LEXUS RX 300

1998 — 2003 of release

Repair and car operation



RX 300 Lexus
+ Lexus RX-300 Cars
+ Governing bodies and operation receptions
+ Settings and routine maintenance of the car
- Engine
   General information and preparatory operations
   Check of kompressionny pressure
   Engine check by means of the vacuum gage
   Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)
   Check of a corner of an advancing of ignition
   Removal, check and installation of a belt of a drive of GRM of its natyazhitel, pulley and cogwheel of a cranked shaft, cogwheels of camshafts and intermediate rollers
   Removal, dismantling, check, assembly and installation of a head of cylinders and its components
   Removal and engine installation, check of support
   Block of cylinders
   Check Д/В of pressure of impellent oil
   Removal, dismantling, check, assembly and installation of the oil pump and case pallet
+ Systems of cooling of the engine, heating, ventilation and air conditioning
+ the Power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schematic diagrams of electric connections



Engine check by means of the vacuum gage

Using the vacuum gage, it is possible to receive information on a condition of the engine and to define that laying 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. are damaged. Unfortunately, indications of the vacuum gage can be interpreted incorrectly therefore these measurements should be used in a combination to other methods of check of the engine. For the correct definition are important both absolute value of indications of the vacuum gage, and speed of their change.

Versions of indications of the vacuum gage at diagnostics of malfunctions of the engine

 PERFORMANCE ORDER

  1. Connect the vacuum gage to the inlet pipeline. Start and warm up the engine to normal working temperature.
  2. Consider vacuum gage indications.
    • If the engine is in a normal state, indications of the vacuum gage should be constants and make 430÷560 mm of mercury.
    • Low constant indications of the vacuum gage testify to laying damage between the inlet pipeline and the throttle case, damage of the vacuum hose, incorrectly established moment of ignition or incorrectly established phases of a gazoraspredeleniye.
    • If indications of the vacuum gage are lower than norm on 80÷200 mm of mercury. also hesitate, that, possibly, laying of the inlet pipeline near an entrance opening is damaged or the injector is faulty.
    • If indications constantly fall on 50÷100 mm of mercury. rather stable value, that, probably, valves are damaged. In this case it is necessary to measure a compression in engine cylinders (see. Door section).
    • If indications fall, but is not regular, that, probably, gets jammed the valve or there is a failure in ignition.
    • If indications quickly fluctuate with amplitude about 100 mm of mercury. 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, possibly, laying of the inlet pipeline or laying of a head of the block of cylinders is damaged, springs of valves are weakened, valves scorched or there is a failure in ignition.
    • Small fluctuations about 25 mm of mercury. are usually connected with failures in ignition system.
    • If indications strongly fluctuate, that, possibly, laying of a head of the block of cylinders or the cylinder is damaged.
    • If the arrow slowly moves largely values, that, possibly, the system of operated ventilation of a case is littered, laying of the inlet pipeline or laying between the case of a butterfly valve and the pipeline is damaged.
  3. Check, vacuum gage indications after sharp and complete opening of a butterfly valve and its reset are how fast restored. If the engine is in a normal state, indications fall almost to zero, then increase approximately on 130 mm of mercury. higher norms and again decrease to former values at constant turns of idling. If indications are restored slowly and pass through a maximum after butterfly valve closing, that, probably, piston rings are damaged. If there is a long delay, that, possibly, the system of release of OG is littered.