1998-2003 of release

Repair and car operation

Lexus 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
+ Transmissionnaja line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Basic schemes of electric connections

Check компрессионного pressure

For performance of procedure of check компрессионного pressure the help of the assistant is required.

Gauging компрессионного pressure allows to make general idea about a current condition of such internal components of the engine, as linings of heads of cylinders, elements клапанного the mechanism, pistons and piston rings. The analysis of results of check allows to define, whether the engine requires capital regenerative repair, or it is enough to replace only a sealing lining of a head of cylinders. Measurement is made with the help компрессометра.


  1. Warm up the engine to normal working temperature (an order 80 hailstones.) also muffle it.
  2. Make sure of completeness of a charge of the storage battery that at проворачивании the engine a starter it was possible to receive not less than 250 rpm.
  3. Remove обтекатель a windscreen (the Body see the Head).
  4. Turn out spark plugs (the Section Check and replacement of spark plugs see).
  1. Prepare компрессометр and screw its nozzle in a candle aperture of one of cylinders.
  1. Completely open throttle заслонку and, turning the engine a starter, consider indications компрессометра. Write down result of measurement.

Time of carrying out of measurement should be as it is possible more shortly.

  1. Repeat procedures for the remained cylinders of the engine.
  2. Compare results of measurement by requirements of Specifications of the Head the Engine.
  3. The compression grows in the serviceable engine very quickly. The low value shown after the first cycle, increasing with the subsequent cycles, specifies in deterioration of piston rings. Low value after the first cycle, not increasing after the following, specifies in presence of leaks through valves, or on the punched lining of a head of the cylinder (the crack in a head can be the reason also). In compression decrease can result deposit presence on plates of valves.
  4. The results received at measurement of a compression, should be about identical to all cylinders. If pressure is in any cylinder at level minimum admissible and even more low for reason finding-out pour in in the cylinder through a candle aperture a teaspoon of impellent oil and repeat compression measurement.
  5. If oil addition has temporarily improved a compression, the reason of its decrease, most likely, is deterioration of the piston, rings or the cylinder. If the compression increase has not occurred, it is possible to assume that the reason – in негерметичности valves or the punched lining of a head of the block.
  6. The low compression in two next cylinders almost for certain is a consequence of breakdown of a lining of a head. Presence of a cooling liquid in chambers of combustion or in картере the engine will confirm this assumption.
  7. If a compression in one of cylinders approximately on 20 % more low, than in the others, besides idling turns are astable, the reason, probably, excessive deterioration of a cam of a camshaft.
  8. After check carrying out disconnect компрессометр and establish acting in film components.