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
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Check of kompressionny pressure
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For performance of procedure of check of kompressionny pressure the help of the assistant is required. |
Measurement of kompressionny pressure allows to make general idea about current state of such internal components of the engine, as laying of heads of cylinders, elements of the klapanny mechanism, pistons and piston rings. The analysis of results of check allows to define, whether the engine needs major regenerative maintenance, or it is enough to replace only sealing laying of a head of cylinders. Measurement is made with the help компрессометра.
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- Warm up the engine to normal working temperature (about the 80th hail.) also muffle it.
- Make sure of completeness of a charge of the storage battery that at an engine provorachivaniye a starter it was possible to receive not less than 250 rpm.
- Remove a windscreen fairing (see. Head Body).
- Turn out spark plugs (see. Section Check and replacement of spark plugs).
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Prepare компрессометр and screw its nozzle in a candle opening of one of cylinders.
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- Completely open a butterfly valve and, turning the engine a starter, consider indications компрессометра. Write down result of measurement.
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Time of carrying out measurement should be as it is possible more shortly. |
- Repeat procedures for the remained cylinders of the engine.
- Compare results of measurement by requirements of Specifications of Head the Engine.
- The compression grows in the serviceable engine very quickly. The low value shown after the first cycle, increasing with the subsequent cycles, indicates wear of piston rings. Low value after the first cycle, not increasing after the following, indicates existence of leaks via valves, or on the punched laying of a head of the cylinder (the crack in a head can be the reason also). To decrease in a compression can lead deposit existence on plates of valves.
- The results received at measurement of a compression, should be approximately identical to all cylinders. If pressure is in any cylinder at level minimum admissible and even below, for clarification of the reason pour in in the cylinder through a candle opening a teaspoon of impellent oil and repeat compression measurement.
- If oil addition temporarily improved a compression, the reason of its decrease, most likely, is wear of the piston, rings or the cylinder. If the increase in a compression did not occur, it is possible to assume that the reason – in a leakage of valves or the punched laying of a head of the block.
- The low compression in two next cylinders almost for certain is a consequence of breakdown of laying of a head. Availability of cooling liquid in chambers of combustion or in a case of the engine will confirm this assumption.
- If the compression in one of cylinders approximately for 20 % is lower, than in the others, besides turns of idling are unstable, the reason, probably, excessive wear of a cam of a camshaft.
- After carrying out check disconnect компрессометр and establish acting in film components.
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