Inspect, test, and service positive crankcase ventilation (PCV) filter/breather, valve, tubes, orifices, and hoses; perform the necessary action.

Procedure should include

• checking for proper PCV filter/breather function
• referring to service materials and following manufacturer guidelines.

Process/Skill Questions:

• Why does a crankcase need ventilation?
• What is the function of a PCV valve?
• What is the difference between a vehicle that uses a PCV vs. an orifice system?