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Home >> Mitsubishi >> 2014 >> Lancer Evolution MR >> Repair and Diagnosis >> Engine Performance >> System >> Emission Control - Lancer Evolution >> Crankcase Ventilation System Check
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Crankcase Ventilation System Check

  1. Remove the ventilation hose from the positive crankcase ventilation (PCV) valve.
  2. Remove the PCV valve from the rocker cover.
  3. Reinstall the PCV valve at the ventilation hose.
  4. Start the engine and run at idle.
  5. Place a finger at the opening of the PCV valve and check that vacuum of the intake manifold is felt.
    NOTE: At this moment, the plunger in the PCV valve moves back and forth.
  6. If vacuum is not felt, clean the PCV valve or replace it.
  7. Apply a small amount of new engine oil to the O-ring on the PCV valve, and tighten to the specified torque.

    Standard value: 2.5 ± 0.4 N.m (22 ± 3 in-lb) 

    Fig 1: Checking Vacuum Of Intake Manifold
    G09641098Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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