General description
1. The Positive Crankcase Ventilation (PCV) system (see illustration) forces crankcase vapors back into the engine where they are burned. The valve regulates the amount of ventilated air and blown gas into the intake manifold and prevents burning particles from entering the crankcase.
6.1. Typical efficient crankcase ventilation system.
1. To the evaporator valve.
2. PCV valve.
3. Sealed hose for 2.3L and 3.8L engines.
4. Oil filler cap.
5. The path of air.
6. Air purifier.
7. Carburetor.
8. Intake manifold.
9. Distribution mechanism cover.
10. Engine crankcase.
2. The PCV system consists of a replaceable PCV valve, a crankcase ventilation filter (on some vehicles it is made integral with the oil filler cap, on others it is separate) and connecting hoses.
3. The source of air for the PCV system is the air cleaner. Air passes through the PCV filter (in the timing cover or oil filler cap) and through a hose connected to the air cleaner housing. Where the PCV filter is mounted in the oil filler cap, the cap is sealed around the contour to prevent air from entering from the outside. From the oil filler cap, or from a separate PCV filter on the timing cover, air enters the timing chamber and crankcase, from where it circulates up into another section of the timing chamber and finally reaches a spring-loaded valve adjuster (PCV valve), which varies the flow rate according to changing conditions. Vapors enter the intake manifold through the crankcase vent hose tube and tips. This process occurs continuously while the engine is running.
Examination
4. Description of the procedures for testing the PCV system components is included in chapter 1.
Replacement of elements
5. Replacing the elements involves simply installing a new valve or hose in place of the one removed during the inspection.
[The original article is available on the website FORDBOOK.RU]