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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2 Of 2) >> Periodic Maintenance >> Positive Crankcase Ventilation >> Inspection
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Positive Crankcase Ventilation: Inspection

  1. Start engine and let it idle.
  2. Replace PCV valve from the rocker cover. Refer to Exploded View .
  3. Connect PCV valve to PCV hose.
  4. Block and unblock the air hole of PCV valve and check if a hissing noise can be heard from the air hole.
    GNSDB126973Courtesy of NISSAN NORTH AMERICA, INC.
  5. Is the inspection result normal? YES >> INSPECTION ENDNO >> Replace PCV valve. Refer to Exploded View .