Positive Crankcase Ventilation (PCV) Valve Inspection [H3T]

Remove the windshield wiper motor and link. (See WINDSHIELD WIPER MOTOR AND LINK REMOVAL/INSTALLATION .)
Remove the cowl grille braket. (See ENGINE REMOVAL/INSTALLATION [H3T] .)
Remove the side cowl grille. (See COWL GRILLE REMOVAL/INSTALLATION .)
Remove the strut tower bar. (See DRIVER-SIDE STRUT TOWER BAR REMOVAL/INSTALLATION .) (See PASSENGER-SIDE STRUT TOWER BAR REMOVAL/INSTALLATION .)
Remove the engine compartment insulator (Upper). (See ENGINE REMOVAL/INSTALLATION [H3T] .)
Disconnect the ventilation hose. (See CYLINDER HEAD COVER REMOVAL/INSTALLATION [H3T] .)
Start the engine and verify that vacuum is applied to the end of the hole while the engine is idling.
- If vacuum is not applied to the ventilation hose, perform the procedure from Step 8.

Disconnect the PCV hose.

Courtesy of MAZDA MOTORS CORP.

PART NAME DESCRIPTION

Step	Part name
1	PCV hose

Verify that there is no airflow when pressure (5 kPa {0.05 kgf/cm² , 0.7 psi} or more) is applied to port B.

Courtesy of MAZDA MOTORS CORP.

SYMBOL AND CONTENT DESCRIPTION

Symbol Content

1 Port B
- If there is airflow, replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [H3T] ).
Verify that there is airflow when vacuum is applied to port B.
- If there is no airflow, replace the PCV valve. (See POSITIVE CRANKCASE VENTILATION (PCV) VALVE REMOVAL/INSTALLATION [H3T] ).