1. Remove the PCV valve, cap or plug the PCV valve port at the intake manifold.
2. Attach an air hose with a pressure gauge and regulator onto the dipstick tube.
CAUTION: Do not subject the engine assembly to more than 20.6 kPa (3 PSI) of test pressure.
3. Gradually apply air pressure from 1 psi to 2.5 psi maximum while applying soapy water at the
suspected source. Adjust the regulator to the suitable test pressure that provide the best
bubbles which will pinpoint the leak source. If the oil leak is detected and identified, repair per
Service Information procedures.
4. If the leakage occurs at the rear oil seal area, proceed with the INSPECTION FOR REAR SEAL
AREA LEAKS.
5. If no leaks are detected, turn off the air supply and remove the air hose from the dipstick tube.
6. Remove the PCV port plug or cap at the intake manifold and install the PCV valve.
7. Clean the oil off the suspect oil leak area using a suitable solvent. Drive the vehicle at various speeds approximately 24 km (15 miles). Inspect the engine for signs of an oil leak by using a black light. If the oil leak is found and identified, repair per Service Information procedures.