LEXUS RX 300

1998-2003 of release

Repair and car operation



Лексус RX 300
+ Cars Lexus RX-300
+ Controls and operation receptions
+ Options and car routine maintenance
- The engine
   The general information and preparatory operations
   Check компрессионного pressure
   Check of the engine by means of the vacuum gauge
   Reduction of the piston of the first cylinder in position of the top dead point (ВМТ)
   Check of a corner of an advancing of ignition
   Removal, check and installation of a belt of drive ГРМ it натяжителя, a pulley and a cogwheel of a cranked shaft, cogwheels of camshafts and intermediate rollers
   Removal, dismantling, check, assemblage and installation of a head of cylinders and its components
   Removal and engine installation, check of support
   The block of cylinders
   Check Д/В of pressure of impellent oil
   Removal, dismantling, check, assemblage and installation of the oil pump and the pallet картера
+ Systems of cooling of the engine, heating, ventilation and air conditioning
+ The power supply system and release of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Basic schemes of electric connections


Check of the engine by means of the vacuum gauge

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, the power supply system is damaged, piston rings are damaged, the system of injection of fuel is incorrectly adjusted, valves etc. Unfortunately are damaged, vacuum gauge indications can be interpreted incorrectly, therefore these measurements should be used 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.

Variants of indications of the vacuum gauge at diagnostics of malfunctions of the engine

 PERFORMANCE ORDER

  1. Connect the vacuum gauge to the inlet pipeline. Start and warm up the engine to normal working temperature.
  2. Consider vacuum gauge indications.
    • If the engine is in a normal condition, vacuum gauge indications should be constants and make 430560 mm hg
    • Low constant indications of the vacuum gauge testify to lining damage between the inlet pipeline and the throttle case, damage of the vacuum hose, incorrectly established moment of ignition or incorrectly established phases газораспределения.
    • If indications of the vacuum gauge below norm on 80200 mm hg also fluctuate, that, probably, the lining of the inlet pipeline near to an entrance aperture is damaged or the injector is faulty.
    • If indications constantly fall on 50100 mm hg concerning stable value, that, probably, valves are damaged. In this case it is necessary to measure a compression in engine cylinders (the Door Section see).
    • If indications fall, but that is not regular, probably, gets jammed the valve or there is a failure in ignition.
    • If indications quickly fluctuate with amplitude about 100 mm hg at constant turns of idling, and from an exhaust pipe there is a smoke, probably, directing plugs of valves are damaged.
    • If indications quickly fluctuate at increase in turns of idling, that, probably, the lining of the inlet pipeline or a lining of a head of the block of cylinders is damaged, springs of valves are weakened, valves have scorched or there is a failure in ignition.
    • Small fluctuations about 25 mm are hg usually connected with failures in ignition system.
    • If indications strongly fluctuate, that, probably, the lining of a head of the block of cylinders or the cylinder is damaged.
    • If the arrow slowly moves in wide limits of values, that, probably, the system of operated ventilation картера is littered, the lining of the inlet pipeline or a lining between the case throttle заслонки and the pipeline is damaged.
  3. Check up, indications of the vacuum gauge after sharp and full opening throttle заслонки and its reset are how much quickly restored. If the engine is in a normal condition, 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. 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 system of release ОГ is littered.





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