Contents: PCV valve ↳ Crankcase ventilation filter ↳
Note: To ensure efficient operation of the PCV system, periodically clean the lines, check the PCV valve and crankcase ventilation filter as recommended in the maintenance schedule. Additional information on the PCV system is provided in Chapter 6.
PCV valve
1. Locate the PCV valve on the valve cover.
2. To check the valve, remove it from the valve cover (see picture) and shake it - if it clicks, put it back on the cover.
3. Start the engine and let it idle, then disconnect the PCV valve from the air cleaner housing and check for vacuum. If there is vacuum, the valve and PCV system are working properly.
4. If there is no vacuum, there is a problem with the oil filler cap, hoses, gasket, valve cover or PCV valve. Look for vacuum leaks at the valve, filler cap, filter assembly (if equipped) and all hoses.
5. To remove the valve, pull it up. Check the rubber sealing ring of the valve cover for cracks and wear. If damaged, replace it.
6. If the valve is clogged with deposits, remove and inspect the PCV filter. In some vehicles, this filter is integral with the oil filler cap; if your vehicle has this filter, a plastic hose connects the cap to the air cleaner housing. In other vehicles, the filter assembly is in a separate housing. Recheck the rubber seal between the PCV filter and the valve cover for cracks and wear. Replace if damaged.
7. If the valve is clogged, the hoses may also be clogged. Remove the hose leading from the valve to the intake pipe and the hose from the filter to the air cleaner body, and wash them with solvent.
8. After flushing the hoses, inspect for any damage, wear and tear. Make sure the hoses are tightly seated on the nozzles.
9. Install a new PCV valve if necessary.
Note: The elbow is not part of the PCV valve. The new valve does not have an elbow, you need to put the remaining part of the old valve on it. If you bought a new one, then before putting it on the valve, you should soak it in warm water for about an hour. Do not put the elbow on with force, otherwise it may break.
10. Install clean PCV hoses to ensure they are secure.
Crankcase ventilation filter
11. The crankcase ventilation system screens oil vapors from the crankcase before they enter the air cleaner and are burned in the engine. Some models are equipped with a crankcase ventilation system consisting of a filter located on the valve cover, connected by one or more hoses to the air cleaner housing.
Other models only have a hose connecting the valve cover and the air cleaner. The filter and hose should be inspected and cleaned at regular intervals.
12. Remove the filter (if any) and hose from the engine (see figure).
13. Wash the filter with industrial alcohol or solvent and inspect it for oil deposits. If the filter is clogged, replace it with a new one.
14. Soak the hose in industrial alcohol or solvent and clean it from the inside with a long brush or a rag wound around a wire.
15. Let the filter and hose air dry, then install them into the engine.
This article is a copy from the website FORDBOOK.ru