Chevrolet 8996086 Valve,Pcv

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The PCV valve is located in the rear of the intake manifold on V6 engines for 1981-87 models.

To check for proper vacuum, remove the top plate of the air cleaner and disconnect the hose leading to the small PCV filter. With the engine idling, place your thumb lightly over the end of the hose. You should feel a slight pull or vacuum if the system is functioning properly.

The breather filter should be replaced when the air cleaner element is replaced.

Before installing the new PCV valve, you should compare it with the old one to ensure they are identical.

More information on the PCV system can be found elsewhere.

If the rubber grommet is damaged, you should replace it with a new one.

The hose connected to the PCV valve runs to the carburetor.

The PCV system should be checked regularly because carbon and gunk can clog the PCV valve and hoses over time, leading to reduced or stopped flow in the system.

The PCV valve is connected to a hose that runs to either the carburetor or the intake manifold.

The PCV valve is located in either the rocker arm cover or intake manifold.

The positive crankcase ventilation (PCV) system reduces hydrocarbon emissions by circulating fresh air through the crankcase to pick up blow-by gases, which are then re-routed through the carburetor to be reburned by the engine. The main components of this system are vacuum hoses and a PCV valve, which regulates the flow of gases according to engine speed and manifold vacuum. The PCV system should be checked regularly for proper operation, as carbon and gunk can clog the PCV valve and hoses over time. Symptoms of reduced or stopped flow in the system include rough idling or a reduced engine speed at idle. To check for proper vacuum, remove the top plate of the air cleaner and disconnect the hose leading to the small PCV filter. With the engine idling, place your thumb lightly over the end of the hose. You should feel a slight pull or vacuum, indicating that air is being drawn through the system. If there is very little or no vacuum, the system is clogged and further inspection is required. The PCV valve can be checked by shaking it and listening for a clicking sound, indicating the valve's check needle is functioning properly. If the valve does not click freely, it should be replaced. Running the engine at idle speed with the PCV valve removed should result in a relatively strong vacuum. If little or no vacuum is felt, the vacuum hose or inlet fitting at the engine may be blocked. A clogged passage at the carburetor or manifold requires thorough cleaning, while a failure of the PCV valve necessitates replacement. When purchasing a new PCV valve, ensure it is the proper one to avoid causing damage to the engine.