Daewoo Nexia

Since 1994 of release

Repair and car operation

Daewoo Nexia
+ The maintenance instruction
+ Maintenance service
+ The engine
+ 3. The engine (two top camshafts)
+ Cooling system
- Fuel and exhaust systems
   5.2. System of injection of fuel
   5.3. Modes of functioning of system
   - 5.4. The basic knots of system
      5.4.1. A fuel tank, the pump and pipelines
      5.4.2. The distributive fuel pipeline
      5.4.3. Fuel atomizers
      5.4.4. A regulator of pressure of fuel
      + 5.4.5. The case throttle заслонки
      5.4.6. The relay of pressure of oil
      5.4.7. The relay of inclusion of the fuel pump
      5.4.8. Check of giving of the fuel pump
      5.4.9. A fuel tank
      5.4.10. An accelerator pedal
      5.4.11. The fuel filter
      5.4.12. The fuel pump
      5.4.13. Dump of pressure of fuel in system
      5.4.14. The distributive fuel pipeline
      5.4.15. Fuel atomizers
      5.4.16. A regulator of pressure of fuel
      5.4.17. The case throttle заслонки
      5.4.18. The gauge of position throttle заслонки (ДДЗ)
      5.4.19. The idling valve (КХХ)
      5.4.20. Replacement of the case throttle заслонки
      5.4.21. System of compulsory ventilation crankcase (СПВК)
      5.4.22. Check of functioning of the valve of ventilation crankcase (КВК)
      5.4.23. System of release of the fulfilled gases
      5.4.24. Katalitichesky neutralizer
      5.4.25. A reception exhaust pipe and каталитический neutralizer
      5.4.26. The forward muffler with an intermediate exhaust pipe
      5.4.27. The back muffler with an exhaust pipe
+ Electric chain
+ 7. Ignition system
+ 8. The electronic block of management and gauges
+ Transmission
+ 10. A five-speed transmission and the main transfer RPO MM5
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. A forward suspension bracket
+ 15. A drive of forward wheels
+ 16. A back suspension bracket
+ Brake system
+ Body
+ Heating, ventilation
+ Electric equipment

5.4.22. Check of functioning of the valve of ventilation crankcase (КВК)

The ventilation valve crankcase (cut)


If the Engine idles roughly and unstably, it is necessary to check up condition КВК and a ventilating hose. The reason can consist in contamination КВК or a hose. If necessary it is necessary to replace faulty details, being guided by the instructions resulted more low.

1) to Remove КВК from an inlet collector.

2) to Start the Engine on idling.

3) to Close a finger aperture КВК for stock-taking разряжения. If разряжение is absent, to check up on a contamination hoses and an aperture in an inlet collector, and also the valve. To replace faulty details.

4) to Switch off the Engine and to dismantle КВК. To shake the valve. Knock moving запорного a valve element should be thus audible.

If knock it is not audible, it is necessary to replace КВК. Sometimes, for example at strong deterioration of cylinders and piston rings or at long work of the engine with high loading etc., throughput СПВК becomes insufficiently for the admission crankcaseных gases in an inlet collector. In these cases the part crankcaseных gases is taken away in an air cleaner and then burns down in engine cylinders.

Normal work СПВК depends on a condition of consolidations of the engine. If in engine oil there was a deposit or it became more liquid, and СПВК works normally, it is necessary to check up the Engine and to eliminate the found out malfunctions.

Operation of the engine without ventilation crankcase can lead to an engine exit out of operation. Therefore it is important to replace in time faulty КВК and periodically to change an air filtering element (or a separator at its presence). It is necessary to check periodically a condition of ventilating hoses and their collars and to replace defective details.