Tojota Lend Kruzer, Amazon, Leksus LX470
+ Identification numbers of the car
+ Controls and receptions of safe operation of the car
+ Options and car routine maintenance
- The engine
- Typical procedures of service of engines
Preparatory actions and the list of repair procedures which can be executed without extraction of the engine from the car
Reduction of the piston of the first cylinder in position of the top dead point (ВМТ)
Check of pressure of oil
Check компрессионного pressure in cylinders
+ Procedures of service of the petrol engine
+ Procedures of service of the diesel engine
+ Systems of cooling of the engine, salon and air conditioning heating
+ The power supply system and release of the fulfilled gases
+ Engine electric equipment
+ Control systems of the engine and decrease in toxicity of the fulfilled gases
+ Gear change box
+ Transmissionnaja line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Check компрессионного pressure in cylinders
Results of check компрессионного pressure in cylinders allow to define the general condition of components of the top part of the engine (pistons, piston rings, valves, linings of a head of cylinders, etc.) and qualitatively to estimate degree of their deterioration. That is especially important, the analysis of the information received as a result of check allows to narrow a spectrum of the possible reasons of falling of a compression in cylinders, precisely enough having adhered refusal to infringements of functioning of quite concrete components, whether it be piston rings, valves, their saddles or a head lining.
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The engine should be heated-up to normal working temperature, and the storage battery is completely charged.
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The petrol engine
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1. Begin with procleaning of candle niches (blow their compressed air as which source in this case the ordinary bicycle pump perfectly will approach). The Primary goal is prevention of hit of dust in cylinders during performance of measurements.
2. Turn out from the engine all spark plugs (see the Head of Adjustment and car routine maintenance).
3. Fix throttle заслонку in completely open position.
4. Disconnect ignition system For what take from the assembly block safety lock IGN (see the Head the engine Electric equipment). Also disconnect electroconducting from the fuel pump (see the Head of the Power supply system and release of the fulfilled gases).
5. Establish компрессиометр in a candle aperture of the first cylinder.
6. Turn the engine at least on seven steps of compression and consider the measuring instrument indication. On the serviceable engine pressure should accrue quickly enough. Low pressure upon the first step, accompanied by its gradual increase on the subsequent, speaks about deterioration of piston rings. If at further проворачивании a shaft pressure does not rise, it can be regarded as the certificate of leaks of valves or infringement of tightness of a lining of a head of cylinders (the probability of presence of cracks in a head is not excluded also). The congestion of adjournment on working facets of plates of valves also can lead to decrease компрессионного pressure. Write down the maximum indication компрессиометра.
7. Repeat procedure for the remained cylinders of the engine. Compare results to standard requirements (Specifications see).
8. At excessively low results of measurement, fill in in each of cylinders through a candle aperture a little impellent oil (two-three teaspoons) and repeat check.
9. If oil addition leads to pressure increase, it speaks about deterioration of piston rings. If the compression does not increase, the reason of its decrease are leaks of valves or infringement of tightness of a lining of a head. Leaks of valves can be connected with a burn-out of their saddles, either deformation/burn-out or mechanical damages of working facets.
10. If pressure of compression is equally underestimated in two next cylinders with high degree of probability it is possible to speak about infringement of integrity of a lining of a head within its crosspiece between the given cylinders. Presence of a cooling liquid at impellent oil will confirm the given assumption.
11. If pressure in one of cylinders approximately on 20 % more low, than in other and it is accompanied by infringement of stability of turns of idling, it is necessary to estimate degree of deterioration of cams of a drive of corresponding valves on a camshaft.
12. Unusual overestimate компрессионного usually is a consequence of pressure excessive нагарообразования in combustion chambers. In this case the head of cylinders should be removed for the purpose of carrying out декарбонизации.
13. At excessively low results of measurements, and also in case of infringement of uniformity of distribution of pressure between cylinders it will be useful to hold testing of the engine for leaks in the conditions of a car-care centre workshop. Such check will allow to define precisely a source of leak and to estimate degree of its gravity.
14. Establish into place safety locks and make on the car a short trip for the purpose of restoration written down in memory of the processor of adjusting parametres. |
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The diesel engine
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Measurement компрессионного pressure in cylinders of the diesel engine is made by the same principle, as on the petrol engine, however the manometre is established instead of a fuel atomizer. Removal of atomizers is described in the Head of the Power supply system and release of the fulfilled gases.
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At carrying out of check the others 5 atomizers should be established. |
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