Toyota Land Cruiser 100/Amazon, Lexus LX 470

since 1997 of release

Repair and car operation

Toyota Land Cruiser, Amazon, LX470 Lexus
+ Identification numbers of the car
+ Governing bodies and receptions of safe operation of the car
+ Settings and routine maintenance of the car
+ Engine
+ Systems of cooling of the engine, salon and air conditioning heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
- Control systems of the engine and decrease in toxicity of the fulfilled gases
   System of onboard diagnostics (OBD) - a principle of functioning and codes of malfunctions
   Oscillograph application for supervision of working signals of a control system
   Check of a condition and ESM replacement
   Information sensors - the general information and check of serviceability of functioning
   Replacement of information sensors
   System of catching of fuel evaporations (EVAP) - the general information, check of a condition and replacement of components
   System of operated ventilation of a case (PCV)
   The catalytic converter - the general information, check of a condition and replacement
+ gear shifting Box
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

System of operated ventilation of a case (PCV)

General information

The scheme of movement of a stream of karterny gases in the engines equipped with PCV system of a typical design

The PCV system (address to an illustration above) serves for decrease in issue in the atmosphere of hydrocarbonic connections at the expense of a conclusion from the engine of karterny gases. The purge of the block is carried out by pro-race of fresh air arriving from an air purifier through a case in which it mixes up with the collected evaporations and broken of chambers of combustion by gases and deduced via the PCV valve in the inlet pipeline.

The PCV valve, air inlet and set of the vacuum hoses connecting listed devices to the engine belong to number of the main components of system.

For the purpose of maintenance of stability of turns of idling the PCV valve blocks a purge stream at deep depression in the inlet pipeline. In case of violation of serviceability of functioning of the engine (as, for example, at wear process of piston rings) the system makes branch of excess of karterny gases through a ventilating tube back in an air purifier and their reburning in combustion chambers.

Intake of karterny gases in the engine is carried out through the case of a throttle which starts to become covered over time by tarry deposits, in particular around a butterfly valve arrangement. In view of told, it is necessary to make cleaning of the case of a throttle from time to time.



1. For check of serviceability of functioning of the PCV valve it should be liberated from the rubber landing plug and to shake. The serviceable valve when stirring should publish the noise proceeding from a locking needle, – in case of need make replacement of klapanny assembly.
2. Start the engine on single turns and press a finger to an opening in the valve, – in assembly depression should take place. If depression is not felt, at first check passableness of a vacuum hose, then (if a hose as it should be) replace the valve.



1. Having pulled vertically up, take the valve from the rubber landing plug. Estimate a plug condition, in case of need make replacement.
2.Если the valve is hammered by tarry deposits, the probability of violation of passableness of a connecting hose is not excluded also, – remove a hose and wash out it solvent.
3.Промыв a hose, check it on existence of signs of aging of a material and mechanical damages. Track reliability of fixing of a hose on reception unions.
4. In case of need make PCV valve replacement.