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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 3.6L Engine (Service Information) (1 Of 2) >> Diagnosis And Testing >> Oil Consumption Test And Diagnosis >> Oil Consumption Diagnosis

Oil Consumption Diagnosis

  1. Check the Positive Crankcase Ventilation (PCV) system. Make sure the system is not restricted and the PCV valve has the correct part number and correct vacuum source (18-20 in. Hg at idle below 3000 ft. above sea level is considered normal).
  2. Perform a cylinder compression test and cylinder leakage test using the standard cylinder leakage tester and following manufacturers suggested best practices. Refer to RELATIVE COMPRESSION TEST - MOPAR SCOPE .
    NOTE:

    Verify the spark plugs are not oil saturated. If the spark plugs are oil saturated and compression is good it can be assumed the valve seals or valve guides are at fault.

  3. If one or more cylinders have more than 25% leak down further engine tear down and inspection will be required.
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