mazda Workshop Repair Guides

Mazda Workshop Service and Repair Manuals

Positive Crankcase Ventilation|Locations|Page 3923 > < Positive Crankcase Ventilation|Locations|Page 3921
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Positive Crankcase Ventilation: Description and Operation

PCV System

PURPOSE

Relieve crankcase pressure and prevent crankcase blowby vapors from entering the atmosphere.

LOCATION

PCV valve is in valve cover.

OPERATION

PCV valve is operated by intake manifold vacuum. At idle, only a small amount of blowby gas is drawn into the dynamic chamber. As engine
speed increases, the quantity of blowby gas drawn in increases.

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