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HOMESERVICE MANUALSMAZDA20113 MAZDASPEED, 2.3 3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 62 (ENGINE CONTROLS [SYSTEM & COMPONENT TESTING])EMISSION SYSTEMS & SUB-SYSTEMSPOSITIVE CRANKCASE VENTILATIONVALVE INSPECTION - EXCEPT MAZDA6 (3.0L) & MPV
2011 Mazda 3 Mazdaspeed, 2.3 3

Valve Inspection - Except Mazda6 (3.0L) & MPV

2011 Mazda 3 Mazdaspeed, 2.3 3SECTION Valve Inspection - Except Mazda6 (3.0L) & MPV
WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove PCV valve from valve cover. For location, see Figure, Figure or Figure . Blow air into port "A". See Fig 1 or Fig 2 . Air should flow from port "B". Blow air into port "B". Air should not flow from port "A". If airflow is not as specified, replace PCV valve.

Fig 1: Identifying PCV Valve - Mazda6 (2.3L), Protege & Protege5
G00193583Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.