Toyota Corolla

1992-1998 of release

Repair and car operation

Toyota Corolla
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Systems of cooling, heating
+ 5. Fuel, exhaust systems
- 6. System of decrease in toxicity
   6.1. Specifications
   6.2. Electronic control system
   6.3. Electronic control unit
   + 6.4. System of onboard diagnostics
   + 6.5. Sensors of system of automatic control of the engine
   6.6. Catching system паров gasoline
   6.7. System retsirkulyatsiya (EGR system)
   6.8. System of compulsory ventilation of a case (PCV system)
   6.9. Catalytic converter
+ 7. Transmissions
+ 8. Coupling and semi-axes
+ 9. Brake system
+ 10. Suspension bracket and steering
+ 11. Body
+ 12. Electric equipment

6.8. System of compulsory ventilation of a case (PCV system)


Device of system of compulsory ventilation of a case

The system of compulsory ventilation of a case is intended for decrease in the content of hydrocarbons in engine emissions at the expense of a purge of a case of the engine c by the subsequent suction of vnutrikarterny gases. The fresh air which is selected from the air filter, mixes up in internal space of the engine with vnutrikarterny gases and goes through a zolotnik of system of ventilation for reburning in engine cylinders.

The main components of system are the zolotnikovy device, the channel of selection of air and connecting hoses.

For maintenance of steady operation of the engine the zolotnikovy device which rummages inflow of a mix of vnutrikarterny gases at low depression on the soaking-up highway idling serves. At violation of normal operation of the engine (for example, at wear of piston rings) the vnutrikarterny gases which were formed many go through a ventilating pipe back to the air filter for reburning in the combustion chamber.

The mix of gases and air arrives in the butterfly valve chamber. In area near a butterfly valve later time resinous deposits are formed. It is necessary to delete these deposits periodically.


1. For check of a zolotnik get it from a rubber cover in a cover of a head of cylinders and shake. If knock is distributed, it indicates lack of a contamination of a zolotnik by resinous deposits and on its serviceability. If knock is not present, a zolotnik replace.
2. Start the engine and transfer to an operating mode idling, then put a finger to a zolotnik. If depression is felt, the zolotnik is serviceable. If depression is not felt, either the zolotnik is faulty, or the zolotnik hose is littered. Check also leakage of air in a zolotnik, a maslozalivny mouth and in other hoses.


1. Get a zolotnik. Check existence on a rubber cover of a zolotnik of cracks, hardening and mechanical damages. At detection of damages a cover replace.
2. If the zolotnik is littered, the hose is for certain littered also. Remove a hose and wash out in solvent.
3. After cleaning of a hose check existence of wear tracks and mechanical damages. Be convinced of density of a prileganiye of a hose to unions.
4. If necessary replace a zolotnik.
5. Establish the cleared hose of a zolotnik. Be convinced that the hose strongly adjoins to a zolotnik.