mazda Workshop Repair Guides

Mazda Workshop Service and Repair Manuals

Fuel Delivery and Air Induction > < Positive Crankcase Ventilation|Description and Operation
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Positive Crankcase Ventilation: Testing and Inspection

Checking PCV Valve

1.

Warm engine to operating temperature and run at idle.

2.

Disconnect valve with ventilation hose from cylinder head cover.

3.

Block valve opening and check that vacuum is felt.

PCV Valve

4.

Remove valve.

5.

Blow through from port "A" and verify that air comes out port "B".

6.

Blow through from port "B" and verify that no air comes out port "A".

7.

Replace valve if not as specified.

Fuel Delivery and Air Induction > < Positive Crankcase Ventilation|Description and Operation