Mercury E5ZZ-6A666-A Valve Assembly

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To maintain efficient operation of the PCV system, clean the hoses and check the PCV valve at the intervals recommended in the maintenance schedule. For additional information on the PCV system, locate the PCV valve which is located in the valve cover at the right (passenger) rear corner of the engine compartment. Check the valve by first pulling it out of the valve cover. Shake it- if it rattles, reinstall it in the cover. Start the engine and allow it to idle, then disconnect the PCV hose from the air cleaner housing and feel for vacuum at the hose. If vacuum is felt, the PCV valve/system is working properly. If no vacuum is felt, the oil filler cap, hoses or valve cover gasket may be leaking or the PCV valve may be bad. Check for vacuum leaks at the valve, filler cap and all hoses. Pull straight up on the valve to remove it. Check the rubber grommet in the rocker arm cover for cracks and distortion. If it's damaged, replace it. If the valve is clogged, the hose is also probably plugged. Remove the hose between the valve and the intake manifold and clean it with solvent. After cleaning the hose, inspect it for damage, wear and deterioration. Make sure it fits snugly on the fittings. If necessary, install a new PCV valve. Note: The elbow is not part of the PCV valve. A new valve will not include the elbow. The original must be transferred to the new valve. If a new elbow is purchased, it may be necessary to soak it in warm water for up to an hour to slip it onto the new valve. Do not attempt to force the elbow onto the valve or it will break. Install the clean PCV system hose. Make sure that the PCV valve and hose are secure.

The Positive Crankcase Ventilation (PCV) system cycles crankcase vapors back through the engine, where they are burned. The valve regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase. The PCV system consists of a replaceable PCV valve, a crankcase ventilation filter, and connecting hoses. The air source for the crankcase ventilation system is in the air cleaner. Air passes through a hose connected to the air cleaner housing and to the oil filler cap. From the oil filler cap, the air flows into the valve cover and the crankcase, from which it circulates up into another section of the valve cover and finally enters a spring-loaded regulator valve (PCV valve) that controls the amount of flow as operating conditions vary. The vapors are routed to the intake manifold through the crankcase vent hose tube and fittings. This process goes on continuously while the engine is running. Checking procedures for the PCV system components are included, and component replacement involves simply installing a new valve or hose in place of the one removed during the checking procedure.

To maintain the efficiency of the PCV system, clean the hoses and check the PCV valve at the intervals recommended in the maintenance schedule. Locate the PCV valve. On four-cylinder EFI engines, the air cleaner assembly must be removed to gain access to the PCV valve. To check the valve, first pull it out of the grommet in the rocker arm cover or manifold, or out of the lower hose. Shake the valve. It should rattle, indicating that it is not clogged with deposits. If the valve does not rattle, replace it with a new one. If it does rattle, reinstall it. Start the engine and allow it to idle, then disconnect the PCV hose. If vacuum is felt, the PCV/valve system is working properly. If no vacuum is felt, the oil filler cap, hoses or rocker arm cover gasket may be leaking or the PCV valve may be bad. Check for vacuum leaks at the valve, filler cap and all hoses. Pull straight up on the valve to remove it. Check the rubber grommet for cracks and distortion. If it's damaged, replace it. If the valve is clogged, the hose is also probably plugged. Remove the hose and clean it with solvent. After cleaning the hose, inspect it for damage, wear and deterioration. Make sure it fits snugly on the fittings. If necessary, install a new PCV valve. The elbow is not part of the PCV valve. A new valve will not include the elbow. The original must be transferred to the new valve. If a new elbow is purchased, it may be necessary to soak it in warm water for up to an hour to slip it onto the new valve. Do not attempt to force the elbow onto the valve or it will break. Install the clean PCV system hose. Make sure the PCV valve and hose are secure.

The purpose of the PCV system is to reduce hydrocarbon emissions by scavenging crankcase vapors and circulating fresh air through the crankcase.

The oil filler cap, hoses, or valve cover gasket may be leaking, or the PCV valve may be bad. Vacuum leaks at the valve, filler cap, and all hoses should be checked.

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

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

It should be ensured that the PCV valve and hose are secure.

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

The purpose of the PCV system is to cycle crankcase vapors back through the engine, where they are burned.

Start the engine and allow it to idle, then disconnect the PCV hose from the air cleaner housing and feel for vacuum at the hose. If vacuum is felt, the PCV valve/system is working properly.

No, the elbow is not part of the PCV valve.

It should be replaced.