GMC 6487779 Valve,Pcv

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Instead of venting them to the atmosphere, a positive crankcase ventilation (PCV) system is used to consume crankcase vapors in the combustion process. In gasoline engines, small amounts of combustion gas pass by the piston rings and get into the crankcase. Such crankcase blow-by gases have unwanted air pollutants, which are hydrocarbons. The PCV system is used to keep these vapors from getting away into the atmosphere while still allowing for adequate ventilation of the crankcase that ensures good oil quality. It should be checked every time you change oil and serviced every 48,000 kilometers (30,000 miles). For it can be damaged, never run an engine without a PCV valve or a ventilation system. Beginning with locating PCV valve usually found either in valve cover or intake manifold and then disconnecting the crank case ventilation tube from the positive crank case ventilation valve followed by removing the PCV valve from its grommet, install PCV valve by having it inserted into grommet with connecting ventilation tube to PCV valve.

Usually, you may find the PCV valve pushed into one of the rocker arm covers on the side of the engine, with a hose attached to it which runs either to the intake manifold or the carburetor. Thus, when purchasing a new PCV valve, make sure that it is designed for your specific vehicle, model year and engine size. Subsequently, use pliers or screwdriver (according to type of pipe clip) to loosen clamp on end of hose and move clamp up toward PCV hose. Next, pull the PCV valve off from its end of hose while remembering its installed position and direction. This will assist in ensuring that the old valve is similar to the new one. Gently push new valve until fully seated into end of hose. Move hose clamp down hose then tighten it securely around end of hose. Inspect rubber grommet in cover for damage and replace if necessary. Lastly, press in the PCV valve and hose snugly into rocker arm cover. More information about PCV system can be found elsewhere.

If the engine runs at normal operating temperature, while idling, withdraw the valve (with attached hose) from the rubber grommet on the valve cover. In a V6 engine, PCV valve takes place in a valve cover. Take it out and see if there is any suction and shake it to check for rattles. Put your finger over the tip of the valve. If there is no vacuum at the valve, test a clogged hose, manifold port or valve itself. Replace any plugged or deteriorated hoses. Shut off engine and shake PCV valve; listen for rattle. If it does not rattle, get a new one to replace that which exists currently but doesn't make noise when shaken, and pull it out of end of hose so that you can take note its installed position as well as direction before replacing it again with an identical one To fit a replacement PCV vale, remove it from the end of hose and remember how it has been placed consequently you may have problems with finding appropriate vehicle model year, size for such an item purchased only after comparing previous characteristics with new ones Check for damage on rubber grommet and if need be install a new one. Lastly push another pcv valve and hose into their respective slots inside the valve cover securely.

Replace any plugged or deteriorated hoses.

If you don't feel any vacuum, this could indicate a clogged hose, manifold port, or the valve itself. In this case, any plugged or deteriorated hoses should be replaced.

If you don't feel any vacuum, this could indicate a clogged hose, manifold port, or the valve itself. In this case, any plugged or deteriorated hoses should be replaced.

To replace the valve, pull it out of the end of the hose, noting its installed position and direction. When purchasing a replacement PCV valve, make sure it's for your particular vehicle, model year, and engine size. Compare the old valve with the new one to make sure they are the same. Push the valve into the end of the hose until it's seated. Inspect the rubber grommet for damage and replace it with a new one if necessary. Finally, push the PCV valve and hose securely into position in the valve cover.

To replace the PCV valve, first, pull the valve (with the hose attached) from the rubber grommet in the rocker arm cover or manifold. Then, loosen the retaining clamp and remove the PCV valve from the end of the hose, taking note of its installed position and direction. Compare the old valve with the new one to ensure that they are the same. Push the new valve into the end of the hose until it is properly seated, and then reinstall the clamp. Inspect the rubber grommet for any damage and replace it with a new one if necessary. Finally, securely push the PCV valve and hose into position.