W2 - Check Engine For External Leaks

^ Check the following components for leakage:
- Valve cover gasket
- Crankshaft seals
- Oil pan gasket and seals
- Dipstick
- Oil filter and seal
- Oil pump
- Engine assembly

^ Are external leaks evident?

YES -- Service as necessary.

NO -- Go to W3. W3 - Check Positive Ventilation (PCV) System