LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (3.6L Engine (Service Information)) >> Diagnosis And Testing >> Oil Consumption Test And Diagnosis >> Oil Consumption Diagnosis

Oil Consumption Diagnosis

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
  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 CYLINDER COMPRESSION TEST  and CYLINDER LEAKAGE TEST .
    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.
scientia non olet · About LEMON Manuals