Ford 3L8Z-6A666-AD Valve Assembly

One must regularly clean and check the PCV valve and hoses to keep the PCV system efficient. The valve can be found in different places depending on the model of the engine. It should shake when you take it out and give it a good shake, or just replace it if you do not hear anything. Check if there is any vacuum after detaching the hose. If there is no vacuum it means that one should look for leaks or replace any damaged components. Ensure that the hose is clean and in good condition with necessary fittings. Fit a new valve where necessary and reconnect the hose safely too.

Start the engine and allow it to idle, then disconnect the PCV valve from the valve cover and feel for vacuum at the end of the valve. If vacuum is felt, the PCV valve/system is working properly.

The main components of the PCV system are the PCV valve, a fresh-air filtered inlet, and the vacuum hoses connecting these two components with the engine and the EECS system.

To remove the PCV valve, trace the ventilation hose to the valve and disconnect it. The valve can then be pulled out. If the hose is damaged, the thermostat housing may need to be removed for access.

Most of the covered models have the PCV valve mounted in the crankcase ventilation oil separator, which is mounted low on the engine.

The purpose of the PCV system is to reduce hydrocarbon emission by scavenging crankcase vapors.

Carefully pry off the small round cap holding the PCV valve in place.

The PCV system consists of a fresh-air inlet hose, the PCV valve, and the PCV hose (crankcase ventilation hose) that connects the PCV valve to the intake manifold. It also includes a crankcase vent oil separator that prevents oil from entering the PCV valve.