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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Adaptive Cruise Control System (Acc) & Emission Control (MFI) - With Diagnostics) >> Emission Control (MFI) >> Positive Crankcase Ventilation System >> General Information (Positive Crankcase Ventilation System) >> Positive Crankcase Ventilation (PCV) Valve Check

Positive Crankcase Ventilation (PCV) Valve Check

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the ventilation hose from the positive crankcase ventilation (PCV) valve.
  2. Remove the PCV valve from the rocker cover.
  3. Hold the PCV valve with the vacuum side down. Insert a thin rod, and using light pressure, depress the end of the PCV valve spring by 5 - 10 mm (0.2 - 0.3 inch). Release pressure on the rod to see if the PCV valve spring will lift the rod to its original position.
  4. If the rod returns quickly to its original position, the PCV valve is OK. If the stick does not return quickly, clean or replace the PCV valve.
  5. Apply a small amount of new engine oil to the O-ring on the PCV valve, and tighten to the specified torque.

    Specified torque: 2.5 ± 0.4 Nm (22 ± 3 in-lb) 

    Fig 1: Testing Positive Crankcase Ventilation Valve
    G09664835Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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