Subaru Legacy/Outback

1999-2003 of release

Repair and car operation



Subaru Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ The operation manual
+ Routine maintenance
- The engine
   Specifications
   Check компрессионного pressure in cylinders and tightness of the block
   Diagnostics of a condition of the engine with vacuum gauge application
   System of greasing of the engine - the general information
   - The procedures of the repair which has been not connected with extraction of the engine from the car, - four-cylinder engines
      Reduction of the piston of the first cylinder in position ВМТ
      Check and adjustment клапанных backlashes
      Removal and installation of a pulley of a cranked shaft
      Removal and installation of forward covers of drive ГРМ
      Removal and installation of a belt of drive ГРМ, check of a condition of components
      Removal, check of a condition and installation of cogwheels of camshafts
      Removal and installation of a cogwheel of a cranked shaft
      Натяжитель газораспределительного a belt - the general information and a functioning principle
      Removal, check of a condition and installation of elements of a drive of valves
      Removal and installation of camshafts
      Removal and installation of heads of cylinders
      Removal and pallet installation картера and маслозаборника
      Removal, service and installation of the oil pump
      Check of pressure of impellent oil
      Removal and installation of the gauge-switch of pressure of oil
      Removal, check of a condition and installation of a flywheel/privodnogo of a disk
      Replacement of support of a suspension bracket of the power unit
   + The procedures of the repair which has been not connected with extraction of the engine from the car, - six-cylinder engines
   + The general and major repairs of engines
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
+ Manual box and differential
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment





The procedures of the repair which has been not connected with extraction of the engine from the car, - four-cylinder engines

Reduction of the piston of the first cylinder in position ВМТ

The general information

As the top dead point (ВМТ) is called the highest point of a piston stroke in the cylinder. Strictly speaking, in 4-taktnyh engines in the course of rotation of a cranked shaft the given position is reached by each of pistons twice: once in the end of a step of compression and the second - in the end of a final step. At performance of options of phases timing and installation of a corner of an advancing of ignition in overwhelming majority of cases position ВМТ of the end of a step of compression of the piston (usually the first cylinder) is used.

Necessity for reduction of the piston (it) in position ВМТ arises at carrying out of many procedures, in particular such, as removal/installation of camshafts and components of drive ГРМ.

Some engines are designed in such a manner that at проворачивании cranked or distributive (ых) shaft at removed газораспределительном a belt/chain there can be an input of valves in contact with the bottoms of pistons that is fraught with risk of damage of corresponding internal components, up to destruction of moulding of a head of cylinders.

 Do not suppose change of position of shaft after belt removal!


Order of performance of procedure

Reduction of any of pistons in position ВМТ is made by проворачивания a cranked shaft of the engine. If to take a detached view of the engine of drive ГРМ, the direction clockwise will be a normal direction of rotation of a cranked shaft. Remember that attempt проворачивания a shaft counter-clockwise can lead to infringement of adjustments of phases timing. Cylinders are numbered with №1 on №4 from the right board of the car to left and in front back. The first is the right forward cylinder; the second - left forward, etc.

Disconnect a negative wire from the battery. For the purpose of simplification проворачивания the engine turn out all spark plugs.

For the purpose of providing of access to label ВМТ on a camshaft cogwheel, uncover drive ГРМ (see Has undressed Removal and installation of forward covers of drive ГРМ).

By means of a key (ST 49977300 – engines of 2.0 l or ST 49977100 - engines 2.5), the fastening of a pulley of a cranked shaft put on a bolt, turn last in a direction of normal rotation until the adjusting label in the form of an arrow () on a cogwheel of a camshaft of the left will not be developed vertically upwards.


At performance of the condition stipulated in the previous paragraph the engine will be resulted in position ВМТ of the end of a step of compression of the piston of the first cylinder.
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