Title: Inspect, test, and service positive crankcase ventilation (PCV) filter/breather, valve, tubes, orifices, and hoses; perform necessary action.
Course: Automotive Technology II (20104-II) > Section: Engine Performance: Emissions Control Systems

Procedure should include

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

ASE Education Foundation
2017 Maintenance and Light Repair (MLR) Level
VIII. Engine Performance
D. Emissions Control Systems
Task 1

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?