CAR PCV valve

Crankcase ventilation system: common defects and their signs

  1. Clogging of the oil separator or pipes.
    • Engine power lowers.
    • Fuel consumption increased.
    • The throttle flap is soiling fast.
    • Operation of the engine at idling worsens.
    • The air filter is oiled.
  2. Jamming of the crankcase gases recirculation valve.
    • Oil consumption increases.
    • Foreign noise appears in the intake manifold and valve area.
    • Vehicle dynamics worsens.
    • Engine smoking occurs.

How to repair or replace crankcase ventilation system?

Repair of the crankcase ventilation unit lies in replacement of defective elements, caused its inoperability. The actions sequence during components replacement depends on the system type, which can be open or close. Most of all, the crankcase ventilation system of the close type is installed on the cars; its construction is more complicated. In order to gain access to defective elements of the system you need to demount the electronic throttle valve and the idle air control valve. Sometimes demounting of the intake manifold may be required. Then, if the broken valve needs to be replaced, you need to disconnect the crankcase ventilation hose from it, demount the part and install a new one. If damages of the ventilation hose are present, its should be replaced also.

It is recommended to entrust replacement of the crankcase ventilation system elements to professionals of a service station in case of absence of special equipment and car servicing skills.

PCV valve Information

PCV valve: Bestsellers

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