Mazda 3 Service Manual: Positive Crankcase Ventilation (PCV) Valve Removal/Installation [Mzr 2.0, Mzr 2.5]

1. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Remove the intake manifold and the fuel distributor component as a single unit..

4. Remove in the order indicated in the table.

5. Install in the reverse order of removal.

Retainer Removal Note

CAUTION:

• Be sure to follow the removal procedures below to prevent the leakage of blow-by gas caused by the damage to the tab of the oil separator or the oil separator itself.

1. Insert a flat blade screwdriver with its tip wrapped in a cloth into the gap between the retainer and the oil separator as shown in the figure.

2. Spread the side surface of the retainer outward to dismount it with attention to the tab.

Retainer Installation Note

CAUTION:

• Be sure to replace the old retainer with a new one to prevent the escape of blow-by gas. Reinstalling the old retainer will reduce airtightness.

1. Make sure that the retainer alignment mark is directed as shown in the left diagram before installing the retainer to the oil separator.