plugs it is necessary to use a special key for unscrewing of candles with the rubber condensing ring which allows to take the unscrewed spark plug from a nest. For replacement of spark plugs gather all necessary tools.

PERFORMANCE ORDER
1. When replacing candles prepare new candles of the required type.
2. Check an interelectrode gap in new candles by means of a template.
3. If necessary adjust an interelectrode gap. For correction of a gap turn in only a side electrode.
4. Not to mix high-voltage wires, you make replacement of spark plugs in turn. At removal of high-voltage wires from spark plugs use the special tool. Pull not for a wire, and for a protective cover.
5. Unscrew a spark plug. On the engine of 2,5 l for access to spark plugs on the left side of the engine, it is necessary to remove the accumulator and a broad tank.
6. Visual control of a working part of spark plugs can show, a condition of the engine. If the nasal part of the isolation center of spark plugs pure and white, without raid, then it testifies to too poor mix. It also specifies that a candle too hot, that is heat from the central electrode is taken away slowly. If this is so, then it is necessary to adjust composition of mix or to replace a candle. If the nasal part of the isolation center of a candle is covered with a black raid, then it means that mix too rich. If the raid black and oily, then it testifies to wear of the engine and need of its check and repair. If the nasal part of the isolation center is covered with a light brown raid, then the composition of mix is optimum, and the engine is in good shape.
7. The interelectrode gap of a spark plug is of great importance as at too big and at too small gap the spark size changes that leads to decrease in overall performance of the engine. The gap has to conform to technical requirements always.
8. Before installation of a spark plug in the engine check that the carving was pure and all threads of a carving whole. Apply a thin film of antiprigarny material on a candle carving.
9. For screwing up of a candle on several rounds it is possible to use a piece of a rubber hose into which on the one hand to insert the insulator of a candle and, rotating a hose, to screw up a candle on several rounds, then it is necessary to remove a hose and to screw up a candle the required moment.